Added backend

backend/.env

@@ -0,0 +1,9 @@
+SERVER_PORT=8080
+
+# the global address of your webserver (protocol://domain[:port]). make sure this DOES NOT has a trailing slash
+ADDRESS=http://localhost:8080
+# the path you serve on
+SUBPATH=
+
+DATABASE_FILE=database.sqlite3
+FRONTEND_DIR=./frontend/

backend/.gitignore

@@ -0,0 +1 @@
+.idea/

backend/README.md

@@ -0,0 +1 @@
+# backend

backend/api/api.go

@@ -0,0 +1,48 @@
+package api
+
+import (
+	"encoding/json"
+	"net/http"
+)
+
+var (
+	DatabaseError = ApiError{Message: "internal database error", Code: http.StatusInternalServerError}
+	InvalidJson   = ApiError{Message: "invalid json", Code: http.StatusUnprocessableEntity}
+)
+
+type ApiError struct {
+	Message string `json:"message"`
+	Code    int    `json:"-"`
+}
+
+func (ae ApiError) Send(w http.ResponseWriter) error {
+	w.WriteHeader(ae.Code)
+	return json.NewEncoder(w).Encode(ae)
+}
+
+var sessions = map[string]int{}
+
+type article struct {
+	ID       int    `json:"-"`
+	Title    string `json:"title"`
+	Summary  string `json:"summary"`
+	Image    string `json:"image"`
+	Created  int64  `json:"created"`
+	Modified int64  `json:"modified"`
+	Link     string `json:"link"`
+	Markdown string `json:"markdown"`
+	Html     string `json:"html"`
+}
+
+func authorizedSession(r *http.Request) (int, bool) {
+	cookie, err := r.Cookie("session_id")
+	if err != nil {
+		return 0, false
+	}
+	for sessionId, authorId := range sessions {
+		if sessionId == cookie.Value {
+			return authorId, true
+		}
+	}
+	return 0, false
+}

backend/api/api_test.go

@@ -0,0 +1,136 @@
+package api
+
+import (
+	"TheAdversary/database"
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	url2 "net/url"
+	"os"
+	"path/filepath"
+	"reflect"
+	"testing"
+)
+
+type testInformation struct {
+	Method string
+	Header map[string]string
+	Cookie map[string]string
+	Body   interface{}
+	Query  map[string]interface{}
+
+	ResultBody   interface{}
+	ResultCookie []string
+	Code         int
+
+	AfterExec func(*testInformation)
+}
+
+func initTestDatabase(name string) error {
+	path := filepath.Join(os.TempDir(), name)
+
+	if _, err := os.Stat(path); !os.IsNotExist(err) {
+		if err = os.Remove(path); err != nil {
+			return err
+		}
+	}
+
+	db, err := database.NewSqlite3Connection(path)
+	if err != nil {
+		return err
+	}
+	database.SetGlobDB(db)
+	declaration, _ := os.ReadFile("../database.sql")
+	db.Exec(string(declaration))
+
+	return nil
+}
+
+func initSession() string {
+	sessid := sessionId()
+	sessions[sessid] = 1
+	return sessid
+}
+
+func checkTestInformation(t *testing.T, url string, information []testInformation) {
+	for i, information := range information {
+		var body io.Reader
+		if information.Body != nil {
+			if b, ok := information.Body.([]byte); ok {
+				body = bytes.NewReader(b)
+			} else {
+				buf, _ := json.Marshal(information.Body)
+				body = bytes.NewReader(buf)
+			}
+		}
+
+		query := url2.Values{}
+		if information.Query != nil {
+			for key, value := range information.Query {
+				query.Add(key, fmt.Sprintf("%v", value))
+			}
+		}
+
+		req, _ := http.NewRequest(information.Method, fmt.Sprintf("%s?%s", url, query.Encode()), body)
+		if information.Cookie != nil {
+			for name, value := range information.Cookie {
+				req.AddCookie(&http.Cookie{
+					Name:  name,
+					Value: value,
+				})
+			}
+		}
+		if information.Header != nil {
+			for name, value := range information.Header {
+				req.Header.Set(name, value)
+			}
+		}
+
+		resp, _ := http.DefaultClient.Do(req)
+
+		if information.AfterExec != nil {
+			information.AfterExec(&information)
+		}
+
+		if resp.StatusCode != information.Code {
+			t.Errorf("Test %d sent invalid status code: expected %d, got %d", i+1, information.Code, resp.StatusCode)
+		}
+
+		if resp.Body != nil {
+			var respBody, informationBody interface{}
+			json.NewDecoder(resp.Body).Decode(&respBody)
+			resp.Body.Close()
+
+			tmpInformationBytes, _ := json.Marshal(information.ResultBody)
+			json.Unmarshal(tmpInformationBytes, &informationBody)
+
+			if !reflect.DeepEqual(respBody, informationBody) {
+				respBytes, _ := json.Marshal(respBody)
+				informationBytes, _ := json.Marshal(informationBody)
+
+				// for some reason the maps are sometimes not matched as equal.
+				// this is an additional checks if the map bytes are equal
+				if !bytes.Equal(respBytes, informationBytes) {
+					t.Errorf("Test %d sent invalid response body: expected %s, got %s", i+1, informationBytes, respBytes)
+				}
+			}
+		}
+
+		if information.ResultCookie != nil {
+			for _, cookie := range information.ResultCookie {
+				var found bool
+				for _, respCookie := range resp.Cookies() {
+					if cookie == respCookie.Name {
+						found = true
+						break
+					}
+				}
+				if !found {
+					t.Errorf("Test %d sent invalid cookies: expected %s, got none", i+1, cookie)
+				}
+			}
+		}
+	}
+}

