/*
XOWA: the XOWA Offline Wiki Application
Copyright (C) 2012 gnosygnu@gmail.com

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as
published by the Free Software Foundation, either version 3 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 Affero General Public License for more details.

You should have received a copy of the GNU Affero General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
package gplx.xowa.mediawiki.includes.title; import gplx.*; import gplx.xowa.*; import gplx.xowa.mediawiki.*; import gplx.xowa.mediawiki.includes.*;
import gplx.xowa.mediawiki.languages.*;
import gplx.xowa.mediawiki.includes.utls.*;
public class XomwMediaWikiTitleCodec implements XomwTitleFormatter {
	/**
	* @var Language
	*/
	private XomwLanguage language;

//		/**
//		* @var GenderCache
//		*/
//		protected $genderCache;
//
//		/**
//		* @var String[]
//		*/
//		protected $localInterwikis;
//
//		/**
//		* @param Language language The language Object to use for localizing namespace names.
//		* @param GenderCache $genderCache The gender cache for generating gendered namespace names
//		* @param String[]|String $localInterwikis
//		*/
//		public function __construct(Language language, GenderCache $genderCache,
//			$localInterwikis = []
//		) {
//			$this->language = language;
//			$this->genderCache = $genderCache;
//			$this->localInterwikis = (array)$localInterwikis;
//		}
	public XomwMediaWikiTitleCodec(XomwLanguage language) {
		this.language = language;
	}

	/**
	* @see TitleFormatter::getNamespaceName()
	*
	* @param int $namespace
	* @param String $text
	*
	* @throws InvalidArgumentException If the namespace is invalid
	* @return String
	*/
	public byte[] getNamespaceName(int ns, byte[] text) {
		byte[] name = null;
//			if ($this->language->needsGenderDistinction() &&
//				XomwNamespace::hasGenderDistinction($namespace)
//			) {
//
//				// NOTE: we are assuming here that the title text is a user name!
//				$gender = $this->genderCache->getGenderOf($text, __METHOD__);
//				$name = $this->language->getGenderNsText($namespace, $gender);
//			} else {
			name = language.getNsText(ns);
//			}
//
//			if ($name === false) {
//				throw new InvalidArgumentException('Unknown namespace ID: ' . $namespace);
//			}

