add: added image attachments to messages

back/libs/mysql.js

@@ -617,6 +617,20 @@ function deleteUnusedAttachments(connection) {
   });
 }
 
+function getUnusedAttachments(connection) {
+  return new Promise((resolve, reject) => {
+    connection.query(
+      `SELECT * FROM attachments WHERE message_id IS NULL`,
+      (error, result) => {
+        if (error) {
+          reject(new Error(error));
+        }
+        resolve(result);
+      }
+    );
+  });
+}
+
 function getMessageAttachments(connection, message_id) {
   return new Promise((resolve, reject) => {
     connection.query(
@@ -632,6 +646,21 @@ function getMessageAttachments(connection, message_id) {
   });
 }
 
+function getAttachment(connection, file_name) {
+  return new Promise((resolve, reject) => {
+    connection.query(
+      `SELECT * FROM attachments WHERE file_name = ?`,
+      [file_name],
+      (error, result) => {
+        if (error) {
+          reject(new Error(error));
+        }
+        resolve(result);
+      }
+    );
+  });
+}
+
 module.exports = {
   getConnection,
 
@@ -672,4 +701,10 @@ module.exports = {
   getEmoji,
   getEmojiByName,
   searchEmojis,
+
+  addAttachment,
+  deleteUnusedAttachments,
+  getUnusedAttachments,
+  getMessageAttachments,
+  getAttachment,
 };