mirror of
https://github.com/Combodo/iTop.git
synced 2026-02-13 07:24:13 +01:00
650 lines
19 KiB
PHP
650 lines
19 KiB
PHP
<?php
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/**
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* Copyright (C) 2013-2020 Combodo SARL
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*
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* This file is part of iTop.
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*
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* iTop is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* iTop is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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*/
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/**
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* Class ThemeHandler
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*
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* @author Stephen Abello <stephen.abello@combodo.com>
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* @since 2.7.0
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*/
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class ThemeHandler
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{
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private static $oCompileCSSService;
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/**
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* Return default theme name and parameters
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*
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* @return array
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* @since 2.7.0
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*/
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public static function GetDefaultThemeInformation()
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{
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return array(
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'name' => 'light-grey',
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'parameters' => array(
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'variables' => array(),
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'imports' => array(
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'css-variables' => '../css/css-variables.scss',
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),
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'stylesheets' => array(
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'jqueryui' => '../css/ui-lightness/jqueryui.scss',
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'main' => '../css/light-grey.scss',
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),
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),
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);
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}
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/**
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* Return the ID of the theme currently defined in the config. file
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*
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* @return string
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*/
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public static function GetCurrentThemeId()
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{
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try
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{
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$sThemeId = MetaModel::GetConfig()->Get('backoffice_default_theme');
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}
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catch(CoreException $oCompileException)
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{
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// Fallback on our default theme in case the config. is not available yet
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$aDefaultTheme = ThemeHandler::GetDefaultThemeInformation();
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$sThemeId = $aDefaultTheme['name'];
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}
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return $sThemeId;
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}
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/**
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* Return the absolute path of the compiled theme folder.
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*
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* @param string $sThemeId
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*
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* @return string
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*/
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public static function GetCompiledThemeFolderAbsolutePath($sThemeId)
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{
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return APPROOT.'env-'.utils::GetCurrentEnvironment().'/branding/themes/'.$sThemeId.'/';
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}
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/**
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* Return the absolute URL for the current theme CSS file
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*
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* @return string
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* @throws \Exception
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*/
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public static function GetCurrentThemeUrl()
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{
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try
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{
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// Try to compile theme defined in the configuration
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$sThemeId = static::GetCurrentThemeId();
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static::CompileTheme($sThemeId);
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}
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catch(CoreException $oCompileException)
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{
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// Fallback on our default theme (should always be compilable) in case the previous theme doesn't exists
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$aDefaultTheme = ThemeHandler::GetDefaultThemeInformation();
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$sThemeId = $aDefaultTheme['name'];
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$sDefaultThemeDirPath = static::GetCompiledThemeFolderAbsolutePath($sThemeId);
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// Create our theme dir if it doesn't exist (XML theme node removed, renamed etc..)
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if(!is_dir($sDefaultThemeDirPath))
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{
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SetupUtils::builddir($sDefaultThemeDirPath);
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}
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static::CompileTheme($sThemeId, false, $aDefaultTheme['parameters']);
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}
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// Return absolute url to theme compiled css
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return utils::GetAbsoluteUrlModulesRoot().'/branding/themes/'.$sThemeId.'/main.css';
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}
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/**
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* Compile the $sThemeId theme, the actual compilation is skipped when either
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* 1) The produced CSS file exists and is more recent than any of its components (imports, stylesheets)
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* 2) The produced CSS file exists and its signature is equal to the expected signature (imports, stylesheets, variables)
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*
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* @param string $sThemeId
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* @param bool $bSetup : indicated whether compilation is performed in setup context (true) or when loading a page/theme (false)
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* @param array|null $aThemeParameters Parameters (variables, imports, stylesheets) for the theme, if not passed, will be retrieved from compiled DM
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* @param array|null $aImportsPaths Paths where imports can be found. Must end with '/'
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* @param string|null $sWorkingPath Path of the folder used during compilation. Must end with a '/'
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*
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* @throws \CoreException
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*/
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public static function CompileTheme($sThemeId, $bSetup=false, $aThemeParameters = null, $aImportsPaths = null, $sWorkingPath = null)
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{
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// Default working path
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if($sWorkingPath === null)
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{
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$sWorkingPath = APPROOT.'env-'.utils::GetCurrentEnvironment().'/';
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}
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// Default import paths (env-*)
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if($aImportsPaths === null)
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{
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$aImportsPaths = array(
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APPROOT.'env-'.utils::GetCurrentEnvironment().'/',
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);
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}
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// Note: We do NOT check that the folder exists!