backend/api/article.go

@@ -0,0 +1,308 @@
+package api
+
+import (
+	"TheAdversary/config"
+	"TheAdversary/database"
+	"TheAdversary/schema"
+	"encoding/base64"
+	"encoding/json"
+	"fmt"
+	"github.com/gomarkdown/markdown"
+	"go.uber.org/zap"
+	"net/http"
+	"net/url"
+	"path"
+	"strconv"
+	"strings"
+	"time"
+)
+
+func Article(w http.ResponseWriter, r *http.Request) {
+	switch r.Method {
+	case http.MethodGet:
+		articleGet(w, r)
+	case http.MethodPost:
+		articlePost(w, r)
+	case http.MethodDelete:
+		articleDelete(w, r)
+	case http.MethodPatch:
+		articlePatch(w, r)
+	}
+}
+
+type getResponse struct {
+	Title   string   `json:"title"`
+	Summary string   `json:"summary"`
+	Authors []int    `json:"authors"`
+	Image   string   `json:"image"`
+	Tags    []string `json:"tags"`
+	Link    string   `json:"link"`
+	Content string   `json:"content"`
+}
+
+func articleGet(w http.ResponseWriter, r *http.Request) {
+	authorId, ok := authorizedSession(r)
+	if !ok {
+		w.WriteHeader(http.StatusUnauthorized)
+		return
+	}
+
+	rawId := r.URL.Query().Get("id")
+
+	if rawId == "" {
+		ApiError{Message: "no id was given", Code: http.StatusBadRequest}.Send(w)
+		return
+	}
+	id, err := strconv.Atoi(rawId)
+	if err != nil {
+		ApiError{"invalid 'id' parameter", http.StatusUnprocessableEntity}.Send(w)
+		return
+	}
+
+	if !database.Exists(database.GetDB().Table("article_author"), "author_id=?", authorId) {
+		w.WriteHeader(http.StatusUnauthorized)
+		return
+	}
+
+	var article database.Article
+	if database.GetDB().Table("article").First(&article, id).RowsAffected == 0 {
+		ApiError{Message: "no such id", Code: http.StatusNotFound}.Send(w)
+		return
+	}
+
+	resp := getResponse{
+		Title:   article.Title,
+		Summary: article.Summary,
+		Image:   article.Image,
+		Link:    article.Link,
+		Content: base64.StdEncoding.EncodeToString([]byte(article.Markdown)),
+	}
+	database.GetDB().Table("article_author").Select("author_id").Where("article_id", article.Id).Find(&resp.Authors)
+	database.GetDB().Table("article_tag").Select("tag").Where("article_id", article.Id).Find(&resp.Tags)
+
+	json.NewEncoder(w).Encode(resp)
+}
+
+type uploadPayload struct {
+	Title   string   `json:"title"`
+	Summary string   `json:"summary"`
+	Authors []int    `json:"authors"`
+	Image   string   `json:"image"`
+	Tags    []string `json:"tags"`
+	Link    string   `json:"link"`
+	Content string   `json:"content"`
+}
+
+func articlePost(w http.ResponseWriter, r *http.Request) {
+	authorId, ok := authorizedSession(r)
+	if !ok {
+		w.WriteHeader(http.StatusUnauthorized)
+		return
+	}
+
+	var payload uploadPayload
+	if err := json.NewDecoder(r.Body).Decode(&payload); err != nil {
+		InvalidJson.Send(w)
+		return
+	}
+
+	rawMarkdown, err := base64.StdEncoding.DecodeString(payload.Content)
+	if err != nil {
+		zap.S().Warnf("Cannot decode base64")
+		ApiError{Message: "invalid base64 content", Code: http.StatusUnprocessableEntity}.Send(w)
+		return
+	}
+
+	var notFound []string
+	database.GetDB().Select("* FROM ? EXCEPT ?", payload.Authors, database.GetDB().Table("author").Select("id")).Find(&notFound)
+	if len(notFound) > 0 {
+		ApiError{fmt.Sprintf("no authors with the id(s) %s were found", strings.Join(notFound, ", ")), http.StatusUnprocessableEntity}.Send(w)
+		return
+	}
+
+	a := article{
+		Title:    payload.Title,
+		Summary:  payload.Summary,
+		Image:    payload.Image,
+		Created:  time.Now().Unix(),
+		Modified: time.Unix(0, 0).Unix(),
+		Link:     payload.Link,
+		Markdown: string(rawMarkdown),
+		Html:     string(markdown.ToHTML(rawMarkdown, nil, nil)),
+	}
+	database.GetDB().Table("article").Create(&a)
+	var authors []map[string]interface{}
+	for _, author := range append([]int{authorId}, payload.Authors...) {
+		authors = append(authors, map[string]interface{}{
+			"article_id": a.ID,
+			"author_id":  author,
+		})
+	}
+	database.GetDB().Table("article_author").Create(&authors)
+	if len(payload.Tags) > 0 {
+		var tags []map[string]interface{}
+		for _, tag := range payload.Tags {
+			authors = append(authors, map[string]interface{}{
+				"article_id": a.ID,
+				"tag":        tag,
+			})
+		}
+		database.GetDB().Table("article_tag").Create(&tags)
+	}
+
+	var articleSummary schema.ArticleSummary
+	database.GetDB().Table("article").Find(&articleSummary, &a.ID)
+	database.GetDB().Table("author").Where("id IN (?)", database.GetDB().Table("article_author").Select("author_id").Where("article_id = ?", a.ID)).Find(&articleSummary.Authors)
+	if payload.Tags != nil {
+		articleSummary.Tags = payload.Tags
+	} else {
+		articleSummary.Tags = []string{}
+	}
+	articleSummary.Link = path.Join(config.SubPath, "article", url.PathEscape(articleSummary.Link))
+
+	w.WriteHeader(http.StatusCreated)
+	json.NewEncoder(w).Encode(articleSummary)
+}
+
+type editPayload struct {
+	Id      int       `json:"id"`
+	Title   *string   `json:"title"`
+	Summary *string   `json:"summary"`
+	Authors *[]int    `json:"authors"`
+	Image   *string   `json:"image"`
+	Tags    *[]string `json:"tags"`
+	Link    *string   `json:"link"`
+	Content *string   `json:"content"`
+}
+
+func articlePatch(w http.ResponseWriter, r *http.Request) {
+	authorId, ok := authorizedSession(r)
+	if !ok {
+		w.WriteHeader(http.StatusUnauthorized)
+		return
+	}
+
+	var payload editPayload
+	if err := json.NewDecoder(r.Body).Decode(&payload); err != nil {
+		InvalidJson.Send(w)
+		return
+	}
+	if !database.Exists(database.GetDB().Table("article"), "id = ?", payload.Id) {
+		w.WriteHeader(http.StatusNotFound)
+		return
+	} else if !database.Exists(database.GetDB().Table("article_author"), "article_id = ? AND author_id = ?", payload.Id, authorId) {
+		w.WriteHeader(http.StatusUnauthorized)
+		return
+	}
+
+	updates := map[string]interface{}{}
+	var authorUpdates, tagUpdates []map[string]interface{}
+
+	a := article{
+		ID:       payload.Id,
+		Modified: time.Now().Unix(),
+	}
+
+	if payload.Title != nil {
+		updates["title"] = *payload.Title
+	}
+	if payload.Summary != nil {
+		updates["summary"] = *payload.Summary
+	}
+	if payload.Authors != nil {
+		var notFound []string
+		database.GetDB().Select("* FROM ? EXCEPT ?", *payload.Authors, database.GetDB().Table("author").Select("id")).Find(&notFound)
+		if len(notFound) > 0 {
+			ApiError{fmt.Sprintf("no authors with the id(s) %s were found", strings.Join(notFound, ", ")), http.StatusUnprocessableEntity}.Send(w)
+			return
+		}
+		for _, author := range append([]int{authorId}, *payload.Authors...) {
+			authorUpdates = append(authorUpdates, map[string]interface{}{
+				"article_id": payload.Id,
+				"author_id":  author,
+			})
+		}
+	}
+	if payload.Tags != nil {
+		for _, tag := range *payload.Tags {
+			tagUpdates = append(tagUpdates, map[string]interface{}{
+				"article_id": payload.Id,
+				"tag":        tag,
+			})
+		}
+	}
+	if payload.Image != nil {
+		updates["image"] = *payload.Image
+	}
+	if payload.Link != nil {
+		updates["link"] = *payload.Link
+	}
+	if payload.Content != nil {
+		rawMarkdown, err := base64.StdEncoding.DecodeString(*payload.Content)
+		if err != nil {
+			zap.S().Warnf("Cannot decode base64")
+			ApiError{Message: "invalid base64 content", Code: http.StatusUnprocessableEntity}.Send(w)
+			return
+		}
+		a.Markdown = string(rawMarkdown)
+		a.Html = string(markdown.ToHTML(rawMarkdown, nil, nil))
+		updates["markdown"] = string(rawMarkdown)
+		updates["html"] = string(markdown.ToHTML(rawMarkdown, nil, nil))
+	}
+
+	if len(updates) > 0 {
+		updates["modified"] = time.Now().Unix()
+
+		database.GetDB().Table("article").Where("id = ?", payload.Id).Updates(&updates)
+		if authorUpdates != nil {
+			database.GetDB().Table("article_author").Where("article_id = ?", payload.Id).Delete(nil)
+			database.GetDB().Table("article_author").Create(&authorUpdates)
+		}
+		if tagUpdates != nil {
+			database.GetDB().Table("article_tag").Where("article_id = ?", payload.Id).Delete(nil)
+			database.GetDB().Table("article_tag").Create(&tagUpdates)
+		}
+	}
+
+	var articleSummary schema.ArticleSummary
+	database.GetDB().Table("article").Find(&articleSummary, payload.Id)
+	database.GetDB().Table("author").Where("id IN (?)", database.GetDB().Table("article_author").Select("author_id").Where("article_id = ?", payload.Id)).Find(&articleSummary.Authors)
+	if payload.Tags != nil {
+		articleSummary.Tags = *payload.Tags
+	} else {
+		articleSummary.Tags = []string{}
+	}
+	articleSummary.Link = path.Join(config.SubPath, "article", url.PathEscape(articleSummary.Link))
+
+	w.WriteHeader(http.StatusOK)
+	json.NewEncoder(w).Encode(articleSummary)
+}
+
+type deletePayload struct {
+	Id int `json:"id"`
+}
+
+func articleDelete(w http.ResponseWriter, r *http.Request) {
+	authorId, ok := authorizedSession(r)
+	if !ok {
+		w.WriteHeader(http.StatusUnauthorized)
+		return
+	}
+
+	var payload deletePayload
+	if err := json.NewDecoder(r.Body).Decode(&payload); err != nil {
+		InvalidJson.Send(w)
+		return
+	}
+	if !database.Exists(database.GetDB().Table("article"), "id = ?", payload.Id) {
+		w.WriteHeader(http.StatusNotFound)
+		return
+	} else if !database.Exists(database.GetDB().Table("article_author"), "article_id = ? AND author_id = ?", payload.Id, authorId) {
+		w.WriteHeader(http.StatusUnauthorized)
+		return
+	}
+
+	database.GetDB().Table("article").Delete(&payload)
+
+	w.WriteHeader(http.StatusOK)
+}

