<?php

/**
 * Maintenance script to import one or more images from the local file system into
 * the wiki without using the web-based interface.
 *
 * "Smart import" additions:
 * - aim: preserve the essential metadata (user, description) when importing medias from an existing wiki
 * - process:
 *      - interface with the source wiki, don't use bare files only (see --source-wiki-url).
 *      - fetch metadata from source wiki for each file to import.
 *      - commit the fetched metadata to the destination wiki while submitting.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 * http://www.gnu.org/copyleft/gpl.html
 *
 * @file
 * @ingroup Maintenance
 * @author Rob Church <robchur@gmail.com>
 * @author Mij <mij@bitchx.it>
 */

$optionsWithArgs = array( 'extensions', 'comment', 'comment-file', 'comment-ext', 'user', 'license', 'sleep', 'limit', 'from', 'source-wiki-url' );
require_once( dirname( __FILE__ ) . '/commandLine.inc' );
require_once( dirname( __FILE__ ) . '/importImages.inc' );
$processed = $added = $ignored = $skipped = $overwritten = $failed = 0;

echo( "Import Images\n\n" );

# Need a path
if ( count( $args ) == 0 ) {
	showUsage();
}

$dir = $args[0];

# Check Protection
if ( isset( $options['protect'] ) && isset( $options['unprotect'] ) ) {
	die( "Cannot specify both protect and unprotect.  Only 1 is allowed.\n" );
}

if ( isset( $options['protect'] ) && $options['protect'] == 1 ) {
	die( "You must specify a protection option.\n" );
}

# Prepare the list of allowed extensions
global $wgFileExtensions;
$extensions = isset( $options['extensions'] )
	? explode( ',', strtolower( $options['extensions'] ) )
	: $wgFileExtensions;

# Search the path provided for candidates for import
$files = findFiles( $dir, $extensions );

# Initialise the user for this operation
$user = isset( $options['user'] )
	? User::newFromName( $options['user'] )
	: User::newFromName( 'Maintenance script' );
if ( !$user instanceof User ) {
	$user = User::newFromName( 'Maintenance script' );
}
$wgUser = $user;

# Get block check. If a value is given, this specified how often the check is performed
if ( isset( $options['check-userblock'] ) ) {
	if ( !$options['check-userblock'] ) {
		$checkUserBlock = 1;
	} else {
		$checkUserBlock = (int)$options['check-userblock'];
	}
} else {
	$checkUserBlock = false;
}

# Get --from
$from = @$options['from'];

# Get sleep time.
$sleep = @$options['sleep'];
if ( $sleep ) {
	$sleep = (int)$sleep;
}

# Get limit number
$limit = @$options['limit'];
if ( $limit ) {
	$limit = (int)$limit;
}

# Get the upload comment. Provide a default one in case there's no comment given.
$comment = 'Importing image file';

if ( isset( $options['comment-file'] ) ) {
	$comment =  file_get_contents( $options['comment-file'] );
	if ( $comment === false || $comment === null ) {
		die( "failed to read comment file: {$options['comment-file']}\n" );
	}
} elseif ( isset( $options['comment'] ) ) {
	$comment =  $options['comment'];
}

$commentExt = isset( $options['comment-ext'] ) ? $options['comment-ext'] : false;

# Get the license specifier
$license = isset( $options['license'] ) ? $options['license'] : '';

# Batch "upload" operation
$count = count( $files );
if ( $count > 0 ) {

	foreach ( $files as $file ) {
		$base = wfBaseName( $file );

		# Validate a title
		$title = Title::makeTitleSafe( NS_FILE, $base );
		if ( !is_object( $title ) ) {
			echo( "{$base} could not be imported; a valid title cannot be produced\n" );
			continue;
		}

		if ( $from ) {
			if ( $from == $title->getDBkey() ) {
				$from = null;
			} else {
				$ignored++;
				continue;
			}
		}

		if ( $checkUserBlock && ( ( $processed % $checkUserBlock ) == 0 ) ) {
			$user->clearInstanceCache( 'name' ); // reload from DB!
			if ( $user->isBlocked() ) {
				echo( $user->getName() . " was blocked! Aborting.\n" );
				break;
			}
		}

		# Check existence
		$image = wfLocalFile( $title );
		if ( $image->exists() ) {
			if ( isset( $options['overwrite'] ) ) {
				echo( "{$base} exists, overwriting..." );
				$svar = 'overwritten';
			} else {
				echo( "{$base} exists, skipping\n" );
				$skipped++;
				continue;
			}
		} else {
			if ( isset( $options['skip-dupes'] ) ) {
				$repo = $image->getRepo();
				$sha1 = File::sha1Base36( $file ); # XXX: we end up calculating this again when actually uploading. that sucks.