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$sThemeFolderPath = $sWorkingPath.'/branding/themes/'.$sThemeId.'/';
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$sThemeCssPath = $sThemeFolderPath.'main.css';
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// Save parameters if passed... (typically during DM compilation)
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if(is_array($aThemeParameters))
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{
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if (!is_dir($sThemeFolderPath))
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{
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mkdir($sWorkingPath.'/branding/');
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mkdir($sWorkingPath.'/branding/themes/');
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}
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file_put_contents($sThemeFolderPath.'/theme-parameters.json', json_encode($aThemeParameters));
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}
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// ... Otherwise, retrieve them from compiled DM (typically when switching current theme in the config. file)
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else
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{
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$aThemeParameters = json_decode(@file_get_contents($sThemeFolderPath.'theme-parameters.json'), true);
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if ($aThemeParameters === null)
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{
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throw new CoreException('Could not load "'.$sThemeId.'" theme parameters from file, check that it has been compiled correctly');
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}
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}
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$sTmpThemeScssContent = '';
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$iStyleLastModified = 0;
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clearstatcache();
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// Loading files to import and stylesheet to compile, also getting most recent modification time on overall files
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$aStylesheetFile=array();
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foreach ($aThemeParameters['imports'] as $sImport)
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{
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$sTmpThemeScssContent .= '@import "'.$sImport.'";'."\n";
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$sFile = static::FindStylesheetFile($sImport, $aImportsPaths);
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$iImportLastModified = @filemtime($sFile);
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$aStylesheetFile[] = $sFile;
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$iStyleLastModified = $iStyleLastModified < $iImportLastModified ? $iImportLastModified : $iStyleLastModified;
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}
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foreach ($aThemeParameters['stylesheets'] as $sStylesheet)
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{
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$sTmpThemeScssContent .= '@import "'.$sStylesheet.'";'."\n";
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$sFile = static::FindStylesheetFile($sStylesheet, $aImportsPaths);
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$iStylesheetLastModified = @filemtime($sFile);
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$aStylesheetFile[]=$sFile;
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$iStyleLastModified = $iStyleLastModified < $iStylesheetLastModified ? $iStylesheetLastModified : $iStyleLastModified;
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}
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$aIncludedImages=self::GetIncludedImages($aThemeParameters['variables'], $aStylesheetFile, $sThemeFolderPath);
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foreach ($aIncludedImages as $sImage)
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{
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if (!is_file($sImage))
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{
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//TODO log warning
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echo "Cannot find $sImage\n";
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}
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else
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{
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$iStylesheetLastModified = @filemtime($sImage);
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$iStyleLastModified = $iStyleLastModified < $iStylesheetLastModified ? $iStylesheetLastModified : $iStyleLastModified;
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}
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}
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// Checking if our compiled css is outdated
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$iFilemetime = @filemtime($sThemeCssPath);
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$bFileExists = file_exists($sThemeCssPath);
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$bVarSignatureChanged=false;
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if ($bFileExists && $bSetup)
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{
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$sPrecompiledSignature = static::GetSignature($sThemeCssPath);
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//check variable signature has changed which is independant from any file modification
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if (!empty($sPrecompiledSignature)){
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$sPreviousVariableSignature = static::GetVarSignature($sPrecompiledSignature);
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$sCurrentVariableSignature = md5(json_encode($aThemeParameters['variables']));
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$bVarSignatureChanged= ($sPreviousVariableSignature!==$sCurrentVariableSignature);
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}
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}
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if (!$bFileExists || $bVarSignatureChanged || (is_writable($sThemeFolderPath) && ($iFilemetime < $iStyleLastModified)))
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{
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// Dates don't match. Second chance: check if the already compiled stylesheet exists and is consistent based on its signature
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$sActualSignature = static::ComputeSignature($aThemeParameters, $aImportsPaths, $aIncludedImages);
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if ($bFileExists && !$bSetup)
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{
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$sPrecompiledSignature = static::GetSignature($sThemeCssPath);
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}
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if (!empty($sPrecompiledSignature) && $sActualSignature == $sPrecompiledSignature)
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{
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touch($sThemeCssPath); // Stylesheet is up to date, mark it as more recent to speedup next time
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}
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else
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{
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// Alas, we really need to recompile
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// Add the signature to the generated CSS file so that the file can be used as a precompiled stylesheet if needed
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$sSignatureComment =
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<<<CSS
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/*
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=== SIGNATURE BEGIN ===
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$sActualSignature
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=== SIGNATURE END ===
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*/
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CSS;
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if (!self::$oCompileCSSService)
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{
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self::$oCompileCSSService = new CompileCSSService();
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}
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$sTmpThemeCssContent = self::$oCompileCSSService->CompileCSSFromSASS($sTmpThemeScssContent, $aImportsPaths,
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$aThemeParameters['variables']);
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file_put_contents($sThemeCssPath, $sSignatureComment.$sTmpThemeCssContent);
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}
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}
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}
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/**
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* Compute the signature of a theme defined by its theme parameters. The signature is a JSON structure of
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* 1) one MD5 of all the variables/values (JSON encoded)
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* 2) the MD5 of each stylesheet file
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* 3) the MD5 of each import file