backend/api/article_test.go

@@ -0,0 +1,319 @@
+package api
+
+import (
+	"TheAdversary/database"
+	"TheAdversary/schema"
+	"encoding/base64"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+	"time"
+)
+
+func TestArticleGet(t *testing.T) {
+	if err := initTestDatabase("upload_get_test.sqlite3"); err != nil {
+		t.Fatal(err)
+	}
+
+	database.GetDB().Table("article").Create([]map[string]interface{}{
+		{
+			"title":    "Get test",
+			"summary":  "",
+			"created":  time.Now().Unix(),
+			"link":     "get-test",
+			"markdown": "Testing ._.",
+			"html":     "<p>Testing ._.<p>",
+		},
+	})
+	database.GetDB().Table("author").Create([]map[string]interface{}{
+		{
+			"name":        "admin",
+			"password":    "",
+			"information": "admin",
+		},
+	})
+	database.GetDB().Table("article_author").Create([]map[string]interface{}{
+		{
+			"article_id": 1,
+			"author_id":  1,
+		},
+	})
+
+	server := httptest.NewServer(http.HandlerFunc(articleGet))
+	checkTestInformation(t, server.URL, []testInformation{
+		{
+			Method: http.MethodGet,
+			Code:   http.StatusUnauthorized,
+		},
+		{
+			Method: http.MethodGet,
+			Cookie: map[string]string{
+				"session_id": initSession(),
+			},
+			ResultBody: map[string]interface{}{
+				"message": "no id was given",
+			},
+			Code: http.StatusBadRequest,
+		},
+		{
+			Method: http.MethodGet,
+			Query: map[string]interface{}{
+				"id": 1,
+			},
+			Cookie: map[string]string{
+				"session_id": initSession(),
+			},
+			ResultBody: getResponse{
+				Title:   "Get test",
+				Authors: []int{1},
+				Tags:    []string{},
+				Link:    "get-test",
+				Content: base64.StdEncoding.EncodeToString([]byte("Testing ._.")),
+			},
+			Code: http.StatusOK,
+		},
+	})
+}
+
+func TestArticlePost(t *testing.T) {
+	if err := initTestDatabase("upload_post_test.sqlite3"); err != nil {
+		t.Fatal(err)
+	}
+
+	database.GetDB().Table("article").Create([]map[string]interface{}{
+		{
+			"title":    "Upload test",
+			"summary":  "An example article to test the upload api endpoint",
+			"created":  time.Now().Unix(),
+			"link":     "upload-test",
+			"markdown": "Oh god i have to test all this, what am i doing with my life",
+			"html":     "<p>Oh god i have to test all this, what am i doing with my life<p>",
+		},
+	})
+	database.GetDB().Table("author").Create([]map[string]interface{}{
+		{
+			"name":        "me",
+			"password":    "",
+			"information": "this is my account",
+		},
+	})
+	database.GetDB().Table("article_author").Create([]map[string]interface{}{
+		{
+			"article_id": 1,
+			"author_id":  1,
+		},
+	})
+
+	server := httptest.NewServer(http.HandlerFunc(articlePost))
+	checkTestInformation(t, server.URL, []testInformation{
+		{
+			Method: http.MethodPost,
+			Code:   http.StatusUnauthorized,
+		},
+		{
+			Method: http.MethodPost,
+			Cookie: map[string]string{
+				"session_id": initSession(),
+			},
+			Body: uploadPayload{
+				Title:   "Testooo",
+				Summary: "I have no idea what to put in here",
+				Authors: []int{1},
+				Link:    "testooo",
+				Content: base64.StdEncoding.EncodeToString([]byte("### Testo")),
+			},
+			ResultBody: schema.ArticleSummary{
+				Id:      2,
+				Title:   "Testooo",
+				Summary: "I have no idea what to put in here",
+				Authors: []schema.Author{
+					{
+						Id:          1,
+						Name:        "me",
+						Information: "this is my account",
+					},
+				},
+				Tags: []string{},
+				Link: "article/testooo",
+			},
+			Code: http.StatusCreated,
+			AfterExec: func(information *testInformation) {
+				var created int64
+				database.GetDB().Table("article").Select("created").Where("id = 2").Find(&created)
+				res := information.ResultBody.(schema.ArticleSummary)
+				res.Created = created
+				information.ResultBody = res
+			},
+		},
+	})
+}
+
+func TestArticlePatch(t *testing.T) {
+	if err := initTestDatabase("edit_test.sqlite3"); err != nil {
+		t.Fatal(err)
+	}
+
+	database.GetDB().Table("article").Create([]map[string]interface{}{
+		{
+			"title":    "test article",
+			"summary":  "example summary",
+			"created":  time.Now().Unix(),
+			"link":     "test-article",
+			"markdown": "Just a simple test article",
+			"html":     "<p>Just a simple test article<p>",
+		},
+	})
+	database.GetDB().Table("author").Create([]map[string]interface{}{
+		{
+			"name":     "test",
+			"password": "",
+		},
+		{
+			"name":        "admin",
+			"password":    "123456",
+			"information": "im the admin",
+		},
+	})
+	database.GetDB().Table("article_author").Create([]map[string]interface{}{
+		{
+			"article_id": 1,
+			"author_id":  1,
+		},
+	})
+
+	server := httptest.NewServer(http.HandlerFunc(articlePatch))
+	newTitle := "New title"
+	var created int64
+	database.GetDB().Table("article").Select("created").Where("id = 1").Find(&created)
+	checkTestInformation(t, server.URL, []testInformation{
+		{
+			Method: http.MethodPost,
+			Code:   http.StatusUnauthorized,
+		},
+		{
+			Method: http.MethodPost,
+			Cookie: map[string]string{
+				"session_id": initSession(),
+			},
+			Body: editPayload{
+				Id: 69,
+			},
+			Code: http.StatusNotFound,
+		},
+		{
+			Method: http.MethodPost,
+			Cookie: map[string]string{
+				"session_id": initSession(),
+			},
+			Body: editPayload{
+				Id:    1,
+				Title: &newTitle,
+				Authors: &[]int{
+					2,
+				},
+			},
+			ResultBody: schema.ArticleSummary{
+				Id:      1,
+				Title:   "New title",
+				Summary: "example summary",
+				Authors: []schema.Author{
+					{
+						Id:   1,
+						Name: "test",
+					},
+					{
+						Id:          2,
+						Name:        "admin",
+						Information: "im the admin",
+					},
+				},
+				Created: created,
+				Tags:    []string{},
+				Link:    "article/test-article",
+			},
+			AfterExec: func(information *testInformation) {
+				var modified int64
+				database.GetDB().Table("article").Select("modified").Where("id = 1").Find(&modified)
+				res := information.ResultBody.(schema.ArticleSummary)
+				res.Modified = modified
+				information.ResultBody = res
+			},
+			Code: http.StatusOK,
+		},
+	})
+}
+
+func TestArticleDelete(t *testing.T) {
+	if err := initTestDatabase("delete_test.sqlite3"); err != nil {
+		t.Fatal(err)
+	}
+
+	database.GetDB().Table("article").Create([]map[string]interface{}{
+		{
+			"title":    "test",
+			"summary":  "test summary",
+			"image":    "https://upload.wikimedia.org/wikipedia/commons/0/05/Go_Logo_Blue.svg",
+			"created":  time.Now().Unix(),
+			"modified": time.Now().Unix(),
+			"link":     "test",
+			"markdown": "# Title",
+			"html":     "<h1>Title</h1>",
+		},
+		{
+			"title":    "owo",
+			"created":  time.Now().Unix(),
+			"link":     "owo",
+			"markdown": "owo",
+			"html":     "<p>owo<p>",
+		},
+	})
+	database.GetDB().Table("author").Create(map[string]interface{}{
+		"name":     "test",
+		"password": "",
+	})
+	database.GetDB().Table("article_author").Create([]map[string]interface{}{
+		{
+			"article_id": 1,
+			"author_id":  1,
+		},
+		{
+			"article_id": 2,
+			"author_id":  1,
+		},
+	})
+
+	server := httptest.NewServer(http.HandlerFunc(articleDelete))
+	checkTestInformation(t, server.URL, []testInformation{
+		{
+			Method: http.MethodPost,
+			Code:   http.StatusUnauthorized,
+		},
+		{
+			Method: http.MethodPost,
+			Body: deletePayload{
+				Id: 1,
+			},
+			Code: http.StatusUnauthorized,
+		},
+		{
+			Method: http.MethodPost,
+			Body: deletePayload{
+				Id: 1,
+			},
+			Cookie: map[string]string{
+				"session_id": initSession(),
+			},
+			Code: http.StatusOK,
+		},
+		{
+			Method: http.MethodPost,
+			Body: deletePayload{
+				Id: 69,
+			},
+			Cookie: map[string]string{
+				"session_id": initSession(),
+			},
+			Code: http.StatusNotFound,
+		},
+	})
+}

