adding permissions layer

backend/src/db/schema.ts

@@ -10,7 +10,8 @@ import {
   unique,
   boolean,
   smallint,
-  check
+  check,
+  foreignKey
 } from "drizzle-orm/pg-core";
 import { sql, defineRelations } from "drizzle-orm";
 
@@ -42,11 +43,26 @@ export const articles = pgTable("articles", {
   date_created: timestamp({ mode: "date", withTimezone: true }).defaultNow().notNull(),
   last_edit: timestamp({ mode: "date", withTimezone: true }).defaultNow().notNull(),
   date_published: timestamp({ mode: "date", withTimezone: true }),
+
+  previous_article: uuid(),
+  next_article: uuid()
 },
-  (table) => [{
-    slugIdx: unique("no_repeat_slugs_per_author")
-      .on(table.author_id, table.slug)
-  }]);
+  (table) => [
+    unique("no_repeat_slugs_per_author")
+      .on(table.author_id, table.slug),
+
+    foreignKey({
+      name: "next_article_ref_id",
+      columns: [table.next_article],
+      foreignColumns: [table.id]
+    }),
+
+    foreignKey({
+      name: "previous_article_ref_id",
+      columns: [table.previous_article],
+      foreignColumns: [table.id]
+    })
+  ]);
 
 export const articleBlocks = pgTable("article_blocks", {
   id: uuid().notNull().primaryKey().defaultRandom(),

backend/src/helpers/authenticate.ts

@@ -0,0 +1,17 @@
+import { Request, Response, NextFunction } from "express";
+import JsonWebToken from '../types/JsonWebToken.ts';
+
+export enum Permission {
+  read = 1,
+  write = 2,
+  delete = 4
+};
+
+export function requirePermissions(permission: number, isOwner: Boolean, requiredPermissions: number): Boolean {
+  const mask = isOwner ?
+    Math.floor(permission / 10) :
+    permission % 10;
+
+  return (mask & requiredPermissions) === requiredPermissions;
+
+};

backend/src/routes/articles.ts

@@ -2,6 +2,7 @@ import { drizzle } from 'drizzle-orm/node-postgres';
 import { eq } from 'drizzle-orm';
 import { articles } from '../db/schema.ts';
 import express, { Request, Response } from "express";
+import { Permission, requirePermissions } from '../helpers/authenticate.ts';
 
 const db = drizzle(process.env.DATABASE_URL!);
 export const articlesRouter = express.Router();
@@ -18,6 +19,17 @@ articlesRouter.get("/getArticle/:articleId", async (req: Request, res: Response)
   const resp = await db.select()
     .from(articles)
     .where(eq(articles.id, parsedId));
+
+  if (!requirePermissions(
+    req.jwt.payload.prm,
+    req.jwt.payload.uid === resp[0].author_id,
+    Permission.read)) {
+
+    res.status(403).json({
+      error: "Insufficient Permissions"
+    });
+  };
+
   res.json(resp);
 });
 
@@ -47,11 +59,7 @@ articlesRouter.put("/updateArticle/:articleId", async (req: Request, res: Respon
 
   const resp = await db.update(articles)
     .set({
-      name: req.body.name,
-      author_id: req.body.author_id,
-      slug: req.body.name.trim().toLowerCase().replace(/\s+/g, '-').replace(/[^\w-]/g, ''),
-      summary: req.body.summary,
-      article_status: req.body.article_status,
+      ...req.body,
       last_edit: new Date(Date.now()),
       date_published: req.body.article_status == "published" ? new Date(Date.now()) : null
     })

backend/src/routes/auth.ts

@@ -58,7 +58,7 @@ authRouter.post("/signup", async (req: Request, res: Response) => {
         display_name: display_name,
         username: username,
         hashed_password: hashedPassword,
-        permissions: 44
+        permissions: 71
       });
   } catch (err: any) {
     if (err.cause.code === "23505") {