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*
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* @param string[] $aThemeParameters
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* @param string[] $aImportsPaths
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* @param $aIncludedImages
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*
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* @return string
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* @throws \Exception
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*/
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public static function ComputeSignature($aThemeParameters, $aImportsPaths, $aIncludedImages)
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{
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$aSignature = array(
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'variables' => md5(json_encode($aThemeParameters['variables'])),
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'stylesheets' => array(),
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'imports' => array(),
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'images' => array(),
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);
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foreach ($aThemeParameters['imports'] as $key => $sImport)
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{
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$sFile = static::FindStylesheetFile($sImport, $aImportsPaths);
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$aSignature['stylesheets'][$key] = md5_file($sFile);
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}
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foreach ($aThemeParameters['stylesheets'] as $key => $sStylesheet)
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{
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$sFile = static::FindStylesheetFile($sStylesheet, $aImportsPaths);
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$aSignature['stylesheets'][$key] = md5_file($sFile);
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}
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foreach ($aIncludedImages as $sImage)
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{
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if (is_file($sImage))
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{
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$aSignature['images'][$sImage] = md5_file($sImage);
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}
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}
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return json_encode($aSignature);
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}
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const IMAGE_EXTENSIONS = array('png', 'gif', 'jpg', 'jpeg');
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/**
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* Search for images referenced in stylesheet files
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* @param array $aThemeParametersVariables
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* @param array $aStylesheetFile
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* @param string $sThemeFolderPath : used as relative paths to find css images
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*
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* @return array
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* @since 2.8.0
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*/
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public static function GetIncludedImages($aThemeParametersVariables, $aStylesheetFile, $sThemeFolderPath)
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{
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$aCompleteUrls = array();
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$aToCompleteUrls = array();
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$aMissingVariables = array();
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$aFoundVariables = array();
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$aMap = array(
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'aCompleteUrls' => $aCompleteUrls,
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'aToCompleteUrls' => $aToCompleteUrls,
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'aMissingVariables' => $aMissingVariables,
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'aFoundVariables' => $aFoundVariables,
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);
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foreach ($aStylesheetFile as $sStylesheetFile)
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{
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$aRes = self::GetAllUrlFromScss($aThemeParametersVariables, $sStylesheetFile);
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/** @var array $aVal */
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foreach($aMap as $key => $aVal)
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{
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if (array_key_exists($key, $aMap))
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{
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$aMap[$key]=array_merge($aVal, $aRes[$key]);
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}
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}
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}
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$aMap = static::ResolveUncompleteUrlsFromScss($aMap, $aThemeParametersVariables, $aStylesheetFile);
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$aImages = array();
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foreach ($aMap ['aCompleteUrls'] as $sUrl)
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{
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$sImg = $sUrl;
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if (preg_match("/(.*)\?/", $sUrl, $aMatches))
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{
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$sImg=$aMatches[1];
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}
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if (self::HasImageExtension($sImg)
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&& ! array_key_exists($sImg, $aImages))
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{
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if (!is_file($sImg))
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{
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$sImg=$sThemeFolderPath.DIRECTORY_SEPARATOR.$sImg;
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}
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$aImages[$sImg]=$sImg;
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}
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}
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return array_values($aImages);
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}
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/**
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* Complete url using provided variables. Example with $var=1: XX + $var => XX1
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* @param $aMap
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* @param $aThemeParametersVariables
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* @param $aStylesheetFile
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*
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* @return mixed
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*/
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public static function ResolveUncompleteUrlsFromScss($aMap, $aThemeParametersVariables, $aStylesheetFile)
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{
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$sContent="";
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foreach ($aStylesheetFile as $sStylesheetFile)
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{
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if (is_file($sStylesheetFile))
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{
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$sContent .= '\n' . file_get_contents($sStylesheetFile);
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}
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}
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$aMissingVariables=$aMap['aMissingVariables'];
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$aFoundVariables=$aMap['aFoundVariables'];
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$aToCompleteUrls=$aMap['aToCompleteUrls'];
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$aCompleteUrls=$aMap['aCompleteUrls'];
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list($aMissingVariables, $aFoundVariables) = self::FindMissingVariables($aThemeParametersVariables, $aMissingVariables, $aFoundVariables, $sContent);
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list($aToCompleteUrls, $aCompleteUrls) = self::ResolveUrls($aFoundVariables, $aToCompleteUrls, $aCompleteUrls);
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$aMap['aMissingVariables']=$aMissingVariables;
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$aMap['aFoundVariables']=$aFoundVariables;
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$aMap['aToCompleteUrls']=$aToCompleteUrls;
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$aMap['aCompleteUrls']=$aCompleteUrls;
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return $aMap;
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}
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/**
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* Find missing variable values from SCSS content based on their name.
