From 95648a56e3ff0ffc97f63fde5e9e74b45f83c11a Mon Sep 17 00:00:00 2001
From: Seth Falco <seth@elypia.org>
Date: Wed, 13 Jan 2021 16:29:02 +0100
Subject: [PATCH] Delete only if Regular Expression Matches

---
 deleteDiscordMessages.js      | 18 +++++++++++++++---
 deleteDiscordMessages.user.js | 18 +++++++++++++++---
 2 files changed, 30 insertions(+), 6 deletions(-)

diff --git a/deleteDiscordMessages.js b/deleteDiscordMessages.js
index 96d25b41..2c03882b 100644
--- a/deleteDiscordMessages.js
+++ b/deleteDiscordMessages.js
@@ -39,6 +39,9 @@
                 <label><input id="hasFile" type="checkbox">has: file</label><br>
                 <label><input id="includePinned" type="checkbox">Include pinned</label>
             </span>
+            <span>Pattern<br>
+                <input id="pattern" type="text" placeholder="pattern to remove" priv>
+            </span>
         </div>
         <hr>
         <button id="start" style="background:#43b581;width:80px;">Start</button>
@@ -73,6 +76,7 @@
         const hasFile = $('input#hasFile').checked;
         const includeNsfw = $('input#includeNsfw').checked;
         const includePinned = $('input#includePinned').checked;
+        const pattern = $('input#pattern').value;
         const progress = $('#progress');
 
         const fileSelection = $("input#file");
@@ -100,7 +104,7 @@
 
         stop = stopBtn.disabled = !(startBtn.disabled = true);
         for (let i = 0; i < channelIds.length; i++) {
-            await deleteMessages(authToken, authorId, guildId, channelIds[i], minId || minDate, maxId || maxDate, content, hasLink, hasFile, includeNsfw, includePinned, logger, stopHndl, onProg);
+            await deleteMessages(authToken, authorId, guildId, channelIds[i], minId || minDate, maxId || maxDate, content, hasLink, hasFile, includeNsfw, includePinned, pattern, logger, stopHndl, onProg);
             stop = stopBtn.disabled = !(startBtn.disabled = false);
         }
     };
@@ -147,7 +151,7 @@
      * @author Victornpb <https://www.github.com/victornpb>
      * @see https://github.com/victornpb/deleteDiscordMessages
      */
-    async function deleteMessages(authToken, authorId, guildId, channelId, minId, maxId, content,hasLink, hasFile, includeNsfw, includePinned, extLogger, stopHndl, onProgress) {
+    async function deleteMessages(authToken, authorId, guildId, channelId, minId, maxId, content,hasLink, hasFile, includeNsfw, includePinned, pattern, extLogger, stopHndl, onProgress) {
         const start = new Date();
         let deleteDelay = 100;
         let searchDelay = 100;
@@ -242,12 +246,20 @@
                 }
             }
     
+            let regex;
+
+            try {
+                regex = new RegExp(pattern);
+            } catch(e) {
+                log.warn('Ignoring RegExp because pattern is malformed')
+            }
+
             const data = await resp.json();
             const total = data.total_results;
             if (!grandTotal) grandTotal = total;
             const discoveredMessages = data.messages.map(convo => convo.find(message => message.hit===true));
             const messagesToDelete = discoveredMessages.filter(msg => {
-                return msg.type === 0 || msg.type === 6 || (msg.pinned && includePinned);
+                return (msg.type === 0 || msg.type === 6 || (msg.pinned && includePinned)) && (!regex || msg.content.match(regex));
             });
             const skippedMessages = discoveredMessages.filter(msg=>!messagesToDelete.find(m=> m.id===msg.id));
 
diff --git a/deleteDiscordMessages.user.js b/deleteDiscordMessages.user.js
index 21b35160..2c4ccc3b 100644
--- a/deleteDiscordMessages.user.js
+++ b/deleteDiscordMessages.user.js
@@ -29,7 +29,7 @@
  * @author Victornpb <https://www.github.com/victornpb>
  * @see https://github.com/victornpb/deleteDiscordMessages
  */
-async function deleteMessages(authToken, authorId, guildId, channelId, minId, maxId, content, hasLink, hasFile, includeNsfw, includePinned, searchDelay, deleteDelay, extLogger, stopHndl, onProgress) {
+async function deleteMessages(authToken, authorId, guildId, channelId, minId, maxId, content, hasLink, hasFile, includeNsfw, includePinned, pattern, searchDelay, deleteDelay, extLogger, stopHndl, onProgress) {
     const start = new Date();
     let delCount = 0;
     let failCount = 0;
@@ -122,12 +122,20 @@ async function deleteMessages(authToken, authorId, guildId, channelId, minId, ma
             }
         }
 
+        let regex;
+
+        try {
+            regex = new RegExp(pattern);
+        } catch(e) {
+            log.warn('Ignoring RegExp because pattern is malformed')
+        }
+
         const data = await resp.json();
         const total = data.total_results;
         if (!grandTotal) grandTotal = total;
         const discoveredMessages = data.messages.map(convo => convo.find(message => message.hit === true));
         const messagesToDelete = discoveredMessages.filter(msg => {
-            return msg.type === 0 || msg.type === 6 || (msg.pinned && includePinned);
+            return (msg.type === 0 || msg.type === 6 || (msg.pinned && includePinned)) && (!regex || msg.content.match(regex));
         });
         const skippedMessages = discoveredMessages.filter(msg => !messagesToDelete.find(m => m.id === msg.id));
 
@@ -304,6 +312,9 @@ function initUI() {
                     <label><input id="hasFile" type="checkbox">has: file</label><br>
                     <label><input id="includePinned" type="checkbox">Include pinned</label>
                 </span><br>
+                <span>Pattern<br>
+                    <input id="pattern" type="text" placeholder="pattern to remove" priv>
+                </span>
                 <span>Search Delay <a
                 href="https://github.com/victornpb/deleteDiscordMessages/blob/master/help/delay.md" title="Help"
                 target="_blank">?</a><br>
@@ -385,6 +396,7 @@ function initUI() {
         const hasFile = $('input#hasFile').checked;
         const includeNsfw = $('input#includeNsfw').checked;
         const includePinned = $('input#includePinned').checked;
+        const pattern = $('input#pattern').value;
         const searchDelay = parseInt($('input#searchDelay').value.trim());
         const deleteDelay = parseInt($('input#deleteDelay').value.trim());
         const progress = $('#progress');
@@ -421,7 +433,7 @@ function initUI() {
 
         stop = stopBtn.disabled = !(startBtn.disabled = true);
         for (let i = 0; i < channelIds.length; i++) {
-            await deleteMessages(authToken, authorId, guildId, channelIds[i], minId || minDate, maxId || maxDate, content, hasLink, hasFile, includeNsfw, includePinned, searchDelay, deleteDelay, logger, stopHndl, onProg);
+            await deleteMessages(authToken, authorId, guildId, channelIds[i], minId || minDate, maxId || maxDate, content, hasLink, hasFile, includeNsfw, includePinned, pattern, searchDelay, deleteDelay, logger, stopHndl, onProg);
             stop = stopBtn.disabled = !(startBtn.disabled = false);
         }
     };