		return name;
	}

//		/**
//		* @see TitleFormatter::formatTitle()
//		*
//		* @param int|boolean $namespace The namespace ID (or false, if the namespace should be ignored)
//		* @param String $text The page title. Should be valid. Only minimal normalization is applied.
//		*        Underscores will be replaced.
//		* @param String $fragment The fragment name (may be empty).
//		* @param String $interwiki The interwiki name (may be empty).
//		*
//		* @throws InvalidArgumentException If the namespace is invalid
//		* @return String
//		*/
//		public function formatTitle($namespace, $text, $fragment = '', $interwiki = '') {
//			if ($namespace !== false) {
//				$namespace = $this->getNamespaceName($namespace, $text);
//
//				if ($namespace !== '') {
//					$text = $namespace . ':' . $text;
//				}
//			}
//
//			if ($fragment !== '') {
//				$text = $text . '#' . $fragment;
//			}
//
//			if ($interwiki !== '') {
//				$text = $interwiki . ':' . $text;
//			}
//
//			$text = str_replace('_', ' ', $text);
//
//			return $text;
//		}
//
//		/**
//		* Parses the given text and constructs a TitleValue. Normalization
//		* is applied according to the rules appropriate for the form specified by $form.
//		*
//		* @param String $text The text to parse
//		* @param int $defaultNamespace Namespace to assume per default (usually NS_MAIN)
//		*
//		* @throws XomwMalformedTitleException
//		* @return TitleValue
//		*/
//		public function parseTitle($text, $defaultNamespace) {
//			// NOTE: this is an ugly cludge that allows this class to share the
//			// code for parsing with the old Title class. The parser code should
//			// be refactored to avoid this.
//			$parts = $this->splitTitleString($text, $defaultNamespace);
//
//			// Relative fragment links are not supported by TitleValue
//			if ($parts['dbkey'] === '') {
//				throw new XomwMalformedTitleException('title-invalid-empty', $text);
//			}
//
//			return new TitleValue(
//				$parts['namespace'],
//				$parts['dbkey'],
//				$parts['fragment'],
//				$parts['interwiki']
//			);
//		}
//
//		/**
//		* @see TitleFormatter::getText()
//		*
//		* @param LinkTarget $title
//		*
//		* @return String $title->getText()
//		*/
//		public function getText(LinkTarget $title) {
//			return $this->formatTitle(false, $title->getText(), '');
//		}
//
//		/**
//		* @see TitleFormatter::getText()
//		*
//		* @param LinkTarget $title
//		*
//		* @return String
//		*/
//		public function getPrefixedText(LinkTarget $title) {
//			return $this->formatTitle(
//				$title->getNamespace(),
//				$title->getText(),
//				'',
//				$title->getInterwiki()
//			);
//		}
//
//		/**
//		* @since 1.27
//		* @see TitleFormatter::getPrefixedDBkey()
//		* @param LinkTarget $target
//		* @return String
//		*/
//		public function getPrefixedDBkey(LinkTarget $target) {
//			$key = '';
//			if ($target->isExternal()) {
//				$key .= $target->getInterwiki() . ':';
//			}
//			// Try to get a namespace name, but fallback
//			// to empty String if it doesn't exist
//			try {
//				$nsName = $this->getNamespaceName(
//					$target->getNamespace(),
//					$target->getText()
//				);
//			} catch (InvalidArgumentException $e) {
//				$nsName = '';
//			}
//
//			if ($target->getNamespace() !== 0) {
//				$key .= $nsName . ':';
//			}
//
//			$key .= $target->getText();
//
//			return strtr($key, ' ', '_');
//		}
//
//		/**
//		* @see TitleFormatter::getText()
//		*
//		* @param LinkTarget $title
//		*
//		* @return String
//		*/
//		public function getFullText(LinkTarget $title) {
//			return $this->formatTitle(
//				$title->getNamespace(),
//				$title->getText(),
//				$title->getFragment(),
//				$title->getInterwiki()
//			);
//		}

	/**
	* Normalizes and splits a title String.
	*
	* This function removes illegal characters, splits off the interwiki and
	* namespace prefixes, sets the other forms, and canonicalizes
	* everything.
	*
	* @todo this method is only exposed as a temporary measure to ease refactoring.
	* It was copied with minimal changes from Title::secureAndSplit().
	*
	* @todo This method should be split up and an appropriate interface
	* defined for use by the Title class.
	*
	* @param String $text
	* @param int $defaultNamespace
	*
	* @throws XomwMalformedTitleException If $text is not a valid title String.
	* @return array A map with the fields 'interwiki', 'fragment', 'namespace',
	*         'user_case_dbkey', and 'dbkey'.
	*/
	public XomwMediaWikiTitleCodecParts splitTitleString(byte[] text, int defaultNamespace) {
		byte[] dbkey = Php_str_.str_replace(Byte_ascii.Space, Byte_ascii.Underline, text);

		// Initialisation
		XomwMediaWikiTitleCodecParts parts = new XomwMediaWikiTitleCodecParts(dbkey, defaultNamespace);

		// Strip Unicode bidi override characters.
		// Sometimes they slip into cut-n-pasted page titles, where the
		// override chars get included in list displays.
//			dbkey = preg_replace('/\xE2\x80[\x8E\x8F\xAA-\xAE]/S', '', dbkey);

		// Clean up whitespace
		// Note: use of the /u option on preg_replace here will cause
		// input with invalid UTF-8 sequences to be nullified out in PHP 5.2.x,
		// conveniently disabling them.
//			dbkey = preg_replace(
//				'/[ _\xA0\x{1680}\x{180E}\x{2000}-\x{200A}\x{2028}\x{2029}\x{202F}\x{205F}\x{3000}]+/u',
//				'_',
//				dbkey
//			);
//			dbkey = trim(dbkey, '_');

//			if (strpos(dbkey, UtfNormal\Constants::UTF8_REPLACEMENT) !== false) {
//				// Contained illegal UTF-8 sequences or forbidden Unicode chars.
//				throw new XomwMalformedTitleException('title-invalid-utf8', text);
//			}

		parts.dbkey = dbkey;