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* @param $aThemeParametersVariables
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* @param $aMissingVariables
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* @param $aFoundVariables
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* @param $sContent: scss content
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*
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* @return array
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*/
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public static function FindMissingVariables($aThemeParametersVariables, $aMissingVariables, $aFoundVariables, $sContent)
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{
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if (!empty($aMissingVariables))
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{
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foreach ($aMissingVariables as $var)
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{
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if (array_key_exists($var, $aThemeParametersVariables))
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{
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$aFoundVariables[$var] = $aThemeParametersVariables[$var];
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unset($aMissingVariables[$var]);
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}
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else
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{
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if (preg_match_all("/\\\$$var\s*:\s*[\"'](.*)[\"']/", $sContent, $aValues))
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{
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$aFoundVariables[$var] = $aValues[1][0];
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unset($aMissingVariables[$var]);
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}
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}
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}
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}
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return array($aMissingVariables, $aFoundVariables);
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}
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/**
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* @param $aFoundVariables
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* @param array $aToCompleteUrls
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* @param array $aCompleteUrls
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*
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* @return array
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*/
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public static function ResolveUrls($aFoundVariables, array $aToCompleteUrls, array $aCompleteUrls)
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{
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if (!empty($aFoundVariables))
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{
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foreach ($aToCompleteUrls as $sUrlTemplate)
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{
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unset($aToCompleteUrls[$sUrlTemplate]);
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$sResolvedUrl = ThemeHandler::ResolveUrl($sUrlTemplate, $aFoundVariables);
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if ($sResolvedUrl == false)
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{
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$aToCompleteUrls[$sUrlTemplate] = $sUrlTemplate;
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}
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else
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{
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$aCompleteUrls[$sUrlTemplate] = $sResolvedUrl;
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}
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}
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}
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return array($aToCompleteUrls, $aCompleteUrls);
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}
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/**
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* Find all referenced URLs from a SCSS file.
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* @param $aThemeParametersVariables
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* @param $sStylesheetFile
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*
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* @return array
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*/
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public static function GetAllUrlFromScss($aThemeParametersVariables, $sStylesheetFile)
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{
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$aCompleteUrls = array();
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$aToCompleteUrls = array();
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$aMissingVariables = array();
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$aFoundVariables = array();
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if (is_file($sStylesheetFile))
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{
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$sContent = file_get_contents($sStylesheetFile);
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if (preg_match_all("/url\s*\((.*)\)/", $sContent, $aMatches))
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{
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foreach ($aMatches[1] as $path)
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{
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if (!array_key_exists($path, $aCompleteUrls)
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&& !array_key_exists($path, $aToCompleteUrls))
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{
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if (preg_match_all("/\\$([\w-_]+)/", $path, $aCurrentVars))
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{
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foreach ($aCurrentVars[1] as $var)
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{
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if (!array_key_exists($var, $aMissingVariables))
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{
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$aMissingVariables[$var] = $var;
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}
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}
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$aToCompleteUrls[$path] = $path;
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}
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else
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{
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$aCompleteUrls[$path] = trim($path, "\"'");
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}
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}
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}
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}
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if (!empty($aMissingVariables))
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{
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list($aMissingVariables, $aFoundVariables) = self::FindMissingVariables($aThemeParametersVariables, $aMissingVariables, $aFoundVariables, $sContent);
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list($aToCompleteUrls, $aCompleteUrls) = self::ResolveUrls($aFoundVariables, $aToCompleteUrls, $aCompleteUrls);
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|
}
|
|
}
|
|
|
|
return array(
|
|
'aCompleteUrls' => $aCompleteUrls,
|
|
'aToCompleteUrls' => $aToCompleteUrls,
|
|
'aMissingVariables' => $aMissingVariables,
|
|
'aFoundVariables' => $aFoundVariables,
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Calculate url based on its template + variables.
