237 lines
6 KiB
PHP
Executable file
237 lines
6 KiB
PHP
Executable file
<?php
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define("DF_ALL", -1);
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define("DF_NONE", 0);
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define("DF_MDY", 1);
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define("DF_DMY", 2);
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define("DF_YMD", 3);
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define("DF_ISO1", 4);
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define("DF_LASTPREF", 4);
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define("DF_ISO2", 5);
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define("DF_YDM", 6);
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define("DF_DM", 7);
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define("DF_MD", 8);
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define("DF_LAST", 8);
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# To do: preferences, OutputPage
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class DateFormatter
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{
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var $mSource, $mTarget;
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var $monthNames = '', $rxDM, $rxMD, $rxDMY, $rxYDM, $rxMDY, $rxYMD;
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var $regexes, $pDays, $pMonths, $pYears;
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var $rules, $xMonths;
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function DateFormatter()
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{
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global $wgMonthNamesEn, $wgInputEncoding;
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$this->monthNames = $this->getMonthRegex();
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for ( $i=1; $i<=12; $i++ ) {
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$this->xMonths[strtolower( $wgMonthNamesEn[$i-1] )] = $i;
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}
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# Attempt at UTF-8 support, untested at the moment
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if ( $wgInputEncoding == 'UTF-8' ) {
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$this->regexTrail = '(?![a-z])/iu';
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} else {
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$this->regexTrail = '(?![a-z])/i';
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}
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# Partial regular expressions
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$this->prxDM = '\[\[(\d{1,2})[ _](' . $this->monthNames . ')]]';
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$this->prxMD = '\[\[(' . $this->monthNames . ')[ _](\d{1,2})]]';
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$this->prxY = '\[\[(\d{1,4}([ _]BC|))]]';
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$this->prxISO1 = '\[\[(-?\d{4})]]-\[\[(\d{2})-(\d{2})]]';
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$this->prxISO2 = '\[\[(-?\d{4})-(\d{2})-(\d{2})]]';
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# Real regular expressions
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$this->regexes[DF_DMY] = "/{$this->prxDM} *,? *{$this->prxY}{$this->regexTrail}";
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$this->regexes[DF_YDM] = "/{$this->prxY} *,? *{$this->prxDM}{$this->regexTrail}";
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$this->regexes[DF_MDY] = "/{$this->prxMD} *,? *{$this->prxY}{$this->regexTrail}";
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$this->regexes[DF_YMD] = "/{$this->prxY} *,? *{$this->prxMD}{$this->regexTrail}";
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$this->regexes[DF_DM] = "/{$this->prxDM}{$this->regexTrail}";
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$this->regexes[DF_MD] = "/{$this->prxMD}{$this->regexTrail}";
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$this->regexes[DF_ISO1] = "/{$this->prxISO1}{$this->regexTrail}";
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$this->regexes[DF_ISO2] = "/{$this->prxISO2}{$this->regexTrail}";
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# Extraction keys
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# See the comments in replace() for the meaning of the letters
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$this->keys[DF_DMY] = 'jFY';
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$this->keys[DF_YDM] = 'Y jF';
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$this->keys[DF_MDY] = 'FjY';
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$this->keys[DF_YMD] = 'Y Fj';
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$this->keys[DF_DM] = 'jF';
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$this->keys[DF_MD] = 'Fj';
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$this->keys[DF_ISO1] = 'ymd'; # y means ISO year
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$this->keys[DF_ISO2] = 'ymd';
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# Target date formats
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$this->targets[DF_DMY] = '[[F j|j F]] [[Y]]';
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$this->targets[DF_YDM] = '[[Y]], [[F j|j F]]';
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$this->targets[DF_MDY] = '[[F j]], [[Y]]';
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$this->targets[DF_YMD] = '[[Y]] [[F j]]';
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$this->targets[DF_DM] = '[[F j|j F]]';
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$this->targets[DF_MD] = '[[F j]]';
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$this->targets[DF_ISO1] = '[[Y|y]]-[[F j|m-d]]';
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$this->targets[DF_ISO2] = '[[y-m-d]]';
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# Rules
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# pref source target
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$this->rules[DF_DMY][DF_MD] = DF_DM;
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$this->rules[DF_ALL][DF_MD] = DF_MD;
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$this->rules[DF_MDY][DF_DM] = DF_MD;
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$this->rules[DF_ALL][DF_DM] = DF_DM;
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$this->rules[DF_NONE][DF_ISO2] = DF_ISO1;
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}
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function reformat( $preference, $text )
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{
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for ( $i=1; $i<=DF_LAST; $i++ ) {
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$this->mSource = $i;
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if ( @$this->rules[$preference][$i] ) {
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# Specific rules
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$this->mTarget = $this->rules[$preference][$i];
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} elseif ( @$this->rules[DF_ALL][$i] ) {
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# General rules
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$this->mTarget = $this->rules[DF_ALL][$i];
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} elseif ( $preference ) {
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# User preference
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$this->mTarget = $preference;
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} else {
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# Default
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$this->mTarget = $i;
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}
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$text = preg_replace_callback( $this->regexes[$i], 'wfMainDateReplace', $text );
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}
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return $text;
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}
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function replace( $matches )
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{
