1 files changed, 82 insertions, 0 deletions
diff --git a/src/modules/move.js b/src/modules/move.js
new file mode 100644
index 0000000..973143d
--- /dev/null
+++ b/src/modules/move.js
@@ -0,0 +1,82 @@
+const config = require('../config');
+const Eris = require('eris');
+const transliterate = require("transliteration");
+const erisEndpoints = require('eris/lib/rest/Endpoints');
+
+module.exports = ({ bot, knex, config, commands }) => {
+  if (! config.allowMove) return;
+
+  commands.addInboxThreadCommand('move', '<category:string$>', async (msg, args, thread) => {
+    const searchStr = args.category;
+    const normalizedSearchStr = transliterate.slugify(searchStr);
+
+    const categories = msg.channel.guild.channels.filter(c => {
+      // Filter to categories that are not the thread's current parent category
+      return (c instanceof Eris.CategoryChannel) && (c.id !== msg.channel.parentID);
+    });
+
+    if (categories.length === 0) return;
+
+    // See if any category name contains a part of the search string
+    const containsRankings = categories.map(cat => {
+      const normalizedCatName = transliterate.slugify(cat.name);
+
+      let i = 0;
+      do {
+        if (! normalizedCatName.includes(normalizedSearchStr.slice(0, i + 1))) break;
+        i++;
+      } while (i < normalizedSearchStr.length);
+
+      if (i > 0 && normalizedCatName.startsWith(normalizedSearchStr.slice(0, i))) {
+        // Slightly prioritize categories that *start* with the search string
+        i += 0.5;
+      }
+
+      return [cat, i];
+    });
+
+    // Sort by best match
+    containsRankings.sort((a, b) => {
+      return a[1] > b[1] ? -1 : 1;
+    });
+
+    if (containsRankings[0][1] === 0) {
+      thread.postSystemMessage('No matching category');
+      return;
+    }
+
+    const targetCategory = containsRankings[0][0];
+
+    try {
+      await bot.editChannel(thread.channel_id, {
+        parentID: targetCategory.id
+      });
+    } catch (e) {
+      thread.postSystemMessage(`Failed to move thread: ${e.message}`);
+      return;
+    }
+
+    // If enabled, sync thread channel permissions with the category it's moved to
+    if (config.syncPermissionsOnMove) {
+      const newPerms = Array.from(targetCategory.permissionOverwrites.map(ow => {
+        return {
+          id: ow.id,
+          type: ow.type,
+          allow: ow.allow,
+          deny: ow.deny
+        };
+      }));
+
+      try {
+        await bot.requestHandler.request("PATCH", erisEndpoints.CHANNEL(thread.channel_id), true, {
+          permission_overwrites: newPerms
+        });
+      } catch (e) {
+        thread.postSystemMessage(`Thread moved to ${targetCategory.name.toUpperCase()}, but failed to sync permissions: ${e.message}`);
+        return;
+      }
+    }
+
+    thread.postSystemMessage(`Thread moved to ${targetCategory.name.toUpperCase()}`);
+  });
+};