|
|
* @param $sUrlTemplate
|
|
* @param $aFoundVariables
|
|
*
|
|
* @return bool|string
|
|
*/
|
|
public static function ResolveUrl($sUrlTemplate, $aFoundVariables)
|
|
{
|
|
$aPattern=array();
|
|
$aReplacement=array();
|
|
foreach ($aFoundVariables as $aFoundVariable => $aFoundVariableValue)
|
|
{
|
|
//XX + $key + YY
|
|
$aPattern[]="/['\"]\s*\+\s*\\\$" . $aFoundVariable . "[\s\+]+\s*['\"]/";
|
|
//$key + YY
|
|
$aPattern[]="/\\\$" . $aFoundVariable. "[\s\+]+\s*['\"]/";
|
|
//XX + $key
|
|
$aPattern[]="/['\"]\s*[\+\s]+\\\$" . $aFoundVariable . "$/";
|
|
$aReplacement[]=$aFoundVariableValue;
|
|
$aReplacement[]=$aFoundVariableValue;
|
|
$aReplacement[]=$aFoundVariableValue;
|
|
}
|
|
$sResolvedUrl=preg_replace($aPattern, $aReplacement, $sUrlTemplate);
|
|
if (strpos($sResolvedUrl, "+")!=false)
|
|
{
|
|
return false;
|
|
}
|
|
return trim($sResolvedUrl, "\"'");
|
|
}
|
|
|
|
/**
|
|
* indicate whether a string ends with image suffix.
|
|
* @param $path
|
|
*
|
|
* @return bool
|
|
*/
|
|
private static function HasImageExtension($path)
|
|
{
|
|
foreach (self::IMAGE_EXTENSIONS as $sExt)
|
|
{
|
|
if (endsWith($path, $sExt))
|
|
{
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
|
|
/**
|
|
* Extract the signature for a generated CSS file. The signature MUST be alone one line immediately
|
|
* followed (on the next line) by the === SIGNATURE END === pattern
|
|
*
|
|
* Note the signature can be place anywhere in the CSS file (obviously inside a CSS comment !) but the
|
|
* function will be faster if the signature is at the beginning of the file (since the file is scanned from the start)
|
|
*
|
|
* @param $sFilepath
|
|
*
|
|
* @return string
|
|
*/
|
|
public static function GetSignature($sFilepath)
|
|
{
|
|
$sPreviousLine = '';
|
|
$hFile = @fopen($sFilepath, "r");
|
|
if ($hFile !== false)
|
|
{
|
|
$sLine = '';
|
|
do
|
|
{
|
|
$sPreviousLine = $sLine;
|
|
$sLine = rtrim(fgets($hFile)); // Remove the trailing \n
|
|
}
|
|
while (($sLine !== false) && ($sLine != '=== SIGNATURE END ==='));
|
|
fclose($hFile);
|
|
}
|
|
return $sPreviousLine;
|
|
}
|
|
|
|
public static function GetVarSignature($JsonSignature)
|
|
{
|
|
$aJsonArray = json_decode($JsonSignature, true);
|
|
if (array_key_exists('variables', $aJsonArray))
|
|
{
|
|
return $aJsonArray['variables'];
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Find the given file in the list of ImportsPaths directory
|
|
* @param string $sFile
|
|
* @param string[] $aImportsPaths
|
|
* @throws Exception
|
|
* @return string
|
|
*/
|
|
private static function FindStylesheetFile($sFile, $aImportsPaths)
|
|
{
|
|
foreach($aImportsPaths as $sPath)
|
|
{
|
|
$sImportedFile = realpath($sPath.'/'.$sFile);
|
|
if (file_exists($sImportedFile))
|
|
{
|
|
return $sImportedFile;
|
|
}
|
|
}
|
|
return ''; // Not found, fail silently, maybe the SCSS compiler knowns better...
|
|
}
|
|
|
|
public static function mockCompileCSSService($oCompileCSSServiceMock)
|
|
{
|
|
self::$oCompileCSSService = $oCompileCSSServiceMock;
|
|
}
|
|
}
|
|
|
|
class CompileCSSService
|
|
{
|
|
/**
|
|
* CompileCSSService constructor.
|
|
*/
|
|
public function __construct()
|
|
{
|
|
}
|
|
|
|
public function CompileCSSFromSASS($sSassContent, $aImportPaths = array(), $aVariables = array()){
|
|
return utils::CompileCSSFromSASS($sSassContent, $aImportPaths, $aVariables);
|
|
}
|
|
|
|
}
|