		// Initial colon indicates main namespace rather than specified default
		// but should not create invalid {ns,title} pairs such as {0,Project:Foo}
//			if (dbkey !== '' && ':' == dbkey[0]) {
//				parts['namespace'] = NS_MAIN;
//				dbkey = substr(dbkey, 1); # remove the colon but continue processing
//				dbkey = trim(dbkey, '_'); # remove any subsequent whitespace
//			}

		if (dbkey == Bry_.Empty) {
			throw new XomwMalformedTitleException("title-invalid-empty", text);
		}

		// Namespace or interwiki prefix
		if (Bry_.Has_at_bgn(dbkey, Bry_.new_a7("File:"))) {
			parts.ns = XomwDefines.NS_FILE;
			dbkey = Bry_.Mid(dbkey, 5);
		}
//			$prefixRegexp = "/^(.+?)_*:_*(.*)$/S";
//			do {
//				$m = [];
//				if (preg_match($prefixRegexp, dbkey, $m)) {
//					$p = $m[1];
//					$ns = $this->language->getNsIndex($p);
//					if ($ns !== false) {
//						// Ordinary namespace
//						dbkey = $m[2];
//						parts['namespace'] = $ns;
//						// For Talk:X pages, check if X has a "namespace" prefix
//						if ($ns == NS_TALK && preg_match($prefixRegexp, dbkey, $x)) {
//							if ($this->language->getNsIndex($x[1])) {
//								// Disallow Talk:File:x type titles...
//								throw new XomwMalformedTitleException('title-invalid-talk-namespace', text);
//							} elseif (Interwiki::isValidInterwiki($x[1])) {
//								// TODO: get rid of global state!
//								// Disallow Talk:Interwiki:x type titles...
//								throw new XomwMalformedTitleException('title-invalid-talk-namespace', text);
//							}
//						}
//					} elseif (Interwiki::isValidInterwiki($p)) {
//						// Interwiki link
//						dbkey = $m[2];
//						parts['interwiki'] = $this->language->lc($p);
//
//						// Redundant interwiki prefix to the local wiki
//						foreach ($this->localInterwikis as $localIW) {
//							if (0 == strcasecmp(parts['interwiki'], $localIW)) {
//								if (dbkey == '') {
//									// Empty self-links should point to the Main Page, to ensure
//									// compatibility with cross-wiki transclusions and the like.
//									$mainPage = Title::newMainPage();
//									return [
//										'interwiki' => $mainPage->getInterwiki(),
//										'local_interwiki' => true,
//										'fragment' => $mainPage->getFragment(),
//										'namespace' => $mainPage->getNamespace(),
//										'dbkey' => $mainPage->getDBkey(),
//										'user_case_dbkey' => $mainPage->getUserCaseDBKey()
//									];
//								}
//								parts['interwiki'] = '';
//								// local interwikis should behave like initial-colon links
//								parts['local_interwiki'] = true;
//
//								// Do another namespace split...
//								continue 2;
//							}
//						}
//
//						// If there's an initial colon after the interwiki, that also
//						// resets the default namespace
//						if (dbkey !== '' && dbkey[0] == ':') {
//							parts['namespace'] = NS_MAIN;
//							dbkey = substr(dbkey, 1);
//						}
//					}
//					// If there's no recognized interwiki or namespace,
//					// then let the colon expression be part of the title.
//				}
//				break;
//			} while (true);

//			$fragment = strstr(dbkey, '#');
//			if (false !== $fragment) {
//				parts['fragment'] = str_replace('_', ' ', substr($fragment, 1));
//				dbkey = substr(dbkey, 0, strlen(dbkey) - strlen($fragment));
//				// remove whitespace again: prevents "Foo_bar_#"
//				// becoming "Foo_bar_"
//				dbkey = preg_replace('/_*$/', '', dbkey);
//			}

		// Reject illegal characters.
//			$rxTc = self::getTitleInvalidRegex();
//			$matches = [];
//			if (preg_match($rxTc, dbkey, $matches)) {
//				throw new XomwMalformedTitleException('title-invalid-characters', text, [ $matches[0] ]);
//			}

