128 lines
3.0 KiB
PHP
128 lines
3.0 KiB
PHP
<?php
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class PHPBuilder {
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static function build () {
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return new PHPBuilder() ;
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}
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function __construct() {
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$this->lines = array() ;
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}
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function l() {
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foreach ( func_get_args() as $lines ) {
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if ( !$lines ) continue ;
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if ( is_string( $lines ) ) $lines = preg_split( '/\r\n|\r|\n/', $lines ?? '' ) ;
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if ( !$lines ) continue ;
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if ( $lines instanceof PHPBuilder ) $lines = $lines->lines ;
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else $lines = array_map( 'ltrim', $lines ?? [] ) ;
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if ( !$lines ) continue ;
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$this->lines = array_merge( $this->lines, $lines ) ;
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}
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return $this ;
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}
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function b() {
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$args = func_get_args() ;
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$entry = array_shift( $args ) ;
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$block = new PHPBuilder() ;
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call_user_func_array( array( $block, 'l' ), $args ?? [] ) ;
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$this->lines[] = array( $entry, $block->lines ) ;
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return $this ;
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}
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function replace( $replacements, &$array = NULL ) {
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if ( $array === NULL ) {
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unset( $array ) ;
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$array =& $this->lines ;
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}
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$i = 0 ;
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while ( $i < count( $array ?? [] ) ) {
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/* Recurse into blocks */
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if ( is_array( $array[$i] ) ) {
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$this->replace( $replacements, $array[$i][1] ) ;
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if ( count( $array[$i][1] ?? [] ) == 0 ) {
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$nextelse = isset( $array[$i+1] ) && is_array( $array[$i+1] ) && preg_match( '/^\s*else\s*$/i', $array[$i+1][0] ?? '' ) ;
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$delete = preg_match( '/^\s*else\s*$/i', $array[$i][0] ?? '' ) ;
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$delete = $delete || ( preg_match( '/^\s*if\s*\(/i', $array[$i][0] ?? '' ) && !$nextelse ) ;
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if ( $delete ) {
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// Is this always safe? Not if the expression has side-effects.
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// print "/* REMOVING EMPTY BLOCK: " . $array[$i][0] . "*/\n" ;
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array_splice( $array, $i ?? 0, 1 ) ;
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continue ;
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}
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}
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}
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/* Handle replacing lines with NULL to remove, or string, array of strings or PHPBuilder to replace */
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else {
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if ( array_key_exists( $array[$i], $replacements ?? [] ) ) {
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$rep = $replacements[$array[$i]] ;
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if ( $rep === NULL ) {
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array_splice( $array, $i ?? 0, 1 ) ;
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continue ;
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}
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if ( is_string( $rep ) ) {
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$array[$i] = $rep ;
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$i++ ;
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continue ;
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}
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if ( $rep instanceof PHPBuilder ) $rep = $rep->lines ;
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if ( is_array( $rep ) ) {
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array_splice( $array, $i ?? 0, 1, $rep ) ; $i += count( $rep ?? [] ) + 1 ;
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continue ;
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}
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throw 'Unknown type passed to PHPBuilder#replace' ;
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}
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}
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$i++ ;
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}
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return $this ;
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}
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function render( $array = NULL, $indent = "" ) {
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if ( $array === NULL ) $array = $this->lines ;
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$out = array() ;
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foreach( $array as $line ) {
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if ( is_array( $line ) ) {
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list( $entry, $block ) = $line ;
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$str = $this->render( $block, $indent . "\t" ) ;
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if ( strlen( $str ?? '' ) < 40 ) {
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$out[] = $indent . $entry . ' { ' . ltrim( $str ?? '' ) . ' }' ;
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}
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else {
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$out[] = $indent . $entry . ' {' ;
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$out[] = $str ;
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$out[] = $indent . '}' ;
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}
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}
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else {
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$out[] = $indent . $line ;
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}
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}
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return implode( PHP_EOL, $out ) ;
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}
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}
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