Replace existing autoloader with Composer-supplied

- Move Friendica namespace to `src`
- Move required `ezyang/htmlpurifier` to vendor
- Remove existing static autoloader
- Change boot.php reference to the autoloader

vendor/ezyang/htmlpurifier/library/HTMLPurifier/StringHashParser.php

@@ -0,0 +1,136 @@
+<?php
+
+/**
+ * Parses string hash files. File format is as such:
+ *
+ *      DefaultKeyValue
+ *      KEY: Value
+ *      KEY2: Value2
+ *      --MULTILINE-KEY--
+ *      Multiline
+ *      value.
+ *
+ * Which would output something similar to:
+ *
+ *      array(
+ *          'ID' => 'DefaultKeyValue',
+ *          'KEY' => 'Value',
+ *          'KEY2' => 'Value2',
+ *          'MULTILINE-KEY' => "Multiline\nvalue.\n",
+ *      )
+ *
+ * We use this as an easy to use file-format for configuration schema
+ * files, but the class itself is usage agnostic.
+ *
+ * You can use ---- to forcibly terminate parsing of a single string-hash;
+ * this marker is used in multi string-hashes to delimit boundaries.
+ */
+class HTMLPurifier_StringHashParser
+{
+
+    /**
+     * @type string
+     */
+    public $default = 'ID';
+
+    /**
+     * Parses a file that contains a single string-hash.
+     * @param string $file
+     * @return array
+     */
+    public function parseFile($file)
+    {
+        if (!file_exists($file)) {
+            return false;
+        }
+        $fh = fopen($file, 'r');
+        if (!$fh) {
+            return false;
+        }
+        $ret = $this->parseHandle($fh);
+        fclose($fh);
+        return $ret;
+    }
+
+    /**
+     * Parses a file that contains multiple string-hashes delimited by '----'
+     * @param string $file
+     * @return array
+     */
+    public function parseMultiFile($file)
+    {
+        if (!file_exists($file)) {
+            return false;
+        }
+        $ret = array();
+        $fh = fopen($file, 'r');
+        if (!$fh) {
+            return false;
+        }
+        while (!feof($fh)) {
+            $ret[] = $this->parseHandle($fh);
+        }
+        fclose($fh);
+        return $ret;
+    }
+
+    /**
+     * Internal parser that acepts a file handle.
+     * @note While it's possible to simulate in-memory parsing by using
+     *       custom stream wrappers, if such a use-case arises we should
+     *       factor out the file handle into its own class.
+     * @param resource $fh File handle with pointer at start of valid string-hash
+     *            block.
+     * @return array
+     */
+    protected function parseHandle($fh)
+    {
+        $state   = false;
+        $single  = false;
+        $ret     = array();
+        do {
+            $line = fgets($fh);
+            if ($line === false) {
+                break;
+            }
+            $line = rtrim($line, "\n\r");
+            if (!$state && $line === '') {
+                continue;
+            }
+            if ($line === '----') {
+                break;
+            }
+            if (strncmp('--#', $line, 3) === 0) {
+                // Comment
+                continue;
+            } elseif (strncmp('--', $line, 2) === 0) {
+                // Multiline declaration
+                $state = trim($line, '- ');
+                if (!isset($ret[$state])) {
+                    $ret[$state] = '';
+                }
+                continue;
+            } elseif (!$state) {
+                $single = true;
+                if (strpos($line, ':') !== false) {
+                    // Single-line declaration
+                    list($state, $line) = explode(':', $line, 2);
+                    $line = trim($line);
+                } else {
+                    // Use default declaration
+                    $state  = $this->default;
+                }
+            }
+            if ($single) {
+                $ret[$state] = $line;
+                $single = false;
+                $state  = false;
+            } else {
+                $ret[$state] .= "$line\n";
+            }
+        } while (!feof($fh));
+        return $ret;
+    }
+}
+
+// vim: et sw=4 sts=4