		// Pages with "/./" or "/../" appearing in the URLs will often be un-
		// reachable due to the way web browsers deal with 'relative' URLs.
		// Also, they conflict with subpage syntax.  Forbid them explicitly.
//			if (
//				strpos(dbkey, '.') !== false &&
//				(
//					dbkey === '.' || dbkey === '..' ||
//					strpos(dbkey, './') === 0 ||
//					strpos(dbkey, '../') === 0 ||
//					strpos(dbkey, '/./') !== false ||
//					strpos(dbkey, '/../') !== false ||
//					substr(dbkey, -2) == '/.' ||
//					substr(dbkey, -3) == '/..'
//				)
//			) {
//				throw new XomwMalformedTitleException('title-invalid-relative', text);
//			}

		// Magic tilde sequences? Nu-uh!
//			if (strpos(dbkey, '~~~') !== false) {
//				throw new XomwMalformedTitleException('title-invalid-magic-tilde', text);
//			}

		// Limit the size of titles to 255 bytes. This is typically the size of the
		// underlying database field. We make an exception for special pages, which
		// don't need to be stored in the database, and may edge over 255 bytes due
		// to subpage syntax for long titles, e.g. [[Special:Block/Long name]]
//			$maxLength = (parts['namespace'] != NS_SPECIAL) ? 255 : 512;
//			if (strlen(dbkey) > $maxLength) {
//				throw new XomwMalformedTitleException('title-invalid-too-long', text,
//					[ Message::numParam($maxLength) ]);
//			}

		// Normally, all wiki links are forced to have an initial capital letter so [[foo]]
		// and [[Foo]] point to the same place.  Don't force it for interwikis, since the
		// other site might be case-sensitive.
//			parts['user_case_dbkey'] = dbkey;
//			if (parts['interwiki'] === '') {
//				dbkey = Title::capitalize(dbkey, parts['namespace']);
//			}

		// Can't make a link to a namespace alone... "empty" local links can only be
		// self-links with a fragment identifier.
//			if (dbkey == '' && parts['interwiki'] === '') {
//				if (parts['namespace'] != NS_MAIN) {
//					throw new XomwMalformedTitleException('title-invalid-empty', text);
//				}
//			}

		// Allow IPv6 usernames to start with '::' by canonicalizing IPv6 titles.
		// IP names are not allowed for accounts, and can only be referring to
		// edits from the IP. Given '::' abbreviations and caps/lowercaps,
		// there are numerous ways to present the same IP. Having sp:contribs scan
		// them all is silly and having some show the edits and others not is
		// inconsistent. Same for talk/userpages. Keep them normalized instead.
//			if (parts['namespace'] == NS_USER || parts['namespace'] == NS_USER_TALK) {
//				dbkey = IP::sanitizeIP(dbkey);
//			}

		// Any remaining initial :s are illegal.
		if (dbkey != Bry_.Empty && Byte_ascii.Colon == dbkey[0]) {
			throw new XomwMalformedTitleException("title-invalid-leading-colon", text);
		}

		// Fill fields
		parts.dbkey = dbkey;

		return parts;
	}

//		/**
//		* Returns a simple regex that will match on characters and sequences invalid in titles.
//		* Note that this doesn't pick up many things that could be wrong with titles, but that
//		* replacing this regex with something valid will make many titles valid.
//		* Previously Title::getTitleInvalidRegex()
//		*
//		* @return String Regex String
//		* @since 1.25
//		*/
//		public static function getTitleInvalidRegex() {
//			static $rxTc = false;
//			if (!$rxTc) {
//				// Matching titles will be held as illegal.
//				$rxTc = '/' .
//					// Any character not allowed is forbidden...
//					'[^' . Title::legalChars() . ']' .
//					// URL percent encoding sequences interfere with the ability
//					// to round-trip titles -- you can't link to them consistently.
//					'|%[0-9A-Fa-f]{2}' .
//					// XML/HTML character references produce similar issues.
//					'|&[A-Za-z0-9\x80-\xff]+;' .
//					'|&#[0-9]+;' .
//					'|&#x[0-9A-Fa-f]+;' .
//					'/S';
//			}
//
//			return $rxTc;
//		}
}