Revert "Revert "Merge branch 'master' of https://github.com/LukasNowy/SmartShopper""

This reverts commit 84afb3f32d.

express-server/db-connect/db-connect.js

@@ -1,5 +1,6 @@
 const { query, nonQuery } = require("../db-config/postgresql-common");
 
+//SELECT own shopping lists
 async function getShoppinglistsAdmin(username) {
     try {
 
@@ -14,6 +15,8 @@ async function getShoppinglistsAdmin(username) {
     }
 }
 
+//SELECT shared shopping lists
+
 async function getShoppinglistsShared(username) {
     try {
         let result = await query('SELECT row_to_json("Shoppinglist") AS obj FROM "Shoppinglist" JOIN "Shoppinglist_member" USING (sl_id) WHERE \
@@ -27,7 +30,46 @@ async function getShoppinglistsShared(username) {
     }
 }
 
+//INSERT new Shoppinglist
+
+async function newShoppinglist(name, description, username) {
+
+    //generate sl_id
+
+    let sl_id = generate_sl_id();
+
+    //insert shoppinglist
+    try {
+        await nonQuery('INSERT INTO "Shoppinglist" (sl_id, name, description) VALUES ($1, $2, $3);', [sl_id, name, description]);
+    } 
+    
+    catch (error) {
+        console.error(error)
+    }
+
+    //insert admin
+    try {
+        await nonQuery('INSERT INTO "Shoppinglist_admin" (username, sl_id) VALUES ($1, $2);', [username, sl_id]);
+    }  
+    
+    catch (error) {
+        console.error(error)
+    }
+}
+
+
+//sl_id generieren
+function generate_sl_id() {
+    var possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
+    var output = "";
+
+    for(let i = 0; i < 8; i++) {
+        output += possible.charAt(Math.floor(Math.random() * possible.length));
+    }
+
+    return output;
+}
 
 module.exports = {
-    getShoppinglistsAdmin, getShoppinglistsShared
+    getShoppinglistsAdmin, getShoppinglistsShared, newShoppinglist
 }