add admin admin settings

src/lib/permissions.ts

@@ -0,0 +1,56 @@
+export class Permissions {
+	static readonly AdminRead = 2;
+	static readonly AdminWrite = 4;
+	static readonly UserRead = 8;
+	static readonly UserWrite = 16;
+
+	readonly value: number;
+
+	constructor(value: number | number[]) {
+		if (typeof value == 'number') {
+			this.value = value;
+		} else {
+			let finalValue = 0;
+			for (const v of Object.values(value)) {
+				finalValue |= v;
+			}
+			this.value = finalValue;
+		}
+	}
+
+	toJSON() {
+		return this.value;
+	}
+
+	static allPermissions(): number[] {
+		return [
+			Permissions.AdminRead,
+			Permissions.AdminWrite,
+			Permissions.UserRead,
+			Permissions.UserWrite
+		];
+	}
+
+	adminRead(): boolean {
+		return (this.value & Permissions.AdminRead) != 0;
+	}
+	adminWrite(): boolean {
+		return (this.value & Permissions.AdminWrite) != 0;
+	}
+	userRead(): boolean {
+		return (this.value & Permissions.UserRead) != 0;
+	}
+	userWrite(): boolean {
+		return (this.value & Permissions.UserWrite) != 0;
+	}
+
+	asArray(): number[] {
+		const array = [];
+		for (const perm of Permissions.allPermissions()) {
+			if ((this.value & perm) != 0) {
+				array.push(perm);
+			}
+		}
+		return array;
+	}
+}