Updated database for requests

src/lib/dataaccess/User.ts

@@ -61,6 +61,25 @@ export class User extends DataObject {
         return new Date(this.$joinedAt);
     }
 
+    /**
+     * Returns all friends of the user.
+     */
+    public async friends(): Promise<User[]> {
+        const result = await queryHelper.all({
+            text: "SELECT * FROM user_friends WHERE user_id = $1 OR friend_id = $1",
+            values: [this.id],
+        });
+        const userFriends = [];
+        for (const row of result) {
+            if (row.user_id === this.id) {
+                userFriends.push(new User(row.friend_id));
+            } else {
+                userFriends.push(new User(row.user_id));
+            }
+        }
+        return userFriends;
+    }
+
     /**
      * Returns all posts for a user.
      */

src/lib/dataaccess/index.ts

@@ -41,8 +41,8 @@ namespace dataaccess {
      * Initializes everything that needs to be initialized asynchronous.
      */
     export async function init() {
-        await queryHelper.updateTableDefinitions();
         await queryHelper.createTables();
+        await queryHelper.updateTableDefinitions();
     }
 
     /**

src/routes/home.ts

@@ -135,7 +135,7 @@ class HomeRoute extends Route {
                         return await (new Post(postId)).vote(req.session.userId, type);
                     } else {
                         res.status(status.UNAUTHORIZED);
-                        return new GraphQLError("Not logged in.");
+                        return new NotLoggedInGqlError();
                     }
                 } else {
                     res.status(status.BAD_REQUEST);
@@ -148,7 +148,7 @@ class HomeRoute extends Route {
                         return await dataaccess.createPost(content, req.session.userId);
                     } else {
                         res.status(status.UNAUTHORIZED);
-                        return new GraphQLError("Not logged in.");
+                        return new NotLoggedInGqlError();
                     }
                 } else {
                     res.status(status.BAD_REQUEST);

src/sql/create-tables.sql

@@ -1,3 +1,56 @@
+--create functions
+DO $$BEGIN
+
+    IF NOT EXISTS(SELECT 1 from pg_proc WHERE proname = 'function_exists') THEN
+        CREATE FUNCTION function_exists(text) RETURNS boolean LANGUAGE plpgsql AS $BODY$
+        BEGIN
+            RETURN EXISTS(SELECT 1 from pg_proc WHERE proname = $1);
+        END $BODY$;
+    END IF;
+
+    IF NOT function_exists('type_exists') THEN
+        CREATE FUNCTION type_exists(text) RETURNS boolean LANGUAGE plpgsql AS $BODY$
+        BEGIN
+            RETURN EXISTS (SELECT 1 FROM pg_type WHERE typname = $1);
+        END $BODY$;
+    END IF;
+
+    IF NOT function_exists('cast_to_votetype') THEN
+        CREATE FUNCTION cast_to_votetype(text) RETURNS votetype LANGUAGE plpgsql AS $BODY$
+        BEGIN
+            RETURN CASE WHEN $1::votetype IS NULL THEN 'UPVOTE' ELSE $1::votetype END;
+        END $BODY$;
+    END IF;
+
+    IF NOT function_exists('cast_to_posttype') THEN
+        CREATE FUNCTION cast_to_posttype(text) RETURNS posttype LANGUAGE plpgsql AS $BODY$
+        BEGIN
+            RETURN CASE WHEN $1::posttype IS NULL THEN 'MISC' ELSE $1::posttype END;
+        END $BODY$;
+    END IF;
+
+END$$;
+
+--create types
+DO $$ BEGIN
+
+    IF NOT type_exists('votetype') THEN
+        CREATE TYPE votetype AS enum ('DOWNVOTE', 'UPVOTE');
+    END IF;
+
+    IF NOT type_exists('posttype') THEN
+        CREATE TYPE posttype AS enum ('MISC', 'ACTION', 'IMAGE', 'TEXT');
+    END IF;
+
+    IF NOT type_exists('requesttype') THEN
+        CREATE TYPE requesttype AS enum ('FRIENDREQUEST');
+    END IF;
+
+END$$;
+
+-- create tables
+DO $$ BEGIN
+
     CREATE TABLE IF NOT EXISTS "user_sessions" (
         "sid" varchar NOT NULL COLLATE "default",
         "sess" json NOT NULL,
@@ -22,13 +75,13 @@ CREATE TABLE IF NOT EXISTS posts (
         created_at TIMESTAMP DEFAULT now(),
         content text,
         author SERIAL REFERENCES users (id) ON DELETE CASCADE,
-    type varchar(16) NOT NULL DEFAULT 'MISC'
+        type posttype NOT NULL DEFAULT 'MISC'
     );
 
     CREATE TABLE IF NOT EXISTS votes (
         user_id SERIAL REFERENCES users (id) ON DELETE CASCADE,
         item_id BIGSERIAL REFERENCES posts (id) ON DELETE CASCADE,
-    vote_type varchar(8) DEFAULT 'upvote'
+        vote_type votetype DEFAULT 'DOWNVOTE'
     );
 
     CREATE TABLE IF NOT EXISTS events (
@@ -63,3 +116,10 @@ CREATE TABLE IF NOT EXISTS user_friends (
         user_id SERIAL REFERENCES users (id) ON DELETE CASCADE,
         friend_id SERIAL REFERENCES users (id) ON DELETE CASCADE
     );
+
+    CREATE TABLE IF NOT EXISTS requests (
+        sender SERIAL REFERENCES users (id) ON DELETE CASCADE,
+        receiver SERIAL REFERENCES users (id) ON DELETE CASCADE
+    );
+
+END $$;

src/sql/update-tables.sql

@@ -1,8 +1,16 @@
+DO $$ BEGIN
+
     ALTER TABLE IF EXISTS votes
-    ADD COLUMN IF NOT EXISTS vote_type varchar(8) DEFAULT 'UPVOTE',
+        ADD COLUMN IF NOT EXISTS vote_type votetype DEFAULT 'UPVOTE',
+        ALTER COLUMN vote_type TYPE votetype USING cast_to_votetype(vote_type::text),
+        ALTER COLUMN vote_type DROP DEFAULT,
         ALTER COLUMN vote_type SET DEFAULT 'UPVOTE';
 
     ALTER TABLE IF EXISTS posts
+        ALTER COLUMN type TYPE posttype USING cast_to_posttype(type::text),
+        ALTER COLUMN type DROP DEFAULT,
         ALTER COLUMN type SET DEFAULT 'MISC',
         DROP COLUMN IF EXISTS upvotes,
         DROP COLUMN IF EXISTS downvotes;
+
+END $$;