public function merge()

in src/PartiallyGeneratedCode.hack [54:93]

• 35 lines of code
• 9 McCabe index (conditional complexity)

  public function merge(
    string $existing_code,
    ?KeyedContainer<string, Traversable<string>> $rekeys = null,
  ): string {
    $merged = varray[];
    $existing = $this->extractManualCode($existing_code);
    $generated = $this->iterateCodeSections($this->code);
    foreach ($generated as $section) {
      list($id, $chunk) = $section;
      if ($id === null) {
        // Autogenerated section, add it as it is
        $merged[] = $chunk;
      } else {
        if (C\contains_key($existing, $id)) {
          // This manual section was present in the existing code, so insert it
          $merged[] = $existing[$id];
        } else {
          $content = vec[];
          if ($rekeys !== null) {
            if (C\contains_key($rekeys, $id)) {
              foreach ($rekeys[$id] as $old_id) {
                if (C\contains_key($existing, $old_id)) {
                  $content[] = $existing[$old_id];
                }
              }
            }
          }
          if ($content) {
            $merged[] = Str\join($content, "\n\n");
          } else {
            // This manual section is new, so insert inside it the chunk from
            // the generated code (e.g. the generated code can have a comment
            // saying what that manual section should be used for)
            $merged[] = $chunk;
          }
        }
      }
    }
    return Str\join(\array_filter($merged), "\n");
  }