Smutty
MVC Framework
View Code: Smutty_Config
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<?php
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/**
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* this class creates allows access to config files in
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* an easy way. normally for Smutty a singleton instance
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* is maintained (accessed through getInstance())
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*
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* @see getInstance()
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*
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*/
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class Smutty_Config extends Smutty_Object {
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/** data store */
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private $data;
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/** the singleton */
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private static $instance = null;
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/** get cache */
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private $getCache;
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/**
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* constructor. creates a new config class.
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*
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* @return nothing
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*
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*/
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$this->data = array();
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$this->getCache = array();
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}
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/**
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* loads the config with data from the specified file. this will
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* not overwrite any data, so it can be called multiple times
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* to load data from multiple config files.
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*
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* @param String $path path to file to load
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* @return nothing
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*
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*/
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if ( !$f = @fopen($path,'r') )
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Smutty_Error::fatal( 'config file not found: ' . $path, 'SmuttyConfig' );
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while ( $line = fgets($f) )
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$this->loadLine( $line );
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fclose( $f );
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}
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/**
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* this function loads the default config files
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*
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* @return nothing
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*
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*/
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$this->loadConfig( 'library/smutty.cfg' );
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$this->loadConfig( 'application/app.cfg' );
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}
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/**
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* processes a single line of configuration info
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*
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* @param String $line the line to parse
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* @return nothing
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*
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*/
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if ( $line[0] == '#' )
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return; // skip comments
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// break the line into name and value
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preg_match( '/^([\w_\.]*\*{0,1})\s*=\s*([\d\w\/_ ,]*)\s*/', $line, $matches );
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if ( $matches ) {
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$name = trim( $matches[1] );
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$value = trim( $matches[2] );
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if ( $name && $value )
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$this->data[ $name ] = $value;
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}
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}
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/**
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* looks for a config setting matching the given
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* name. you can use a "*" as a wildcard
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*
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* @param String $name setting name
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* @return String the config value
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*
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*/
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// check for an exact match
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if ( isset($this->data[$name]) )
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return $this->data[$name];
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// cache hit?
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elseif ( isset($this->getCache[$name]) )
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return $this->getCache[$name];
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// are we looking to for multiple matches?
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elseif ( strpos($name,'*') ) {
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$vars = array();
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$regexp = $this->getWildcardRegExp( $name );
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foreach ( $this->data as $key => $value )
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if ( preg_match($regexp,$key) )
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$vars[ $key ] = $value;
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$this->getCache[$name] = $vars;
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return $vars;
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}
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// lastly, check for wildcards in the spec
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// eg. route.ctlr.prefix* = whatever
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else foreach ( $this->data as $key => $value )
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if ( strpos($key,'*') ) {
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$regexp = $this->getWildcardRegExp( $key );
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if ( preg_match($regexp,$name) ) {
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$this->getCache[$name] = $value;
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return $value;
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}
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}
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$this->getCache[$name] = '';
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return '';
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}
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/**
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* converts a string into a regexp where wildcards (*'s)
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* will be matched in it.
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*
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* @param String $name the string to convert
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* @return String the regexp
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*
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*/
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$regexp = '/^' . str_replace('.','\\.',$name) . '$/';
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$regexp = str_replace( '*','.*', $regexp );
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return $regexp;
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}
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/**
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* returns the singleton for this object
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*
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* @return Smutty_Config the singleton
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*
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*/
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public static function &getInstance() {
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if ( self::$instance == null )
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self::$instance = new Smutty_Config();
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return self::$instance;
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}
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}
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?>
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