it.php

来自「视频监控网络部分的协议ddns,的模块的实现代码,请大家大胆指正.」· PHP 代码 · 共 793 行 · 第 1/2 页

    * @see      parseCurrentBlock()
    * @throws   IT_Error
    */
    function parse($block = "__global__", $flag_recursion = false) {

        if (!isset($this->blocklist[$block])) {
            return new IT_Error("The block '$block' was not found in the template.", __FILE__, __LINE__);
            return false;
        }

        if ("__global__" == $block)
            $this->flagGlobalParsed = true;
            
        $regs = array();
        $values = array();

        if ($this->clearCacheOnParse) {
            
            foreach ($this->variableCache as $name => $value) {
                $regs[] = "@" . $this->openingDelimiter . $name . $this->closingDelimiter . "@";
                $values[] = $value;
            }
            $this->variableCache = array();
        
        } else {

            foreach ($this->blockvariables[$block] as $allowedvar => $v) {
        
                if (isset($this->variableCache[$allowedvar])) {
                   $regs[]   = "@".$this->openingDelimiter . $allowedvar . $this->closingDelimiter . "@";
                   $values[] = $this->variableCache[$allowedvar];
                    unset($this->variableCache[$allowedvar]);
                }

            }        
            
        }

        $outer = (0 == count($regs)) ? $this->blocklist[$block] : preg_replace($regs, $values, $this->blocklist[$block]);
        $empty = (0 == count($values)) ? true : false;

        if (isset($this->blockinner[$block])) {
        
          foreach ($this->blockinner[$block] as $k => $innerblock) {

            $this->parse($innerblock, true);
                if ("" != $this->blockdata[$innerblock])
                    $empty = false;

                $placeholder = $this->openingDelimiter . "__" . $innerblock . "__" . $this->closingDelimiter;                
                $outer = str_replace($placeholder, $this->blockdata[$innerblock], $outer);
                $this->blockdata[$innerblock] = "";                
          }
            
        }

        if ($this->removeUnknownVariables)
            $outer = preg_replace($this->removeVariablesRegExp, "", $outer);

        if ($empty) {

            if (!$this->removeEmptyBlocks) {
            
                $this->blockdata[$block ].= $outer;
                
            } else {

                if (isset($this->touchedBlocks[$block])) {
                    $this->blockdata[$block] .= $outer;
                    unset($this->touchedBlocks[$block]);
                }
                
            }
                
        } else {
        
            $this->blockdata[$block] .= $outer;
        
        }

        return $empty;
    } // end func parse

    /**
    * Parses the current block
    * @see      parse(), setCurrentBlock(), $currentBlock
    * @access   public
    */
    function parseCurrentBlock() {
        return $this->parse($this->currentBlock);
    } // end func parseCurrentBlock

    /**
    * Sets a variable value.
    * 
    * The function can be used eighter like setVariable( "varname", "value")
    * or with one array $variables["varname"] = "value" given setVariable($variables)
    * quite like phplib templates set_var().
    * 
    * @param    mixed     string with the variable name or an array %variables["varname"] = "value"
    * @param    string    value of the variable or empty if $variable is an array.
    * @param    string    prefix for variable names
    * @access   public
    */    
    function setVariable($variable, $value = "") {
        
        if (is_array($variable)) {
        
            $this->variableCache = array_merge($this->variableCache, $variable);
                
        } else {
            
            $this->variableCache[$variable] = $value;
            
        }
    
    } // end func setVariable
    
    /**
    * Sets the name of the current block that is the block where variables are added.
    *
    * @param    string      name of the block 
    * @return   boolean     false on failure, otherwise true
    * @throws   IT_Error
    * @access   public
    */
    function setCurrentBlock($block = "__global__") {
    
        if (!isset($this->blocklist[$block]))
            return new IT_Error("Can't find the block '$block' in the template.", __FILE__, __LINE__);
            
        $this->currentBlock = $block;
        
        return true;
    } // end func setCurrentBlock
    
    /**
    * Preserves an empty block even if removeEmptyBlocks is true.
    *
    * @param    string      name of the block
    * @return   boolean     false on false, otherwise true
    * @throws   IT_Error    
    * @access   public
    * @see      $removeEmptyBlocks
    */
    function touchBlock($block) {
        
        if (!isset($this->blocklist[$block]))
            return new IT_Error("Can't find the block '$block' in the template.", __FILE__, __LINE__);
        
        $this->touchedBlocks[$block] = true;
        
        return true;
    } // end func touchBlock
    
    /**
    * Clears all datafields of the object and rebuild the internal blocklist
    * 
    * LoadTemplatefile() and setTemplate() automatically call this function 
    * when a new template is given. Don't use this function 
    * unless you know what you're doing.
    *
    * @access   public
    * @see      free()
    */
    function init() {
    
        $this->free();
        $this->findBlocks($this->template);
        // we don't need it any more
        $this->template = '';
        $this->buildBlockvariablelist();
        
    } // end func init
    
    /**
    * Clears all datafields of the object.
    * 
    * Don't use this function unless you know what you're doing.
    *
    * @access   public
    * @see      init()
    */
    function free() {
    
        $this->err = array();
        
        $this->currentBlock = "__global__";
        
        $this->variableCache    = array();        
        $this->blocklookup      = array();
        $this->touchedBlocks    = array();
        
        $this->flagBlocktrouble = false;
        $this->flagGlobalParsed = false;
        
