Invite Link

Einladungslink erstellen und über diesen zu shoppinglist eingeladen werden

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

@@ -80,13 +80,11 @@ async function generateUser() {
 }
 
 //get shoppinglist content
-async function displayShoppinglist(sl_id) {
+async function displayShoppinglist(sl_id, username) {
     try {
         let groups = await query('SELECT row_to_json("Group") AS obj FROM "Group" JOIN "Shoppinglist" USING (sl_id) WHERE sl_id = $1;', [sl_id]);
         let items = await query('SELECT row_to_json("Item") AS obj FROM "Item" JOIN "Group" USING (group_id) WHERE "Group".sl_id = $1;', [sl_id]);
         return items_in_groups(groups, items, sl_id);
-        
-        
     }
 
     catch (error) {
@@ -135,6 +133,35 @@ async function addItem(group_id, sl_id, name, count) {
     }
 }
 
+// Invite System
+
+async function verifyInvite(link, user_id) {
+    try {
+        let result = await query('SELECT row_to_json("Shoppinglist") AS obj FROM "Shoppinglist" WHERE invitelink = $1;', [link]);
+        let sl_id = result[0].sl_id;
+        console.log(result[0].sl_id);
+        await nonQuery('INSERT INTO "Shoppinglist_member" (username, sl_id) VALUES ($1, $2);', [user_id, sl_id]);
+    }
+
+    catch (error) {
+        console.error(error);
+    }
+}
+
+async function createInvite(sl_id) {
+    try {
+        let link = generateInviteLink();
+        await nonQuery('UPDATE "Shoppinglist" SET invitelink = $1 WHERE sl_id = $2;', [link, sl_id]);
+    }
+
+    catch (error) {
+        console.error(error);
+    }
+}
+
+
+
+
 
 
 //sl_id generieren
@@ -193,7 +220,19 @@ function items_in_groups(groups, items, sl_id) {
     return result;
 }
 
+//Create invite link for your own shoppinglist
+function generateInviteLink() {
+    var possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
+    var output = "";
+
+    for(let i = 0; i < 50; i++) {
+        output += possible.charAt(Math.floor(Math.random() * possible.length));
+    }
+
+    return output;
+}
+
 module.exports = {
     getShoppinglistsAdmin, getShoppinglistsShared, newShoppinglist, displayShoppinglist, deleteShoppinglist, addGroup,
-    addItem
+    addItem, verifyInvite, createInvite
 }