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MDL-54869 files: Create new required functions

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This was a complex change requiring three new functions:
file_merge_files_from_draft_area_into_filearea - To just add files from a draft area into a real one (just adding or updating, not deleting)
file_merge_draft_area_into_draft_area - To merge files from two draft areas, used by the latest for creating a draft area with all the original files plus the new ones.
file_overwrite_existing_draftfile - Required to update existing files not losing metadata or references.

The whole process is the following:

    User uploads a file (upload.php)
    Client gets a new draftid A containing the file only (return of upload.php)
    Client requests to merge that draftid in the user's private files (core_user_add_user_private_files)
    Server prepares a new UNUSED draftid B from existing area
    Server merges A into B
    Server saves the draft B into the final area
This commit is contained in:
Juan Leyva 2016-06-15 08:50:07 +01:00
parent d089e4984d
commit 460897052e
3 changed files with 356 additions and 2 deletions
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2
webservice/upload.php
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@ -159,7 +159,7 @@ foreach ($files as $file) {
$file_record->itemid = $itemid;
$file_record->license = $CFG->sitedefaultlicense;
$file_record->author = fullname($authenticationinfo['user']);
$file_record->source = '';
$file_record->source = serialize((object)array('source' => $file->filename));
//Check if the file already exist
$existingfile = $fs->file_exists($file_record->contextid, $file_record->component, $file_record->filearea,