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global $wgMonthNamesEn;
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# Extract information from $matches
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$bits = array();
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$key = $this->keys[$this->mSource];
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for ( $p=0; $p < strlen($key); $p++ ) {
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if ( $key{$p} != ' ' ) {
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$bits[$key{$p}] = $matches[$p+1];
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}
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}
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$format = $this->targets[$this->mTarget];
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# Construct new date
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$text = '';
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$fail = false;
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for ( $p=0; $p < strlen( $format ); $p++ ) {
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$char = $format{$p};
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switch ( $char ) {
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case 'd': # ISO day of month
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if ( is_null($bits['d']) ) {
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$text .= sprintf( '%02d', $bits['j'] );
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} else {
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$text .= $bits['d'];
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}
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break;
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case 'm': # ISO month
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if ( is_null($bits['m']) ) {
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$m = $this->makeIsoMonth( $bits['F'] );
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if ( !$m || $m == '00' ) {
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$fail = true;
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} else {
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$text .= $m;
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}
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} else {
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$text .= $bits['m'];
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}
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break;
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case 'y': # ISO year
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if ( is_null( $bits['y'] ) ) {
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$text .= $this->makeIsoYear( $bits['Y'] );
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} else {
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$text .= $bits['y'];
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}
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break;
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case 'j': # ordinary day of month
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if ( is_null($bits['j']) ) {
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$text .= IntVal( $bits['d'] );
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} else {
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$text .= $bits['j'];
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}
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break;
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case 'F': # long month
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if ( is_null( $bits['F'] ) ) {
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$m = IntVal($bits['m']);
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if ( $m > 12 || $m < 1 ) {
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$fail = true;
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} else {
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$text .= $wgMonthNamesEn[$m-1];
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}
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} else {
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$text .= ucfirst( $bits['F'] );
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}
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break;
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case 'Y': # ordinary (optional BC) year
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if ( is_null( $bits['Y'] ) ) {
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$text .= $this->makeNormalYear( $bits['y'] );
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} else {
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$text .= $bits['Y'];
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}
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break;
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default:
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$text .= $char;
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}
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}
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if ( $fail ) {
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$text = $matches[0];
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}
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return $text;
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}
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function getMonthRegex()
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{
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global $wgMonthNamesEn;
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return implode( '|', $wgMonthNamesEn );
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}
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# Makes an ISO month, e.g. 02, from a month name
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function makeIsoMonth( $monthName )
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{
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$n = $this->xMonths[strtolower( $monthName )];
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return sprintf( '%02d', $n );
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}
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function makeIsoYear( $year )
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{
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# Assumes the year is in a nice format, as enforced by the regex
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if ( substr( $year, -2 ) == 'BC' ) {
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$num = IntVal(substr( $year, 0, -3 )) - 1;
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# PHP bug note: sprintf( "%04d", -1 ) fails poorly
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$text = sprintf( '-%04d', $num );
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} else {
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$text = sprintf( '%04d', $year );
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}
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return $text;
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}
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function makeNormalYear( $iso )
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{
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if ( $iso{0} == '-' ) {
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$text = (IntVal( substr( $iso, 1 ) ) - 1) . ' BC';
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} else {
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$text = IntVal( $iso );
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}
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return $text;
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}
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}
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function wfMainDateReplace( $matches )
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{
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global $wgDateFormatter;
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return $wgDateFormatter->replace( $matches );
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}
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?>
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