WIP|FEATURE: First working check for deprecated functions

* Provide a generic sniff with configuration (property) containing all
  deprecated calls.
* Check function calls and provide warning with information.

Relates: #33

src/Standards/Typo3Update/Sniffs/Deprecated/AbstractFunctionCall.php

@@ -0,0 +1,95 @@
+<?php
+namespace Typo3Update\Sniffs\Deprecated;
+
+/*
+ * Copyright (C) 2017  Daniel Siepmann <coding@daniel-siepmann.de>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+use PHP_CodeSniffer_File as PhpCsFile;
+use PHP_CodeSniffer_Sniff as PhpCsSniff;
+use PHP_CodeSniffer_Tokens as Tokens;
+
+/**
+ *
+ */
+abstract class AbstractFunctionCall implements PhpCsSniff
+{
+    use \Typo3Update\Sniffs\ExtendedPhpCsSupportTrait;
+
+    abstract protected function getFunctionNames();
+    abstract protected function getOldFunctionCall($functionName);
+    abstract protected function getNewFunctionCall($functionName);
+    abstract protected function getDocsUrl($functionName);
+
+    /**
+     * Returns the token types that this sniff is interested in.
+     *
+     * @return array<int>
+     */
+    public function register()
+    {
+        return Tokens::$functionNameTokens;
+    }
+
+    /**
+     * Processes the tokens that this sniff is interested in.
+     *
+     * This is the default implementation, as most of the time next T_STRING is
+     * the class name. This way only the register method has to be registered
+     * in default cases.
+     *
+     * @param PhpCsFile $phpcsFile The file where the token was found.
+     * @param int                  $stackPtr  The position in the stack where
+     *                                        the token was found.
+     *
+     * @return void
+     */
+    public function process(PhpCsFile $phpcsFile, $stackPtr)
+    {
+        if (!$this->isFunctionCall($phpcsFile, $stackPtr)) {
+            return;
+        }
+
+        $tokens = $phpcsFile->getTokens();
+        $token = $tokens[$stackPtr];
+
+        if (in_array($token['content'], $this->getFunctionNames()) === false) {
+            return;
+        }
+
+        $this->addWarning($phpcsFile, $stackPtr);
+    }
+
+    protected function addWarning(PhpCsFile $phpcsFile, $tokenPosition)
+    {
+        $tokens = $phpcsFile->getTokens();
+        $token = $tokens[$tokenPosition];
+        $functionCall = $token['content'];
+
+        $phpcsFile->addWarning(
+            'Legacy function calls are not allowed; found %s. %s. See: %s',
+            $tokenPosition,
+            'legacyFunctioncall',
+            [
+                $this->getOldFunctionCall($functionCall),
+                $this->getNewFunctionCall($functionCall),
+                $this->getDocsUrl($functionCall),
+            ]
+        );
+    }
+}

src/Standards/Typo3Update/Sniffs/Deprecated/GenericFunctionCallSniff.php

@@ -0,0 +1,60 @@
+<?php
+
+/*
+ * Copyright (C) 2017  Daniel Siepmann <coding@daniel-siepmann.de>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+use PHP_CodeSniffer_File as PhpCsFile;
+use Typo3Update\Sniffs\Deprecated\AbstractFunctionCall;
+
+/**
+ */
+class Typo3Update_Sniffs_Deprecated_GenericFunctionCallSniff extends AbstractFunctionCall
+{
+    protected $deprecatedFunctions = [
+        'loadTCA' => [
+            'oldFunctionCall' => '\TYPO3\CMS\Core\Utility\GeneralUtility::loadTCA()',
+            'newFunctionCall' => null,
+            'docsUrl' => 'https://docs.typo3.org/typo3cms/extensions/core/Changelog/7.0/Breaking-61785-LoadTcaFunctionRemoved.html',
+        ],
+    ];
+
+    protected function getFunctionNames()
+    {
+        return array_keys($this->deprecatedFunctions);
+    }
+
+    protected function getOldFunctionCall($functionName)
+    {
+        return $this->deprecatedFunctions[$functionName]['oldFunctionCall'];
+    }
+
+    protected function getNewFunctionCall($functionName)
+    {
+        $newCall = $this->deprecatedFunctions[$functionName]['newFunctionCall'];
+        if ($newCall !== null) {
+            return $newCall;
+        }
+        return 'There is no replacement, just remove call';
+    }
+
+    protected function getDocsUrl($functionName)
+    {
+        return $this->deprecatedFunctions[$functionName]['docsUrl'];
+    }
+}