1 files changed, 175 insertions, 0 deletions
diff --git a/vendor/ipl/html/src/TemplateString.php b/vendor/ipl/html/src/TemplateString.php
new file mode 100644
index 0000000..611ea12
--- /dev/null
+++ b/vendor/ipl/html/src/TemplateString.php
@@ -0,0 +1,175 @@
+<?php
+
+namespace ipl\Html;
+
+use Exception;
+
+/**
+ * Render {{#mustache}}Mustache{{/mustache}}-like string from {@link ValidHtml} element arguments
+ *
+ * # Example Usage
+ * ```
+ * $info = TemplateString::create(
+ *      'Follow the {{#doc}}HTML documentation{{/doc}} for more information on {{#strong}}HTML elements{{/strong}}',
+ *      [
+ *          'doc'    => new Link(null, 'doc/html'),
+ *          'strong' => Html::tag('strong')
+ *      ]
+ * );
+ * ```
+ */
+class TemplateString extends FormattedString
+{
+    /** @var array */
+    protected $templateArgs = [];
+
+    /** @var int  */
+    protected $pos = 0;
+
+    /** @var string  */
+    protected $string;
+
+    /** @var int */
+    protected $length;
+
+    public function __construct($format, $args = null)
+    {
+        $parentArgs = [];
+        foreach ($args ?: [] as $val) {
+            if (is_array($val) && is_string(key($val))) {
+                $this->templateArgs += $val;
+            } else {
+                $parentArgs[] = $val;
+            }
+        }
+
+        parent::__construct($format, $parentArgs);
+    }
+
+    /**
+     * Parse template strings
+     *
+     * @param null $for template name
+     * @return HtmlDocument
+     * @throws Exception in case of missing template argument or unbounded open or close templates
+     */
+    protected function parseTemplates($for = null)
+    {
+        $buffer = '';
+
+        while (($char = $this->readChar()) !== false) {
+            if ($char !== '{') {
+                $buffer .= $char;
+                continue;
+            }
+
+            $nextChar = $this->readChar();
+            if ($nextChar !== '{') {
+                $buffer .= $char . $nextChar;
+                continue;
+            }
+
+            $templateHandle = $this->readChar();
+            $start = $templateHandle === '#';
+            $end = $templateHandle === '/';
+
+            $templateKey = $this->readUntil('}');
+            // if the string following '{{#' is read up to the last character or (length - 1)th character
+            // then it is not a template
+            if ($this->pos >= $this->length - 1) {
+                $buffer .= $char . $nextChar . $templateHandle . $templateKey;
+                continue;
+            }
+
+            $this->pos++;
+            $closeChar = $this->readChar();
+
+            if ($closeChar !== '}') {
+                $buffer .= $char . $nextChar . $templateHandle . $templateKey . '}' . $closeChar;
+                continue;
+            }
+
+            if ($start) {
+                if (isset($this->templateArgs[$templateKey])) {
+                    $wrapper = $this->templateArgs[$templateKey];
+
+                    $buffer .= $this->parseTemplates($templateKey)->prependWrapper($wrapper);
+                } else {
+                    throw new Exception(sprintf(
+                        'Missing template argument: %s ',
+                        $templateKey
+                    ));
+                }
+            } elseif ($for === $templateKey && $end) {
+                // close the template
+                $for = null;
+                break;
+            } else {
+                // throw exception for unbounded closing of templates
+                throw new Exception(sprintf(
+                    'Unbound closing of template: %s',
+                    $templateKey
+                ));
+            }
+        }
+
+        if ($this->pos === $this->length && $for !== null) {
+            throw new Exception(sprintf(
+                'Unbound opening of template: %s',
+                $for
+            ));
+        }
+
+        return (new HtmlDocument())->addHtml(HtmlString::create($buffer));
+    }
+
+    /**
+     * Read until any of the given chars appears
+     *
+     * @param string ...$chars
+     *
+     * @return string
+     */
+    protected function readUntil(...$chars)
+    {
+        $buffer = '';
+        while (($c = $this->readChar()) !== false) {
+            if (in_array($c, $chars, true)) {
+                $this->pos--;
+                break;
+            }
+
+            $buffer .= $c;
+        }
+
+        return $buffer;
+    }
+
+    /**
+     * Read a single character
+     *
+     * @return false|string false if there is no character left
+     */
+    protected function readChar()
+    {
+        if ($this->length > $this->pos) {
+            return $this->string[$this->pos++];
+        }
+
+        return false;
+    }
+
+    public function render()
+    {
+        $formattedstring = parent::render();
+        if (empty($this->templateArgs)) {
+            return $formattedstring;
+        }
+
+        $this->string = $formattedstring;
+
+        $this->length = strlen($formattedstring);
+
+        return $this->parseTemplates()->render();
+    }
+}