backend/api/assets.go

@@ -0,0 +1,140 @@
+package api
+
+import (
+	"TheAdversary/config"
+	"TheAdversary/database"
+	"TheAdversary/schema"
+	"encoding/json"
+	"gorm.io/gorm/clause"
+	"io"
+	"net/http"
+	"net/url"
+	"path"
+	"strconv"
+)
+
+var assetsPayload struct {
+	ArticleId int    `json:"article_id"`
+	Content   string `json:"content"`
+}
+
+func Assets(w http.ResponseWriter, r *http.Request) {
+	switch r.Method {
+	case http.MethodGet:
+		assetsGet(w, r)
+	case http.MethodPost:
+		assetsPost(w, r)
+	case http.MethodDelete:
+		assetsDelete(w, r)
+	}
+}
+
+func assetsGet(w http.ResponseWriter, r *http.Request) {
+	_, ok := authorizedSession(r)
+	if !ok {
+		w.WriteHeader(http.StatusUnauthorized)
+		return
+	}
+
+	query := r.URL.Query()
+	request := database.GetDB().Table("assets")
+
+	if query.Has("q") {
+		request.Where("LOWER(name) LIKE ?", "%"+query.Get("q")+"%")
+	}
+	limit := 20
+	if query.Has("limit") {
+		var err error
+		limit, err = strconv.Atoi(query.Get("limit"))
+		if err != nil {
+			ApiError{"invalid 'limit' parameter", http.StatusUnprocessableEntity}.Send(w)
+			return
+		}
+	}
+	request.Limit(limit)
+
+	var assets []schema.Asset
+	request.Find(&assets)
+
+	for _, asset := range assets {
+		asset.Link = path.Join(config.SubPath, "assets", asset.Link)
+	}
+
+	w.WriteHeader(http.StatusOK)
+	json.NewEncoder(w).Encode(&assets)
+}
+
+func assetsPost(w http.ResponseWriter, r *http.Request) {
+	_, ok := authorizedSession(r)
+	if !ok {
+		w.WriteHeader(http.StatusUnauthorized)
+		return
+	}
+
+	file, header, err := r.FormFile("file")
+	if err != nil {
+		if err == http.ErrMissingFile {
+			ApiError{Message: "file is missing", Code: http.StatusUnprocessableEntity}.Send(w)
+		} else {
+			ApiError{Message: "could not parse file" + err.Error(), Code: http.StatusInternalServerError}.Send(w)
+		}
+		return
+	}
+	defer file.Close()
+
+	var name string
+	if name = r.FormValue("name"); name == "" {
+		name = header.Filename
+	}
+
+	rawData, err := io.ReadAll(file)
+	if err != nil {
+		ApiError{Message: "failed to read file", Code: http.StatusInternalServerError}.Send(w)
+		return
+	}
+
+	tmpDatabaseSchema := struct {
+		Id   int
+		Name string
+		Data []byte
+		Link string
+	}{Name: name, Data: rawData, Link: url.PathEscape(name)}
+
+	if database.GetDB().Table("assets").Clauses(clause.OnConflict{
+		Columns:   []clause.Column{{Name: "name"}},
+		DoNothing: true,
+	}).Create(&tmpDatabaseSchema).RowsAffected == 0 {
+		w.WriteHeader(http.StatusConflict)
+	} else {
+		w.WriteHeader(http.StatusCreated)
+		json.NewEncoder(w).Encode(schema.Asset{
+			Id:   tmpDatabaseSchema.Id,
+			Name: tmpDatabaseSchema.Name,
+			Link: path.Join(config.SubPath, "assets", tmpDatabaseSchema.Link),
+		})
+	}
+}
+
+type assetsDeletePayload struct {
+	Id int `json:"id"`
+}
+
+func assetsDelete(w http.ResponseWriter, r *http.Request) {
+	_, ok := authorizedSession(r)
+	if !ok {
+		w.WriteHeader(http.StatusUnauthorized)
+		return
+	}
+
+	var payload assetsDeletePayload
+	if err := json.NewDecoder(r.Body).Decode(&payload); err != nil {
+		InvalidJson.Send(w)
+		return
+	}
+
+	if database.GetDB().Table("assets").Delete(schema.Asset{}, payload.Id).RowsAffected == 0 {
+		w.WriteHeader(http.StatusNotFound)
+	} else {
+		w.WriteHeader(http.StatusOK)
+	}
+}

backend/api/assets_test.go

@@ -0,0 +1,183 @@
+package api
+
+import (
+	"TheAdversary/database"
+	"TheAdversary/schema"
+	"bytes"
+	"fmt"
+	"mime/multipart"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+)
+
+func TestAssetsGet(t *testing.T) {
+	if err := initTestDatabase("assets_get_test.sqlite3"); err != nil {
+		t.Fatal(err)
+	}
+
+	database.GetDB().Table("assets").Create([]map[string]interface{}{
+		{
+			"name": "linux",
+			"data": "this should be an image of tux :3",
+			"link": "assets/linux",
+		},
+		{
+			"name": "get test",
+			"data": "",
+			"link": "assets/get-test",
+		},
+	})
+
+	server := httptest.NewServer(http.HandlerFunc(assetsGet))
+	checkTestInformation(t, server.URL, []testInformation{
+		{
+			Method: http.MethodGet,
+			Code:   http.StatusUnauthorized,
+		},
+		{
+			Method: http.MethodGet,
+			Cookie: map[string]string{
+				"session_id": initSession(),
+			},
+			Query: map[string]interface{}{
+				"q": "linux",
+			},
+			ResultBody: []schema.Asset{
+				{
+					Id:   1,
+					Name: "linux",
+					Link: "assets/linux",
+				},
+			},
+			Code: http.StatusOK,
+		},
+		{
+			Method: http.MethodGet,
+			Cookie: map[string]string{
+				"session_id": initSession(),
+			},
+			Query: map[string]interface{}{
+				"limit": 1,
+			},
+			ResultBody: []schema.Asset{
+				{
+					Id:   1,
+					Name: "linux",
+					Link: "assets/linux",
+				},
+			},
+			Code: http.StatusOK,
+		},
+		{
+			Method: http.MethodGet,
+			Cookie: map[string]string{
+				"session_id": initSession(),
+			},
+			ResultBody: []schema.Asset{
+				{
+					Id:   1,
+					Name: "linux",
+					Link: "assets/linux",
+				},
+				{
+					Id:   2,
+					Name: "get test",
+					Link: "assets/get-test",
+				},
+			},
+			Code: http.StatusOK,
+		},
+	})
+}
+
+func TestAssetsPost(t *testing.T) {
+	if err := initTestDatabase("assets_post_test.sqlite3"); err != nil {
+		t.Fatal(err)
+	}
+
+	var buf bytes.Buffer
+	mw := multipart.NewWriter(&buf)
+	mw.SetBoundary("test")
+	formFile, _ := mw.CreateFormFile("file", "srfwsr")
+	formFile.Write([]byte("just a test file"))
+	mw.WriteField("name", "test")
+	mw.Close()
+
+	fmt.Println(buf.String())
+
+	server := httptest.NewServer(http.HandlerFunc(assetsPost))
+	checkTestInformation(t, server.URL, []testInformation{
+		{
+			Method: http.MethodPost,
+			Code:   http.StatusUnauthorized,
+		},
+		{
+			Method: http.MethodPost,
+			Header: map[string]string{
+				"Content-Type": "multipart/form-data; boundary=test",
+			},
+			Cookie: map[string]string{
+				"session_id": initSession(),
+			},
+			Body: buf.Bytes(),
+			ResultBody: schema.Asset{
+				Id:   1,
+				Name: "test",
+				Link: "assets/test",
+			},
+			Code: http.StatusCreated,
+		},
+		{
+			Method: http.MethodPost,
+			Header: map[string]string{
+				"Content-Type": "multipart/form-data; boundary=test",
+			},
+			Cookie: map[string]string{
+				"session_id": initSession(),
+			},
+			Body: buf.Bytes(),
+			Code: http.StatusConflict,
+		},
+	})
+}
+
+func TestAssetsDelete(t *testing.T) {
+	if err := initTestDatabase("assets_delete_test.sqlite3"); err != nil {
+		t.Fatal(err)
+	}
+
+	database.GetDB().Table("assets").Create(map[string]interface{}{
+		"name": "example",
+		"data": "just a normal string",
+		"link": "assets/example",
+	})
+
+	server := httptest.NewServer(http.HandlerFunc(assetsDelete))
+	checkTestInformation(t, server.URL, []testInformation{
+		{
+			Method: http.MethodDelete,
+			Code:   http.StatusUnauthorized,
+		},
+		{
+			Method: http.MethodDelete,
+			Cookie: map[string]string{
+				"session_id": initSession(),
+			},
+			Body: assetsDeletePayload{
+				Id: 1,
+			},
+			Code: http.StatusOK,
+		},
+		{
+			Method: http.MethodDelete,
+			Cookie: map[string]string{
+				"session_id": initSession(),
+			},
+			Body: assetsDeletePayload{
+				Id: 69,
+			},
+			Code: http.StatusNotFound,
+		},
+	})
+}

backend/api/authors.go

@@ -0,0 +1,32 @@
+package api
+
+import (
+	"TheAdversary/database"
+	"TheAdversary/schema"
+	"encoding/json"
+	"net/http"
+	"strconv"
+)
+
+func Authors(w http.ResponseWriter, r *http.Request) {
+	query := r.URL.Query()
+	request := database.GetDB().Table("author")
+
+	if query.Has("name") {
+		request.Where("name LIKE ?", "%"+query.Get("name")+"%")
+	}
+	if query.Has("limit") {
+		limit, err := strconv.Atoi(query.Get("limit"))
+		if err != nil {
+			ApiError{"invalid 'limit' parameter", http.StatusUnprocessableEntity}.Send(w)
+			return
+		}
+		request.Limit(limit)
+	}
+
+	var authors []schema.Author
+	request.Find(&authors)
+
+	w.WriteHeader(http.StatusOK)
+	json.NewEncoder(w).Encode(authors)
+}