    } // end func free
    
    /**
    * Sets the template.
    *  
    * You can eighter load a template file from disk with LoadTemplatefile() or set the 
    * template manually using this function.
    * 
    * @param        string      template content
    * @param        boolean     remove unknown/unused variables?
    * @param        boolean     remove empty blocks?
    * @see          LoadTemplatefile(), $template
    * @access       public
    */
    function setTemplate($template, $removeUnknownVariables = true, $removeEmptyBlocks = true) {
                
        $this->removeUnknownVariables = $removeUnknownVariables;
        $this->removeEmptyBlocks = $removeEmptyBlocks;
        
        if ("" == $template && $this->flagCacheTemplatefile) {
        
            $this->variableCache = array();
            $this->blockdata = array();
            $this->touchedBlocks = array();
            $this->currentBlock = "__global__";
            
        } else {
        
            $this->template = '<!-- BEGIN __global__ -->' . $template . '<!-- END __global__ -->';
            $this->init();
            
        }
        
        if ($this->flagBlocktrouble)
            return false;
        
        return true;
    } // end func setTemplate
    
    /**
    * Reads a template file from the disk.
    *
    * @param    string      name of the template file
    * @param    bool        how to handle unknown variables.
    * @param    bool        how to handle empty blocks. 
    * @access   public
    * @return   boolean    false on failure, otherwise true
    * @see      $template, setTemplate(), $removeUnknownVariables, $removeEmptyBlocks
    */
    function loadTemplatefile($filename, $removeUnknownVariables = true, $removeEmptyBlocks = true) {

        $template = "";        
        if (!$this->flagCacheTemplatefile || $this->lastTemplatefile != $filename)
            $template = $this->getfile($filename);
            
        $this->lastTemplatefile = $filename;
        
        return $this->setTemplate($template, $removeUnknownVariables, $removeEmptyBlocks);
    } // end func LoadTemplatefile
    
    /**
    * Sets the file root. The file root gets prefixed to all filenames passed to the object.
    * 
    * Make sure that you override this function when using the class
    * on windows.
    * 
    * @param    string
    * @see      IntegratedTemplate()
    * @access   public
    */
    function setRoot($root) {
        
        if ("" != $root && "/" != substr($root, -1))
            $root .= "/";
        
        $this->fileRoot = $root;
        
    } // end func setRoot

    /**
    * Build a list of all variables within of a block
    */    
    function buildBlockvariablelist() {

        foreach ($this->blocklist as $name => $content) {
            preg_match_all( $this->variablesRegExp, $content, $regs );

            if (0 != count($regs[1])) {

                foreach ($regs[1] as $k => $var)             
                    $this->blockvariables[$name][$var] = true;
                    
            } else {
            
                $this->blockvariables[$name] = array();
                
            }
                
        }    
        
    } // end func buildBlockvariablelist
    
    /**
    * Returns a list of all 
    */
    function getGlobalvariables() {

        $regs   = array();
        $values = array();

        foreach ($this->blockvariables["__global__"] as $allowedvar => $v) {
            
            if (isset($this->variableCache[$allowedvar])) {
                $regs[]   = "@" . $this->openingDelimiter . $allowedvar . $this->closingDelimiter."@";
                $values[] = $this->variableCache[$allowedvar];
                unset($this->variableCache[$allowedvar]);
            }
            
        }
        
        return array($regs, $values);
    } // end func getGlobalvariables

    /**
    * Recusively builds a list of all blocks within the template.
    *
    * @param    string    string that gets scanned
    * @see      $blocklist
    */    
    function findBlocks($string) {

        $blocklist = array();

        if (preg_match_all($this->blockRegExp, $string, $regs, PREG_SET_ORDER)) {
            
            foreach ($regs as $k => $match) {
            
                $blockname         = $match[1];
                $blockcontent = $match[2];
            
                if (isset($this->blocklist[$blockname])) {
                    new IT_Error("The name of a block must be unique within a template. Found '$blockname' twice. Unpredictable results may appear.", __FILE__, __LINE__);
                    $this->flagBlocktrouble = true;
                }                

                $this->blocklist[$blockname] = $blockcontent;
                $this->blockdata[$blockname] = "";

                $blocklist[] = $blockname;
                
                $inner = $this->findBlocks($blockcontent);
                foreach ($inner as $k => $name) {

                    $pattern = sprintf('@<!--\s+BEGIN\s+%s\s+-->(.*)<!--\s+END\s+%s\s+-->@sm', 
                                                    $name,
                                                    $name
                                                );

                    $this->blocklist[$blockname] = preg_replace(    $pattern, 
                                                                    $this->openingDelimiter . "__" . $name . "__" . $this->closingDelimiter, 
                                                                    $this->blocklist[$blockname]
                                                               );
                    $this->blockinner[$blockname][] = $name;
                    $this->blockparents[$name] = $blockname;
                    
                }
                
            }
            
        }

        return $blocklist;
    } // end func findBlocks

    /**
    * Reads a file from disk and returns its content.
    * @param    string    Filename
    * @return   string    Filecontent
    */    
    function getFile($filename) {
        
        if ("/" == $filename{0} && "/" == substr($this->fileRoot, -1)) 
            $filename = substr($filename, 1);
            
        $filename = $this->fileRoot . $filename;
        
        if (!($fh = @fopen($filename, "r"))) {
            new IT_Error("Can't read '$filename'.", __FILE__, __LINE__);
            return "";
        }
    
        $content = fread($fh, filesize($filename));
        fclose($fh);
        
        return preg_replace("#<!-- INCLUDE (.*) -->#ime", "\$this->getFile('\\1')", $content);
    } // end func getFile
    
} // end class IntegratedTemplate
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