				$dupes = $repo->findBySha1( $sha1 );

				if ( $dupes ) {
					echo( "{$base} already exists as " . $dupes[0]->getName() . ", skipping\n" );
					$skipped++;
					continue;
				}
			}

			echo( "Importing {$base}..." );
			$svar = 'added';
		}

		if ( isset( $options['source-wiki-url'] ) ) {
			/* find comment text directly from source wiki, through MW's API */
			$real_comment = getFileCommentFromSourceWiki( $options['source-wiki-url'], $base );
			if ( $real_comment === false )
				$commentText = $comment;
			else
				$commentText = $real_comment;

			/* find user directly from source wiki, through MW's API */
			$real_user = getFileUserFromSourceWiki( $options['source-wiki-url'], $base );
			if ( $real_user === false ) {
				$wgUser = $user;
			} else {
				$wgUser = User::newFromName( $real_user );
				if ( $wgUser === false ) {
					# user does not exist in target wiki
					echo ( "failed: user '$real_user' does not exist in target wiki." );
					continue;
				}
			}
		} else {
			# Find comment text
			$commentText = false;

			if ( $commentExt ) {
				$f = findAuxFile( $file, $commentExt );
				if ( !$f ) {
					echo( " No comment file with extension {$commentExt} found for {$file}, using default comment. " );
				} else {
					$commentText = file_get_contents( $f );
					if ( !$commentText ) {
						echo( " Failed to load comment file {$f}, using default comment. " );
					}
				}
			}

			if ( !$commentText ) {
				$commentText = $comment;
			}
		}

		# Import the file
		if ( isset( $options['dry'] ) ) {
			echo( " publishing {$file} by '" . $wgUser->getName() . "', comment '$commentText'... " );
		} else {
			$archive = $image->publish( $file );
			if ( !$archive->isGood() ) {
				echo( "failed. (" .
					$archive->getWikiText() .
					")\n" );
				$failed++;
				continue;
			}
		}

		if ( isset( $options['dry'] ) ) {
			echo( "done.\n" );
		} elseif ( $image->recordUpload( $archive->value, $commentText, $license ) ) {
			# We're done!
			echo( "done.\n" );

			$doProtect = false;

			global $wgRestrictionLevels;

			$protectLevel = isset( $options['protect'] ) ? $options['protect'] : null;

			if ( $protectLevel && in_array( $protectLevel, $wgRestrictionLevels ) ) {
				$doProtect = true;
			}
			if ( isset( $options['unprotect'] ) ) {
				$protectLevel = '';
				$doProtect = true;
			}

			if ( $doProtect ) {
					# Protect the file
					echo "\nWaiting for slaves...\n";
					// Wait for slaves.
					sleep( 2.0 ); # Why this sleep?
					wfWaitForSlaves();

					echo( "\nSetting image restrictions ... " );

					$cascade = false;
					$restrictions = array();
					foreach( $title->getRestrictionTypes() as $type ) {
						$restrictions[$type] = $protectLevel;
					}

					$page = WikiPage::factory( $title );
					$status = $page->doUpdateRestrictions( $restrictions, array(), $cascade, '', $user );
					echo( ( $status->isOK() ? 'done' : 'failed' ) . "\n" );
			}

		} else {
			echo( "failed. (at recordUpload stage)\n" );
			$svar = 'failed';
		}

		$$svar++;
		$processed++;

		if ( $limit && $processed >= $limit ) {
			break;
		}

		if ( $sleep ) {
			sleep( $sleep );
		}
	}

	# Print out some statistics
	echo( "\n" );
	foreach ( array( 'count' => 'Found', 'limit' => 'Limit', 'ignored' => 'Ignored',
		'added' => 'Added', 'skipped' => 'Skipped', 'overwritten' => 'Overwritten',
		'failed' => 'Failed' ) as $var => $desc ) {
		if ( $$var > 0 )
			echo( "{$desc}: {$$var}\n" );
	}

} else {
	echo( "No suitable files could be found for import.\n" );
}

exit( 0 );

function showUsage( $reason = false ) {
	if ( $reason ) {
		echo( $reason . "\n" );
	}

	echo <<<TEXT
Imports images and other media files into the wiki
USAGE: php importImages.php [options] <dir>

<dir> : Path to the directory containing images to be imported

Options:
--extensions=<exts>	Comma-separated list of allowable extensions, defaults to \$wgFileExtensions
--overwrite		Overwrite existing images with the same name (default is to skip them)
--limit=<num>		Limit the number of images to process. Ignored or skipped images are not counted.
--from=<name>		Ignore all files until the one with the given name. Useful for resuming
						aborted imports. <name> should be the file's canonical database form.
--skip-dupes		Skip images that were already uploaded under a different name (check SHA1)
--sleep=<sec> 		Sleep between files. Useful mostly for debugging.
--user=<username> 	Set username of uploader, default 'Maintenance script'
--check-userblock 	Check if the user got blocked during import.
--comment=<text>  	Set upload summary comment, default 'Importing image file'.
--comment-file=<file>  	Set upload summary comment the the content of <file>.
--comment-ext=<ext>  	Causes the comment for each file to be loaded from a file with the same name
			but the extension <ext>. If a global comment is also given, it is appended.
--license=<code>  	Use an optional license template
--dry			Dry run, don't import anything
--protect=<protect>     Specify the protect value (autoconfirmed,sysop)
--unprotect             Unprotects all uploaded images
--source-wiki-url   if specified, take User and Comment data for each imported file from this URL.
					For example, --source-wiki-url="http://en.wikipedia.org/"

TEXT;
	exit( 1 );
}
