- get_file should have a request timeout and throw an exception with the details (i.e. timeout reached) if download can
not be completed
- corrected phpdocs

MDL-33136 Dndupload filemanager - user asked to rename/overwrite file when droping file with existing name

- do not die with fatal error if source file in moodle internal repository is missing;
- moved code duplication for moodle repositories into class repository (functions send_file, get_reference_details, get_file_by_reference, get_file_reference);
- update file status after repository::sync_external_file so we know that it is missing (or not missing anymore). Do not run this function more than once for file within one request;
- display readable name for Private Files and Server files with the new format;
- display broken icon in filemanager if we know that source is missing, display information (for admin) where it was located before: see repository::get_reference_details() and extending classes;
- removed unnecessary queries in stored_file::sync_external_file();
- syncronize files before displaying it's size in mod_resource, do not query  directly

- Files that are references to external resources have special shortcut icon in filemanager
- When user selects a REF file in filemanager, he can see the 'Original' of the file in the way that original repository wants to show it, it is loaded dynamically via AJAX request
- Files that are themselves the source of references of other files in the system have 'link' icon in filemanager. When user tries to remove/rename/overwrite SRC file he is warned that all ## existing references will be updated/converted to copies.
- Changed confirmation messages for deleting, moving/renaming of the folders
- confirmation dialog in filemanager is using YUI3 now

- fixed displaying and dragging of dialog popups;
- fixed error when repository results are filtered;
- added string for image dimensions

- added new functions to the backend (repository/draftfiles_ajax.php) to allow changing of file name, location, license and author in one request
- enabled changing file properties using JS UI (lib/form/filemanager.js)

- Filepicker window is now resizable and draggable;
- filepicker&renderer: removed id substitution from renderer, replaced it with classes (better readability);
- filepicker: allowed tree and table view for search results;
- filepicker: fixed small bug with displaying external link checkbox
- filepicker: display additional information about file in select window, repository returns more formatted information

- Added table view in Filepicker where for each file we show Name, Last modified, Size and Type. Sortable by column
- Preprocess list of files returned from repositories to include formatted size, dates, type and also add filetype icon
- Make sure that local repositories (coursefiles, filesystem, local, recent, user) return information about file size, datemodified, datecreated, author, license

- create repository renderer, implement functions for returning HTML templates used in filepicker
- let filepicker use HTML from templates
- move CSS for filemanager and filepicker to the separate css file in base theme
- use only YUI3 in filepicker (get rid of YUI2)
- add button for 'View details' in filepicker (though this view mode is still not ready)

Dongsheng Cai authored May 12, 2012 and Marina Glancy committed May 21, 2012

1. Allow repository to create references to external contents
2. Extends files API to handle file references
3. Generic file caching
4. Backup/restore file references
5. Download external contents if repository uninstalled
6. Allow filepicker to display iframe
7. PHPUnit test suits

Dropbox changed authorization URL, and added a few error check code

1. Fixed add file language string
2. Fixed hard-coded 'moving' string
3. Fixed hard-coded 'Files' string

The new strings file core_plugin defines names of all plugin types
supported by Moodle. Some strings have already been defined elsewhere
and we use AMOS script here to copy their translation, if it is
available.

AMOS BEGIN
 CPY [settings,core],[settings,core_plugin]
 CPY [status,core],[status,core_plugin]
 CPY [missingfromdisk,core],[status_missing,core_plugin]
 CPY [nodatabase,core_admin],[status_nodb,core_plugin]
 CPY [authenticationplugins,core],[type_auth_plural,core_plugin]
 CPY [block,core],[type_block,core_plugin]
 CPY [blocks,core],[type_block_plural,core_plugin]
 CPY [coursereport,core],[type_coursereport,core_plugin]
 CPY [coursereports,core],[type_coursereport_plural,core_plugin]
 CPY [filter,core],[type_filter,core_plugin]
 CPY [courseformats,core],[type_format_plural,core_plugin]
 CPY [activitymodule,core],[type_mod,core_plugin]
 CPY [activitymodules,core],[type_mod_plural,core_plugin]
 CPY [plagiarism,core_plagiarism],[type_plagiarism,core_plugin]
 CPY [portfolio,core_portfolio],[type_portfolio,core_plugin]
 CPY [portfolios,core_portfolio],[type_portfolio_plural,core_plugin]
 CPY [questiontype,core_admin],[type_qtype,core_plugin]
 CPY [questiontypes,core_admin],[type_qtype_plural,core_plugin]
 CPY [repository,core_repository],[type_repository,core_plugin]
 CPY [theme,core],[type_theme,core_plugin]
 CPY [themes,core],[type_theme_plural,core_plugin]
 CPY [uninstallplugin,core_admin],[uninstall,core_plugin]
 CPY [version,core],[version,core_plugin]
 CPY [assignmenttype,mod_assignment],[subplugintype_assignment,mod_assignment]
 CPY [presets,mod_data],[subplugintype_datapreset_plural,mod_data]
 CPY [evaluationmethod,mod_workshop],[subplugintype_workshopeval,mod_workshop]
 CPY [strategy,mod_workshop],[subplugintype_workshopform,mod_workshop]
AMOS END

AMOS BEGIN
 MOV [move scheduledsetup,core_backup],[automatedsetup,core_backup]
 MOV [scheduledsettings,core_backup],[automatedsettings,core_backup]
 MOV [scheduledstorage,core_backup],[automatedstorage,core_backup]
 MOV [scheduledstoragehelp,core_backup],[automatedstoragehelp,core_backup]
 MOV [scheduledbackupsinactive,core],[automatedbackupsinactive,core_backup]
 MOV [scheduledbackupstatus,core],[automatedbackupstatus,core_backup]
 CPY [schedule,core],[automatedbackupschedule,core_backup]
 MOV [backupschedulehelp,core],[automatedbackupschedulehelp,core_backup]
AMOS END

Admin MDL-23244 Portfolio/repo admin pages use nested forms, which are illegal HTML and cause first dropdown on page to break

"MDL-23326, fixed undefined index in repository conf form, added validation function to repository plugin"

1. rename repository.class to lib.php
2. fixed repository_callback.php
3. repository_ajax use moodle default exception handler
4. improve file_get_user_used_space performance