fixed insertContact again

server/db/db.js

@@ -514,58 +514,117 @@ async function insertContactById(senderId, conversation_id, read) {
 
 async function insertContact(initiatorId, receiverId, contactUsername, read) {
   try {
-    const findConversationQuery = `
-       SELECT c.conversation_id
-       FROM Conversations c
-       JOIN Memberships m1 ON c.conversation_id = m1.conversation_id
-       JOIN Memberships m2 ON c.conversation_id = m2.conversation_id
-       WHERE c.conversation_type = 'direct'
-       AND (
-           (m1.user_id = $1 AND m2.user_id = $2)
-           OR 
-           (m1.user_id = $2 AND m2.user_id = $1)
-       )
-       AND (
-           SELECT COUNT(DISTINCT user_id) 
-           FROM Memberships 
-           WHERE conversation_id = c.conversation_id
-       ) = 1 
-       LIMIT 1    
-    `;
-    const conversationResult = await client.query(findConversationQuery, [
-      initiatorId,
-      receiverId,
-    ]);
-    let conversation_id = conversationResult.rows[0]?.conversation_id;
+    let conversation_id;
 
-    // Create new conversation if none exists
-    if (!conversation_id) {
-      const createConversationQuery = `
-        INSERT INTO Conversations (conversation_type)
-        VALUES ('direct')
-        RETURNING conversation_id
+    // Check if the user is creating a contact for themselves
+    const isSelfContact = initiatorId === receiverId;
+
+    if (isSelfContact) {
+      // For self-contacts, check if a conversation already exists for the user alone
+      const findSelfConversationQuery = `
+        SELECT c.conversation_id
+        FROM Conversations c
+        JOIN Memberships m ON c.conversation_id = m.conversation_id
+        WHERE c.conversation_type = 'direct'
+        AND m.user_id = $1
+        AND (
+          SELECT COUNT(*)
+          FROM Memberships
+          WHERE conversation_id = c.conversation_id
+        ) = 1
+        LIMIT 1;
       `;
-      const newConversationResult = await client.query(createConversationQuery);
 
-      if (!newConversationResult) {
-        console.error("Failed to create new conversation");
-        return null;
+      const selfConversationResult = await client.query(
+        findSelfConversationQuery,
+        [initiatorId],
+      );
+      conversation_id = selfConversationResult.rows[0]?.conversation_id;
+
+      if (!conversation_id) {
+        // Create a new conversation for the user alone
+        const createConversationQuery = `
+          INSERT INTO Conversations (conversation_type)
+          VALUES ('direct')
+          RETURNING conversation_id;
+        `;
+        const newConversationResult = await client.query(
+          createConversationQuery,
+        );
+
+        if (!newConversationResult) {
+          console.error("Failed to create new conversation for self-contact");
+          return null;
+        }
+
+        conversation_id = newConversationResult.rows[0].conversation_id;
+
+        // Add the user as the only member of the conversation
+        const createMembershipQuery = `
+          INSERT INTO Memberships (conversation_id, user_id)
+          VALUES ($1, $2)
+          ON CONFLICT (conversation_id, user_id) DO NOTHING;
+        `;
+        await client.query(createMembershipQuery, [
+          conversation_id,
+          initiatorId,
+        ]);
       }
-
-      conversation_id = newConversationResult.rows[0].conversation_id;
-      // Create memberships for users
-      const createMembershipsQuery = `
-        INSERT INTO Memberships (conversation_id, user_id)
-        VALUES ($1, $2), ($1, $3)
-        ON CONFLICT (conversation_id, user_id) DO NOTHING
+    } else {
+      // For regular contacts, check if a conversation already exists between the two users
+      const findConversationQuery = `
+        SELECT c.conversation_id
+        FROM Conversations c
+        JOIN Memberships m1 ON c.conversation_id = m1.conversation_id
+        JOIN Memberships m2 ON c.conversation_id = m2.conversation_id
+        WHERE c.conversation_type = 'direct'
+        AND (
+          (m1.user_id = $1 AND m2.user_id = $2)
+          OR 
+          (m1.user_id = $2 AND m2.user_id = $1)
+        )
+        LIMIT 1;
       `;
-      await client.query(createMembershipsQuery, [
-        conversation_id,
+
+      const conversationResult = await client.query(findConversationQuery, [
         initiatorId,
         receiverId,
       ]);
+      conversation_id = conversationResult.rows[0]?.conversation_id;
+
+      if (!conversation_id) {
+        // Create a new conversation for the two users
+        const createConversationQuery = `
+          INSERT INTO Conversations (conversation_type)
+          VALUES ('direct')
+          RETURNING conversation_id;
+        `;
+        const newConversationResult = await client.query(
+          createConversationQuery,
+        );
+
+        if (!newConversationResult) {
+          console.error("Failed to create new conversation");
+          return null;
+        }
+
+        conversation_id = newConversationResult.rows[0].conversation_id;
+
+        // Add both users as members of the conversation
+        const createMembershipsQuery = `
+          INSERT INTO Memberships (conversation_id, user_id)
+          VALUES ($1, $2), ($1, $3)
+          ON CONFLICT (conversation_id, user_id) DO NOTHING;
+        `;
+        await client.query(createMembershipsQuery, [
+          conversation_id,
+          initiatorId,
+          receiverId,
+        ]);
+      }
     }
 
+    // Insert the contact for the initiator
     const contact = await insertContactById(initiatorId, conversation_id, read);
     if (!contact.contact_id) {
       console.error("Failed to insert contact by id");