backend/api/authors_test.go

@@ -0,0 +1,55 @@
+package api
+
+import (
+	"TheAdversary/database"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+)
+
+func TestAuthors(t *testing.T) {
+	if err := initTestDatabase("authors_test.sqlite3"); err != nil {
+		t.Fatal(err)
+	}
+
+	database.GetDB().Table("author").Create([]map[string]interface{}{
+		{
+			"name":        "test",
+			"password":    "",
+			"information": "test information",
+		},
+	})
+
+	server := httptest.NewServer(http.HandlerFunc(Authors))
+	checkTestInformation(t, server.URL, []testInformation{
+		{
+			Method: http.MethodGet,
+			ResultBody: []map[string]interface{}{
+				{
+					"id":          1,
+					"name":        "test",
+					"information": "test information",
+				},
+			},
+			Code: http.StatusOK,
+		},
+		{
+			Method: http.MethodGet,
+			Query: map[string]interface{}{
+				"name": "abc",
+			},
+			ResultBody: []interface{}{},
+			Code:       http.StatusOK,
+		},
+		{
+			Method: http.MethodGet,
+			Query: map[string]interface{}{
+				"limit": "notanumber",
+			},
+			ResultBody: map[string]interface{}{
+				"message": "invalid 'limit' parameter",
+			},
+			Code: http.StatusUnprocessableEntity,
+		},
+	})
+}

backend/api/login.go

@@ -0,0 +1,50 @@
+package api
+
+import (
+	"TheAdversary/database"
+	"TheAdversary/schema"
+	"encoding/json"
+	"golang.org/x/crypto/bcrypt"
+	"math/rand"
+	"net/http"
+)
+
+type loginPayload struct {
+	Username string `json:"username"`
+	Password string `json:"password"`
+}
+
+func Login(w http.ResponseWriter, r *http.Request) {
+	var payload loginPayload
+	if err := json.NewDecoder(r.Body).Decode(&payload); err != nil {
+		InvalidJson.Send(w)
+		return
+	}
+	var author schema.Author
+	database.GetDB().Table("author").Select("id", "password").Where("name = ?", payload.Username).Take(&author)
+	if author.Id == 0 || bcrypt.CompareHashAndPassword([]byte(author.Password), []byte(payload.Password)) != nil {
+		w.WriteHeader(http.StatusUnauthorized)
+		return
+	}
+
+	sessionID := sessionId()
+
+	sessions[sessionID] = author.Id
+
+	http.SetCookie(w, &http.Cookie{
+		Name:  "session_id",
+		Value: sessionID,
+		Path:  "/",
+	})
+	w.WriteHeader(http.StatusOK)
+}
+
+func sessionId() string {
+	var letters = []rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")
+
+	s := make([]rune, 32)
+	for i := range s {
+		s[i] = letters[rand.Intn(len(letters))]
+	}
+	return string(s)
+}

backend/api/login_test.go

@@ -0,0 +1,51 @@
+package api
+
+import (
+	"TheAdversary/database"
+	"golang.org/x/crypto/bcrypt"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+)
+
+func TestLogin(t *testing.T) {
+	if err := initTestDatabase("login_test.sqlite3"); err != nil {
+		t.Fatal(err)
+	}
+
+	password, _ := bcrypt.GenerateFromPassword([]byte("super secure password"), bcrypt.DefaultCost)
+	database.GetDB().Table("author").Create([]map[string]interface{}{
+		{
+			"name":        "owner",
+			"password":    password,
+			"information": "owner of the best blog in the world",
+		},
+	})
+
+	server := httptest.NewServer(http.HandlerFunc(Login))
+	checkTestInformation(t, server.URL, []testInformation{
+		{
+			Method: http.MethodPost,
+			Body: loginPayload{
+				Username: "owner",
+				Password: "super secure password",
+			},
+			ResultCookie: []string{"session_id"},
+			Code:         http.StatusOK,
+		},
+		{
+			Method: http.MethodPost,
+			Body: loginPayload{
+				Username: "not a user",
+			},
+			Code: http.StatusUnauthorized,
+		},
+		{
+			Method: http.MethodPost,
+			Body: loginPayload{
+				Username: "test",
+			},
+			Code: http.StatusUnauthorized,
+		},
+	})
+}

backend/api/recent.go

@@ -0,0 +1,44 @@
+package api
+
+import (
+	"TheAdversary/config"
+	"TheAdversary/database"
+	"TheAdversary/schema"
+	"encoding/json"
+	"net/http"
+	"path"
+	"strconv"
+)
+
+func Recent(w http.ResponseWriter, r *http.Request) {
+	query := r.URL.Query()
+	request := database.GetDB().Table("article")
+
+	limit := 20
+	if query.Has("limit") {
+		var err error
+		limit, err = strconv.Atoi(query.Get("limit"))
+		if err != nil {
+			ApiError{"invalid 'limit' parameter", http.StatusUnprocessableEntity}.Send(w)
+			return
+		} else if limit > 100 {
+			ApiError{"'limit' parameter must not be over 100", http.StatusUnprocessableEntity}.Send(w)
+			return
+		}
+	}
+	request.Limit(limit)
+
+	var articleSummaries []schema.ArticleSummary
+	request.Find(&articleSummaries)
+
+	for i, summary := range articleSummaries {
+		database.GetDB().Table("author").Where("id IN (?)", database.GetDB().Table("article_author").Select("author_id").Where("article_id = ?", summary.Id)).Find(&summary.Authors)
+		summary.Tags = []string{}
+		database.GetDB().Table("article_tag").Select("tag").Where("article_id = ?", summary.Id).Find(&summary.Tags)
+		summary.Link = path.Join(config.SubPath, "article", summary.Link)
+		articleSummaries[i] = summary
+	}
+
+	w.WriteHeader(http.StatusOK)
+	json.NewEncoder(w).Encode(articleSummaries)
+}

backend/api/recent_test.go

@@ -0,0 +1,114 @@
+package api
+
+import (
+	"TheAdversary/database"
+	"TheAdversary/schema"
+	"net/http"
+	"net/http/httptest"
+	"path"
+	"testing"
+	"time"
+)
+
+func TestRecent(t *testing.T) {
+	if err := initTestDatabase("recent_test.sqlite3"); err != nil {
+		t.Fatal(err)
+	}
+
+	authors := []schema.Author{
+		{
+			Id:       1,
+			Name:     "user",
+			Password: "",
+		},
+	}
+	articles := []schema.ArticleSummary{
+		{
+			Id:       1,
+			Title:    "test",
+			Summary:  "test summary",
+			Authors:  authors,
+			Tags:     []string{},
+			Created:  time.Unix(0, 0).Unix(),
+			Modified: time.Now().Unix(),
+			Link:     "article/test",
+		},
+		{
+			Id:      2,
+			Title:   "Recent Article",
+			Summary: "This article is recent",
+			Authors: authors,
+			Tags:    []string{},
+			Created: time.Now().Unix(),
+			Link:    "article/recent",
+		},
+	}
+
+	database.GetDB().Table("article").Create([]map[string]interface{}{
+		{
+			"title":    articles[0].Title,
+			"summary":  articles[0].Summary,
+			"created":  articles[0].Created,
+			"modified": articles[0].Modified,
+			"link":     path.Base(articles[0].Link),
+			"markdown": "# Title",
+			"html":     "<h1>Title</h1>",
+		},
+		{
+			"title":    articles[1].Title,
+			"summary":  articles[1].Summary,
+			"created":  articles[1].Created,
+			"link":     path.Base(articles[1].Link),
+			"markdown": "This is the most recent article",
+			"html":     "<p>This is the most recent article</p>",
+		},
+	})
+	database.GetDB().Table("author").Create(authors)
+	database.GetDB().Table("article_author").Create([]map[string]interface{}{
+		{
+			"article_id": 1,
+			"author_id":  1,
+		},
+		{
+			"article_id": 2,
+			"author_id":  1,
+		},
+	})
+
+	server := httptest.NewServer(http.HandlerFunc(Recent))
+	checkTestInformation(t, server.URL, []testInformation{
+		{
+			Method:     http.MethodGet,
+			ResultBody: articles,
+			Code:       http.StatusOK,
+		},
+		{
+			Method: http.MethodGet,
+			Query: map[string]interface{}{
+				"limit": 10,
+			},
+			ResultBody: articles,
+			Code:       http.StatusOK,
+		},
+		{
+			Method: http.MethodGet,
+			Query: map[string]interface{}{
+				"limit": 1001,
+			},
+			ResultBody: map[string]interface{}{
+				"message": "'limit' parameter must not be over 100",
+			},
+			Code: http.StatusUnprocessableEntity,
+		},
+		{
+			Method: http.MethodGet,
+			Query: map[string]interface{}{
+				"limit": "notanumber",
+			},
+			ResultBody: map[string]interface{}{
+				"message": "invalid 'limit' parameter",
+			},
+			Code: http.StatusUnprocessableEntity,
+		},
+	})
+}

