From 64e370eb7e8064ba13451de082bd64a81c90d26a Mon Sep 17 00:00:00 2001
From: Andreas Gohr <andi@splitbrain.org>
Date: Mon, 8 Jul 2024 13:11:50 +0200
Subject: [PATCH] optionally move media with page rename  #222

A new checkbox allows to move referenced page media along with a page
rename.

This happens only if

* the checkbox is ticked
* the page actually moves to a new namespace
* the page was not in the root namespace
* the referenced media is in the same namespace as the page
---
 action/rename.php | 60 +++++++++++++++++++++++++++++++++++++++--------
 lang/en/lang.php  |  1 +
 script/rename.js  | 10 ++++++--
 3 files changed, 59 insertions(+), 12 deletions(-)

diff --git a/action/rename.php b/action/rename.php
index ca7cb0d..814767b 100644
--- a/action/rename.php
+++ b/action/rename.php
@@ -94,6 +94,11 @@ public function addsvgbutton(Doku_Event $event) {
 
     /**
      * Rename a single page
+     *
+     * This creates a plan and executes it right away. If the user selected to move media with the page,
+     * all media files used in the original page that are located in the same namespace are moved with the page
+     * to the new namespace.
+     *
      */
     public function handle_ajax(Doku_Event $event) {
         if($event->data != 'plugin_move_rename') return;
@@ -105,24 +110,59 @@ public function handle_ajax(Doku_Event $event) {
 
         $src = cleanID($INPUT->str('id'));
         $dst = cleanID($INPUT->str('newid'));
+        $doMedia = $INPUT->bool('media');
 
-        /** @var helper_plugin_move_op $MoveOperator */
-        $MoveOperator = plugin_load('helper', 'move_op');
+        header('Content-Type: application/json');
 
-        $JSON = new JSON();
+        if(!$this->renameOkay($src)) {
+            echo json_encode(['error' => $this->getLang('cantrename')]);
+            return;
+        }
 
-        header('Content-Type: application/json');
+        /** @var helper_plugin_move_plan $plan */
+        $plan = plugin_load('helper', 'move_plan');
+        if($plan->isCommited()) {
+            echo json_encode(['error' => $this->getLang('cantrename')]);
+            return;
+        }
+        $plan->setOption('autorewrite', true);
+        $plan->addPageMove($src, $dst); // add the page move to the plan
+
+        if($doMedia) { // move media with the page?
+            $srcNS = getNS($src);
+            $dstNS = getNS($dst);
+            $srcNSLen = strlen($srcNS);
+            // we don't do this for root namespace or if namespace hasn't changed
+            if ($srcNS != '' && $srcNS != $dstNS) {
+                $media = p_get_metadata($src, 'relation media');
+                if (is_array($media)) {
+                    foreach ($media as $file => $exists) {
+                        if(!$exists) continue;
+                        $mediaNS = getNS($file);
+                        if ($mediaNS == $srcNS) {
+                            $plan->addMediaMove($file, $dstNS . substr($file, $srcNSLen));
+                        }
+                    }
+                }
+            }
+        }
 
-        if($this->renameOkay($src) && $MoveOperator->movePage($src, $dst)) {
-            // all went well, redirect
-            echo $JSON->encode(array('redirect_url' => wl($dst, '', true, '&')));
-        } else {
+        try {
+            // commit and execute the plan
+            $plan->commit();
+            do {
+                $next = $plan->nextStep();
+                if ($next === false) throw new \Exception('Move plan failed');
+            } while ($next > 0);
+            echo json_encode(array('redirect_url' => wl($dst, '', true, '&')));
+        } catch (\Exception $e) {
+            // error should be in $MSG
             if(isset($MSG[0])) {
                 $error = $MSG[0]; // first error
             } else {
-                $error = $this->getLang('cantrename');
+                $error = $this->getLang('cantrename') . ' ' . $e->getMessage();
             }
-            echo $JSON->encode(array('error' => $error));
+            echo json_encode(['error' => $error]);
         }
     }
 
diff --git a/lang/en/lang.php b/lang/en/lang.php
index 48a81d6..202ab3b 100644
--- a/lang/en/lang.php
+++ b/lang/en/lang.php
@@ -72,6 +72,7 @@
 $lang['js']['rename']     = 'Rename';
 $lang['js']['cancel']     = 'Cancel';
 $lang['js']['newname']    = 'New name:';
+$lang['js']['rename_media']  = 'Move referenced media files along with the page';
 $lang['js']['inprogress'] = 'renaming page and adjusting links...';
 $lang['js']['complete']   = 'Move operation finished.';
 
diff --git a/script/rename.js b/script/rename.js
index 03a8e5f..cf4d916 100644
--- a/script/rename.js
+++ b/script/rename.js
@@ -14,6 +14,9 @@
         '<label>' + LANG.plugins.move.newname + '<br>' +
         '<input type="text" name="id" style="width:100%">' +
         '</label>' +
+        '<label>' +
+        '<input type="checkbox" name="media" value="1"> ' + LANG.plugins.move.rename_media +
+        '</label>' +
         '</form>' +
         '</div>'
     );
@@ -26,6 +29,8 @@
         const newid = $dialog.find('input[name=id]').val();
         if (!newid) return false;
 
+        const doMedia = $dialog.find('input[name=media]').is(':checked');
+
         // remove buttons and show throbber
         $dialog.html(
             '<img src="' + DOKU_BASE + 'lib/images/throbber.gif" /> ' +
@@ -39,12 +44,13 @@
             {
                 call: 'plugin_move_rename',
                 id: JSINFO.id,
-                newid: newid
+                newid: newid,
+                media: doMedia ? 1 : 0,
             },
             // redirect or display error
             function (result) {
                 if (result.error) {
-                    $dialog.html(result.error.msg);
+                    $dialog.html(result.error);
                 } else {
                     window.location.href = result.redirect_url;
                 }