Init import

lib/template.php

@@ -0,0 +1,61 @@
+<?php
+
+/**
+ * include_path
+ * 
+ * uses a partial url, eg '/foo' to locate a corresponding
+ * php file, eg 'foo.php', and execute it.
+ *
+ * url_fragment - a key to locating php files, no extetension
+                  letters and hyphens are ok
+ */
+function include_path($url_fragment) {
+  if (preg_match('#^/([a-z-]+.php)$#', $url_fragment, $matches)) {
+    $path = __DIR__ . '/../' . $matches[1];
+  } else {
+    $path = null;
+  }
+
+  if (file_exists($path)) {
+    ob_start();
+    include $path;
+    $result = ob_get_clean();
+
+    return $result;
+  } else {
+    # Hard bail
+    http_response_code(404);
+    echo "404: $path not found\n";
+    exit;
+  }
+}
+
+/**
+ * snippet_include
+ *
+ * loads non_php file for parsing.
+ * Uses {varname} to replace strings
+ * 
+ * filename
+ * context - a keyed array for matching
+ *           eg [ 'title'=>'Home Page', ... ]
+ */
+function snippet_include($filename, $context=[]) {
+  $snippet = file_get_contents($filename);
+
+  // Handle comments {* ... *}
+  $snippet = preg_replace('/ *{\*(.*?)\*}\n*/s','',$snippet);
+
+  // Use regex to find {placeholders} in the template
+  // Note this uses a callback function to do the matches
+  $snippet = preg_replace_callback('/\{\s*(\w+)\s*\}/', function($matches) use ($context) {
+    $key = $matches[1];
+
+    $value = isset($context[$key]) ? $context[$key] : $key;
+
+    return $value;
+  }, $snippet);
+
+  return $snippet;
+}
+