backend/api/search.go

@@ -0,0 +1,81 @@
+package api
+
+import (
+	"TheAdversary/config"
+	"TheAdversary/database"
+	"TheAdversary/schema"
+	"encoding/json"
+	"net/http"
+	"path"
+	"strconv"
+	"strings"
+)
+
+func Search(w http.ResponseWriter, r *http.Request) {
+	query := r.URL.Query()
+	request := database.GetDB().Table("article")
+
+	if query.Has("q") {
+		request.Where("LOWER(title) LIKE ?", "%"+query.Get("q")+"%")
+	}
+	if query.Has("from") {
+		from, err := strconv.ParseInt(query.Get("from"), 10, 64)
+		if err != nil {
+			ApiError{"invalid 'from' parameter", http.StatusUnprocessableEntity}.Send(w)
+			return
+		}
+		request.Where("created >= ?", from).Or("modified >= ?", from)
+	}
+	if query.Has("to") {
+		to, err := strconv.ParseInt(query.Get("to"), 10, 64)
+		if err != nil {
+			ApiError{"invalid 'to' parameter", http.StatusUnprocessableEntity}.Send(w)
+			return
+		}
+		request.Where("created <= ?", to).Or("modified <= ?", to)
+	}
+	if query.Has("authors") {
+		var authorIds []int
+		if err := json.NewDecoder(strings.NewReader(query.Get("authors"))).Decode(&authorIds); err != nil {
+			ApiError{"could not parse 'authors' parameter as array of integers / numbers", http.StatusUnprocessableEntity}.Send(w)
+			return
+		}
+		request.Where("id IN (?)", database.GetDB().Table("article_author").Select("article_id").Where("author_id IN (?)", authorIds))
+	}
+	if query.Has("tags") {
+		var tags []string
+		if err := json.NewDecoder(strings.NewReader(query.Get("tags"))).Decode(&tags); err != nil {
+			ApiError{"could not parse 'tags' parameter as array of strings", http.StatusUnprocessableEntity}.Send(w)
+			return
+		}
+		authorRequest := database.GetDB().Table("article_tag").Select("article_id").Where("tag IN ?", tags)
+		request.Where("id IN (?)", authorRequest)
+	}
+	limit := 20
+	if query.Has("limit") {
+		var err error
+		limit, err = strconv.Atoi(query.Get("limit"))
+		if err != nil {
+			ApiError{"invalid 'limit' parameter", http.StatusUnprocessableEntity}.Send(w)
+			return
+		} else if limit > 100 {
+			ApiError{"'limit' parameter must not be over 100", http.StatusUnprocessableEntity}.Send(w)
+			return
+		}
+	}
+	request.Limit(limit)
+
+	var articleSummaries []schema.ArticleSummary
+	request.Find(&articleSummaries)
+
+	for i, summary := range articleSummaries {
+		database.GetDB().Table("author").Where("id IN (?)", database.GetDB().Table("article_author").Select("author_id").Where("article_id = ?", summary.Id)).Find(&summary.Authors)
+		summary.Tags = []string{}
+		database.GetDB().Table("article_tag").Select("tag").Where("article_id = ?", summary.Id).Find(&summary.Tags)
+		summary.Link = path.Join(config.SubPath, "article", summary.Link)
+		articleSummaries[i] = summary
+	}
+
+	w.WriteHeader(http.StatusOK)
+	json.NewEncoder(w).Encode(articleSummaries)
+}

backend/api/search_test.go

@@ -0,0 +1,231 @@
+package api
+
+import (
+	"TheAdversary/database"
+	"TheAdversary/schema"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+	"time"
+)
+
+func TestSearch(t *testing.T) {
+	if err := initTestDatabase("search_test.sqlite3"); err != nil {
+		t.Fatal(err)
+	}
+
+	now := time.Now()
+
+	database.GetDB().Table("article").Create([]map[string]interface{}{
+		{
+			"title":    "First article",
+			"created":  now.Unix(),
+			"link":     "first-article",
+			"markdown": "This is my first article",
+			"html":     "<p>This is my first article</p>",
+		},
+		{
+			"title":    "test",
+			"summary":  "test summary",
+			"image":    "https://upload.wikimedia.org/wikipedia/commons/0/05/Go_Logo_Blue.svg",
+			"created":  now.Unix(),
+			"modified": now.Add(24 * time.Hour).Unix(),
+			"link":     "test",
+			"markdown": "# Title",
+			"html":     "<h1>Title</h1>",
+		},
+		{
+			"title":    "owo",
+			"created":  now.Unix(),
+			"modified": now.Add(12 * time.Hour).Unix(),
+			"link":     "owo",
+			"markdown": "owo",
+			"html":     "<p>owo<p>",
+		},
+	})
+	database.GetDB().Table("author").Create([]map[string]interface{}{
+		{
+			"name":     "test",
+			"password": "",
+		},
+		{
+			"name":     "hacr",
+			"password": "1234567890",
+		},
+	})
+	database.GetDB().Table("article_tag").Create([]map[string]interface{}{
+		{
+			"article_id": 1,
+			"tag":        "example",
+		},
+	})
+	database.GetDB().Table("article_author").Create([]map[string]interface{}{
+		{
+			"article_id": 1,
+			"author_id":  1,
+		},
+		{
+			"article_id": 2,
+			"author_id":  1,
+		},
+		{
+			"article_id": 3,
+			"author_id":  2,
+		},
+	})
+
+	server := httptest.NewServer(http.HandlerFunc(Search))
+	checkTestInformation(t, server.URL, []testInformation{
+		{
+			Method: http.MethodGet,
+			Query: map[string]interface{}{
+				"q": "first",
+			},
+			ResultBody: []schema.ArticleSummary{
+				{
+					Id:      1,
+					Title:   "First article",
+					Created: now.Unix(),
+					Authors: []schema.Author{
+						{
+							Id:   1,
+							Name: "test",
+						},
+					},
+					Tags: []string{
+						"example",
+					},
+					Link: "article/first-article",
+				},
+			},
+			Code: http.StatusOK,
+		},
+		{
+			Method: http.MethodGet,
+			Query: map[string]interface{}{
+				"from": now.Add(1 * time.Hour).Unix(),
+				"to":   now.Add(10 * time.Hour).Unix(),
+			},
+			ResultBody: []schema.ArticleSummary{
+				{
+					Id:      2,
+					Title:   "test",
+					Summary: "test summary",
+					Authors: []schema.Author{
+						{
+							Id:   1,
+							Name: "test",
+						},
+					},
+					Image:    "https://upload.wikimedia.org/wikipedia/commons/0/05/Go_Logo_Blue.svg",
+					Created:  now.Unix(),
+					Modified: now.Add(24 * time.Hour).Unix(),
+					Tags:     []string{},
+					Link:     "article/test",
+				},
+				{
+					Id:    3,
+					Title: "owo",
+					Authors: []schema.Author{
+						{
+							Id:   2,
+							Name: "hacr",
+						},
+					},
+					Created:  now.Unix(),
+					Modified: now.Add(12 * time.Hour).Unix(),
+					Tags:     []string{},
+					Link:     "article/owo",
+				},
+			},
+			Code: http.StatusOK,
+		},
+		{
+			Method: http.MethodGet,
+			Query: map[string]interface{}{
+				"authors": []int{2},
+			},
+			ResultBody: []schema.ArticleSummary{
+				{
+					Id:    3,
+					Title: "owo",
+					Authors: []schema.Author{
+						{
+							Id:   2,
+							Name: "hacr",
+						},
+					},
+					Created:  now.Unix(),
+					Modified: now.Add(12 * time.Hour).Unix(),
+					Tags:     []string{},
+					Link:     "article/owo",
+				},
+			},
+			Code: http.StatusOK,
+		},
+		{
+			Method: http.MethodGet,
+			Query: map[string]interface{}{
+				"tags": []string{"\"example\""},
+			},
+			ResultBody: []schema.ArticleSummary{
+				{
+					Id:    1,
+					Title: "First article",
+					Authors: []schema.Author{
+						{
+							Id:   1,
+							Name: "test",
+						},
+					},
+					Created: now.Unix(),
+					Tags: []string{
+						"example",
+					},
+					Link: "article/first-article",
+				},
+			},
+			Code: http.StatusOK,
+		},
+		{
+			Method: http.MethodGet,
+			Query: map[string]interface{}{
+				"limit": 2,
+			},
+			ResultBody: []schema.ArticleSummary{
+				{
+					Id:    1,
+					Title: "First article",
+					Authors: []schema.Author{
+						{
+							Id:   1,
+							Name: "test",
+						},
+					},
+					Created: now.Unix(),
+					Tags: []string{
+						"example",
+					},
+					Link: "article/first-article",
+				},
+				{
+					Id:      2,
+					Title:   "test",
+					Summary: "test summary",
+					Authors: []schema.Author{
+						{
+							Id:   1,
+							Name: "test",
+						},
+					},
+					Image:    "https://upload.wikimedia.org/wikipedia/commons/0/05/Go_Logo_Blue.svg",
+					Created:  now.Unix(),
+					Modified: now.Add(24 * time.Hour).Unix(),
+					Tags:     []string{},
+					Link:     "article/test",
+				},
+			},
+			Code: http.StatusOK,
+		},
+	})
+}

backend/api/tags.go

@@ -0,0 +1,31 @@
+package api
+
+import (
+	"TheAdversary/database"
+	"encoding/json"
+	"net/http"
+	"strconv"
+)
+
+func Tags(w http.ResponseWriter, r *http.Request) {
+	query := r.URL.Query()
+	request := database.GetDB().Table("article_tag")
+
+	if query.Has("name") {
+		request.Where("tag LIKE ?", "%"+query.Get("name")+"%")
+	}
+	if query.Has("limit") {
+		limit, err := strconv.Atoi(query.Get("limit"))
+		if err != nil {
+			ApiError{"invalid 'limit' parameter", http.StatusUnprocessableEntity}.Send(w)
+			return
+		}
+		request.Limit(limit)
+	}
+
+	tags := make([]string, 0)
+	request.Distinct("tag").Find(&tags)
+
+	w.WriteHeader(http.StatusOK)
+	json.NewEncoder(w).Encode(tags)
+}

backend/api/tags_test.go

@@ -0,0 +1,81 @@
+package api
+
+import (
+	"TheAdversary/database"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+	"time"
+)
+
+func TestTags(t *testing.T) {
+	if err := initTestDatabase("tags_test.sqlite3"); err != nil {
+		t.Fatal(err)
+	}
+
+	tags := []string{
+		"test",
+		"linux",
+	}
+
+	database.GetDB().Table("article").Create([]map[string]interface{}{
+		{
+			"title":    "Upload test",
+			"summary":  "An example article to test the upload api endpoint",
+			"created":  time.Now().Unix(),
+			"link":     "article/upload-test",
+			"markdown": "Oh god i have to test all this, what am i doing with my life",
+			"html":     "<p>Oh god i have to test all this, what am i doing with my life<p>",
+		},
+	})
+	database.GetDB().Table("author").Create([]map[string]interface{}{
+		{
+			"name":        "me",
+			"password":    "",
+			"information": "this is my account",
+		},
+	})
+	database.GetDB().Table("article_author").Create([]map[string]interface{}{
+		{
+			"article_id": 1,
+			"author_id":  1,
+		},
+	})
+	database.GetDB().Table("article_tag").Create([]map[string]interface{}{
+		{
+			"article_id": 1,
+			"tag":        "test",
+		},
+		{
+			"article_id": 1,
+			"tag":        "linux",
+		},
+	})
+
+	server := httptest.NewServer(http.HandlerFunc(Tags))
+	checkTestInformation(t, server.URL, []testInformation{
+		{
+			Method:     http.MethodGet,
+			ResultBody: tags,
+			Code:       http.StatusOK,
+		},
+		{
+			Method: http.MethodGet,
+			Query: map[string]interface{}{
+				"name": "abc",
+			},
+			ResultBody: []interface{}{},
+			Code:       http.StatusOK,
+		},
+		{
+			Method: http.MethodGet,
+			Query: map[string]interface{}{
+				"limit": "notanumber",
+			},
+			ResultBody: map[string]interface{}{
+				"message": "invalid 'limit' parameter",
+			},
+			Code: http.StatusUnprocessableEntity,
+		},
+	})
+}

backend/config/config.go

@@ -0,0 +1,28 @@
+package config
+
+import (
+	"github.com/joho/godotenv"
+	"os"
+)
+
+var (
+	ServerPort string
+
+	Address string
+	SubPath string
+
+	DatabaseFile string
+	FrontendDir  string
+)
+
+func init() {
+	godotenv.Load()
+
+	ServerPort = os.Getenv("SERVER_PORT")
+
+	Address = os.Getenv("ADDRESS")
+	SubPath = os.Getenv("SUBPATH")
+
+	DatabaseFile = os.Getenv("DATABASE_FILE")
+	FrontendDir = os.Getenv("FRONTEND_DIR")
+}

backend/database.sql

@@ -0,0 +1,68 @@
+create table article
+(
+    id       integer
+        constraint article_pk
+            primary key autoincrement,
+    title    text    not null,
+    summary  text,
+    image    text,
+    created  integer not null,
+    modified integer default 0,
+    link     text    not null,
+    markdown text    not null,
+    html     text    not null
+);
+
+create unique index article_link_uindex
+    on article (link);
+
+create unique index article_title_uindex
+    on article (title);
+
+create table article_tag
+(
+    article_id integer not null
+        references article
+            on delete cascade,
+    tag        text
+);
+
+create table assets
+(
+    id   integer
+        constraint assets_pk
+            primary key autoincrement,
+    name text   not null,
+    data blob   not null,
+    link string not null
+);
+
+create unique index assets_link_uindex
+    on assets (link);
+
+create unique index assets_name_uindex
+    on assets (name);
+
+create table author
+(
+    id          integer
+        constraint author_pk
+            primary key autoincrement,
+    name        text not null,
+    password    text not null,
+    information text
+);
+
+create table article_author
+(
+    article_id integer not null
+        references article
+            on delete cascade,
+    author_id  integer not null
+        references author
+            on delete cascade
+);
+
+create unique index author_name_uindex
+    on author (name);
+

backend/database/database.go

@@ -0,0 +1,24 @@
+package database
+
+import (
+	"gorm.io/driver/sqlite"
+	"gorm.io/gorm"
+)
+
+var globDatabase *gorm.DB
+
+func newDatabaseConnection(dialector gorm.Dialector) (*gorm.DB, error) {
+	return gorm.Open(dialector)
+}
+
+func NewSqlite3Connection(databaseFile string) (*gorm.DB, error) {
+	return newDatabaseConnection(sqlite.Open(databaseFile))
+}
+
+func GetDB() *gorm.DB {
+	return globDatabase
+}
+
+func SetGlobDB(database *gorm.DB) {
+	globDatabase = database
+}

backend/database/schema.go

@@ -0,0 +1,13 @@
+package database
+
+type Article struct {
+	Id       int `gorm:"primaryKey"`
+	Title    string
+	Summary  string
+	Image    string
+	Created  int64
+	Modified int64
+	Link     string
+	Markdown string
+	Html     string
+}

backend/database/utils.go

@@ -0,0 +1,9 @@
+package database
+
+import "gorm.io/gorm"
+
+func Exists(tx *gorm.DB, query interface{}, args ...interface{}) bool {
+	var exists bool
+	tx.Where(query, args...).Select("count(*) > 0").Find(&exists)
+	return exists
+}

backend/go.mod

@@ -0,0 +1,22 @@
+module TheAdversary
+
+go 1.17
+
+require (
+	github.com/gomarkdown/markdown v0.0.0-20211207152620-5d6539fd8bfc
+	github.com/gorilla/mux v1.8.0
+	github.com/joho/godotenv v1.4.0
+	go.uber.org/zap v1.19.1
+	gorm.io/driver/sqlite v1.2.6
+	gorm.io/gorm v1.22.4
+)
+
+require (
+	github.com/jinzhu/inflection v1.0.0 // indirect
+	github.com/jinzhu/now v1.1.3 // indirect
+	github.com/mattn/go-sqlite3 v1.14.9 // indirect
+	go.uber.org/atomic v1.7.0 // indirect
+	go.uber.org/multierr v1.6.0 // indirect
+	golang.org/x/crypto v0.0.0-20220112180741-5e0467b6c7ce // indirect
+	golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1 // indirect
+)

backend/go.sum

@@ -0,0 +1,82 @@
+github.com/benbjohnson/clock v1.1.0 h1:Q92kusRqC1XV2MjkWETPvjJVqKetz1OzxZB7mHJLju8=
+github.com/benbjohnson/clock v1.1.0/go.mod h1:J11/hYXuz8f4ySSvYwY0FKfm+ezbsZBKZxNJlLklBHA=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/fsnotify/fsnotify v1.4.9 h1:hsms1Qyu0jgnwNXIxa+/V/PDsU6CfLf6CNO8H7IWoS4=
+github.com/fsnotify/fsnotify v1.4.9/go.mod h1:znqG4EE+3YCdAaPaxE2ZRY/06pZUdp0tY4IgpuI1SZQ=
+github.com/gomarkdown/markdown v0.0.0-20211207152620-5d6539fd8bfc h1:mmMAHzJGtMsCaDyRgPNMO6cbSzeKCZxHTA1Sn/wirko=
+github.com/gomarkdown/markdown v0.0.0-20211207152620-5d6539fd8bfc/go.mod h1:JDGcbDT52eL4fju3sZ4TeHGsQwhG9nbDV21aMyhwPoA=
+github.com/gorilla/mux v1.8.0 h1:i40aqfkR1h2SlN9hojwV5ZA91wcXFOvkdNIeFDP5koI=
+github.com/gorilla/mux v1.8.0/go.mod h1:DVbg23sWSpFRCP0SfiEN6jmj59UnW/n46BH5rLB71So=
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+github.com/jinzhu/now v1.1.3 h1:PlHq1bSCSZL9K0wUhbm2pGLoTWs2GwVhsP6emvGV/ZI=
+github.com/jinzhu/now v1.1.3/go.mod h1:d3SSVoowX0Lcu0IBviAWJpolVfI5UJVZZ7cO71lE/z8=
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+github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
+github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
+github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
+github.com/mattn/go-sqlite3 v1.14.9 h1:10HX2Td0ocZpYEjhilsuo6WWtUqttj2Kb0KtD86/KYA=
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+github.com/pkg/errors v0.8.1 h1:iURUrRGxPUNPdy5/HRSm+Yj6okJ6UtLINN0Q9M4+h3I=
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backend/main.go

@@ -0,0 +1,82 @@
+package main
+
+import (
+	"TheAdversary/api"
+	"TheAdversary/config"
+	"TheAdversary/database"
+	"TheAdversary/server"
+	"fmt"
+	"github.com/gorilla/mux"
+	"html/template"
+	"net/http"
+	"path"
+	"path/filepath"
+	"strings"
+)
+
+func main() {
+	r := mux.NewRouter()
+	r.StrictSlash(true)
+
+	var subrouter *mux.Router
+	if config.SubPath != "" {
+		subrouter = r.PathPrefix(config.SubPath).Subrouter()
+	} else {
+		subrouter = r
+	}
+
+	setupApi(subrouter)
+	setupFrontend(subrouter)
+
+	db, err := database.NewSqlite3Connection(config.DatabaseFile)
+	if err != nil {
+		panic(err)
+	}
+	database.SetGlobDB(db)
+
+	if err := http.ListenAndServe(fmt.Sprintf(":%s", config.ServerPort), r); err != nil {
+		panic(err)
+	}
+}
+
+func setupApi(r *mux.Router) {
+	r.HandleFunc("/api/login", api.Login).Methods(http.MethodPost)
+
+	r.HandleFunc("/api/authors", api.Authors).Methods(http.MethodGet)
+	r.HandleFunc("/api/tags", api.Tags).Methods(http.MethodGet)
+
+	r.HandleFunc("/api/recent", api.Recent).Methods(http.MethodGet)
+	r.HandleFunc("/api/search", api.Search).Methods(http.MethodGet)
+
+	r.HandleFunc("/api/article", api.Article).Methods(http.MethodGet, http.MethodPost, http.MethodPatch, http.MethodDelete)
+
+	r.HandleFunc("/api/assets", api.Assets).Methods(http.MethodGet, http.MethodPost, http.MethodDelete)
+
+	r.MethodNotAllowedHandler = http.Handler(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		api.ApiError{Message: "invalid method", Code: http.StatusNotFound}.Send(w)
+	}))
+	r.NotFoundHandler = http.Handler(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		api.ApiError{Message: "invalid endpoint", Code: http.StatusNotFound}.Send(w)
+	}))
+}
+
+func setupFrontend(r *mux.Router) {
+	r.HandleFunc("/article/{article}", server.Article).Methods(http.MethodGet)
+	r.HandleFunc("/assets/{asset}", server.Assets).Methods(http.MethodGet)
+
+	r.PathPrefix("/css/").HandlerFunc(server.ServePath).Methods(http.MethodGet)
+	r.PathPrefix("/img/").HandlerFunc(server.ServePath).Methods(http.MethodGet)
+	r.PathPrefix("/js/").HandlerFunc(server.ServePath).Methods(http.MethodGet)
+	r.PathPrefix("/html/").HandlerFunc(server.ServePath).Methods(http.MethodGet)
+
+	landingpage := template.Must(template.ParseFiles(filepath.Join(config.FrontendDir, "html", "landingpage.gohtml")))
+	r.Path("/").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		landingpage.Execute(w, struct {
+			BasePath string
+		}{BasePath: config.Address + strings.TrimSuffix(path.Join("/", config.SubPath), "/") + "/"})
+	}).Methods(http.MethodGet)
+
+	r.NotFoundHandler = http.Handler(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		server.Error404(w, r)
+	}))
+}

backend/parse/parse.go

@@ -0,0 +1,25 @@
+package parse
+
+import (
+	"github.com/gomarkdown/markdown"
+	"github.com/gomarkdown/markdown/html"
+	"github.com/gomarkdown/markdown/parser"
+)
+
+func newParser() *parser.Parser {
+	extensions := parser.CommonExtensions | parser.AutoHeadingIDs
+
+	return parser.NewWithExtensions(extensions)
+}
+
+func newHtmlRenderer() *html.Renderer {
+	renderOpts := html.RendererOptions{
+		Flags: html.CommonFlags | html.LazyLoadImages,
+	}
+	return html.NewRenderer(renderOpts)
+}
+
+func ParseToHtml(rawMarkdown []byte) []byte {
+	node := markdown.Parse(rawMarkdown, newParser())
+	return markdown.Render(node, newHtmlRenderer())
+}

backend/schema/schema.go

@@ -0,0 +1,26 @@
+package schema
+
+type ArticleSummary struct {
+	Id       int      `json:"id" gorm:"primaryKey"`
+	Title    string   `json:"title"`
+	Summary  string   `json:"summary"`
+	Authors  []Author `json:"authors" gorm:"-"`
+	Image    string   `json:"image"`
+	Tags     []string `json:"tags" gorm:"-"`
+	Created  int64    `json:"created"`
+	Modified int64    `json:"modified"`
+	Link     string   `json:"link"`
+}
+
+type Author struct {
+	Id          int    `json:"id" gorm:"primaryKey"`
+	Name        string `json:"name"`
+	Password    string `json:"-"`
+	Information string `json:"information"`
+}
+
+type Asset struct {
+	Id   int    `json:"id"`
+	Name string `json:"name"`
+	Link string `json:"link"`
+}

backend/server/article.go

@@ -0,0 +1,61 @@
+package server
+
+import (
+	"TheAdversary/config"
+	"TheAdversary/database"
+	"github.com/gorilla/mux"
+	"net/http"
+	"path"
+	"path/filepath"
+	"text/template"
+	"time"
+)
+
+var tmpl = template.Must(template.ParseFiles(filepath.Join(config.FrontendDir, "html", "article.gohtml")))
+
+type tmplArticle struct {
+	Title    string
+	BasePath string
+	Summary  string
+	Image    string
+	Authors  []string
+	Tags     []string
+	Date     string
+	Modified bool
+	Content  string
+}
+
+func Article(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("Content-Type", "text/html")
+
+	articleName := mux.Vars(r)["article"]
+	var article database.Article
+	if database.GetDB().Table("article").Where("link = ?", articleName).First(&article).RowsAffected == 0 {
+		Error404(w, r)
+	} else if database.GetDB().Error != nil {
+		Error500(w, r)
+	} else {
+		var authors, tags []string
+		database.GetDB().Table("author").Select("name").Where("id IN (?)", database.GetDB().Table("article_author").Select("author_id").Where("article_id = ?", article.Id)).Find(&authors)
+		database.GetDB().Table("article_tag").Where("article_id = ?", article.Id).Find(&tags)
+
+		ta := tmplArticle{
+			Title:    article.Title,
+			BasePath: config.Address + path.Join("/", config.SubPath) + "/",
+			Summary:  article.Summary,
+			Image:    article.Image,
+			Authors:  authors,
+			Tags:     tags,
+			Content:  article.Html,
+		}
+		if article.Modified > 0 {
+			ta.Date = time.Unix(article.Modified, 0).Format("Monday, 2. January 2006 | 15:04")
+			ta.Modified = true
+		} else {
+			ta.Date = time.Unix(article.Created, 0).Format("Monday, 2. January 2006 | 15:04")
+		}
+
+		w.WriteHeader(http.StatusOK)
+		tmpl.Execute(w, ta)
+	}
+}

backend/server/assets.go

@@ -0,0 +1,23 @@
+package server
+
+import (
+	"TheAdversary/database"
+	"github.com/gorilla/mux"
+	"mime"
+	"net/http"
+	"path"
+)
+
+func Assets(w http.ResponseWriter, r *http.Request) {
+	assetName := mux.Vars(r)["asset"]
+	var buf []interface{}
+	database.GetDB().Table("assets").Select("data").Find(&buf, "link = ?", assetName)
+
+	if buf == nil {
+		Error404(w, r)
+	} else {
+		data := buf[0].([]byte)
+		w.Header().Set("Content-Type", mime.TypeByExtension(path.Ext(assetName)))
+		w.Write(data)
+	}
+}

backend/server/error.go

@@ -0,0 +1,25 @@
+package server
+
+import (
+	"TheAdversary/config"
+	"io"
+	"log"
+	"net/http"
+	"path/filepath"
+)
+
+func init() {
+	// disable default log output because http.ServeFile prints
+	// a message if a header is written 2 times or more
+	log.Default().SetOutput(io.Discard)
+}
+
+func Error404(w http.ResponseWriter, r *http.Request) {
+	w.WriteHeader(http.StatusNotFound)
+	http.ServeFile(w, r, filepath.Join(config.FrontendDir, "error", "404.html"))
+}
+
+func Error500(w http.ResponseWriter, r *http.Request) {
+	w.WriteHeader(http.StatusInternalServerError)
+	http.ServeFile(w, r, filepath.Join(config.FrontendDir, "error", "500.html"))
+}

backend/server/landingpage.go

@@ -0,0 +1 @@
+package server

backend/server/path.go

@@ -0,0 +1,18 @@
+package server
+
+import (
+	"TheAdversary/config"
+	"net/http"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+func ServePath(w http.ResponseWriter, r *http.Request) {
+	path := filepath.Join(config.FrontendDir, strings.TrimPrefix(r.URL.Path, config.SubPath))
+	if _, err := os.Stat(path); os.IsNotExist(err) {
+		Error404(w, r)
+	} else {
+		http.ServeFile(w, r, path)
+	}
+}