<?php

abstract class DiffusionController extends PhabricatorController {

  protected $diffusionRequest;

  public function willProcessRequest(array $data) {
    if (isset($data['callsign'])) {
      $drequest = DiffusionRequest::newFromAphrontRequestDictionary(
        $data,
        $this->getRequest());
      $this->diffusionRequest = $drequest;
    }
  }

  public function setDiffusionRequest(DiffusionRequest $request) {
    $this->diffusionRequest = $request;
    return $this;
  }

  protected function getDiffusionRequest() {
    if (!$this->diffusionRequest) {
      throw new Exception("No Diffusion request object!");
    }
    return $this->diffusionRequest;
  }

  final protected function buildSideNav($selected, $has_change_view) {
    $nav = new AphrontSideNavFilterView();
    $nav->setBaseURI(new PhutilURI(''));

    $navs = array(
      'history' => pht('History View'),
      'browse'  => pht('Browse View'),
      'change'  => pht('Change View'),
    );

    if (!$has_change_view) {
      unset($navs['change']);
    }

    $drequest = $this->getDiffusionRequest();
    $branch = $drequest->loadBranch();

    if ($branch && $branch->getLintCommit()) {
      $navs['lint'] = pht('Lint View');
    }

    $selected_href = null;
    foreach ($navs as $action => $name) {
      $href = $drequest->generateURI(
        array(
          'action' => $action,
        ));
      if ($action == $selected) {
        $selected_href = $href;
      }

      $nav->addFilter($href, $name, $href);
    }
    $nav->selectFilter($selected_href, null);

    // TODO: URI encoding might need to be sorted out for this link.

    $nav->addFilter(
      '',
      pht("Search Owners \xE2\x86\x97"),
      '/owners/view/search/'.
        '?repository='.phutil_escape_uri($drequest->getCallsign()).
        '&path='.phutil_escape_uri('/'.$drequest->getPath()));

    return $nav;
  }

  public function buildCrumbs(array $spec = array()) {
    $crumbs = $this->buildApplicationCrumbs();
    $crumb_list = $this->buildCrumbList($spec);
    foreach ($crumb_list as $crumb) {
      $crumbs->addCrumb($crumb);
    }
    return $crumbs;
  }

  private function buildCrumbList(array $spec = array()) {

    $spec = $spec + array(
      'commit'  => null,
      'tags'    => null,
      'branches'    => null,
      'view'    => null,
    );

    $crumb_list = array();

    // On the home page, we don't have a DiffusionRequest.
    if ($this->diffusionRequest) {
      $drequest = $this->getDiffusionRequest();
      $repository = $drequest->getRepository();
    } else {
      $drequest = null;
      $repository = null;
    }

    if (!$repository) {
      return $crumb_list;
    }

    $callsign = $repository->getCallsign();
    $repository_name = 'r'.$callsign;

    if (!$spec['commit'] && !$spec['tags'] && !$spec['branches']) {
      $branch_name = $drequest->getBranch();
      if ($branch_name) {
        $repository_name .= ' ('.$branch_name.')';
      }
    }

    $crumb = id(new PhabricatorCrumbView())
      ->setName($repository_name);
    if (!$spec['view'] && !$spec['commit'] &&
        !$spec['tags'] && !$spec['branches']) {
      $crumb_list[] = $crumb;
      return $crumb_list;
    }
    $crumb->setHref(
      $drequest->generateURI(
        array(
          'action' => 'branch',
          'path' => '/',
        )));
    $crumb_list[] = $crumb;

    $raw_commit = $drequest->getRawCommit();

    if ($spec['tags']) {
      $crumb = new PhabricatorCrumbView();
      if ($spec['commit']) {
        $crumb->setName(
          pht("Tags for %s", 'r'.$callsign.$raw_commit));
        $crumb->setHref($drequest->generateURI(
          array(
            'action' => 'commit',
            'commit' => $raw_commit,
          )));
      } else {
        $crumb->setName(pht('Tags'));
      }
      $crumb_list[] = $crumb;
      return $crumb_list;
    }

    if ($spec['branches']) {
      $crumb = id(new PhabricatorCrumbView())
        ->setName(pht('Branches'));
      $crumb_list[] = $crumb;
      return $crumb_list;
    }

    if ($spec['commit']) {
      $crumb = id(new PhabricatorCrumbView())
        ->setName("r{$callsign}{$raw_commit}")
        ->setHref("r{$callsign}{$raw_commit}");
      $crumb_list[] = $crumb;
      return $crumb_list;
    }

    $crumb = new PhabricatorCrumbView();
    $view = $spec['view'];

    $path = null;
    if (isset($spec['path'])) {
      $path = $drequest->getPath();
    }

    if ($raw_commit) {
      $commit_link = DiffusionView::linkCommit(
        $repository,
        $raw_commit);
    } else {
      $commit_link = '';
    }

    switch ($view) {
      case 'history':
        $view_name = pht('History');
        break;
      case 'browse':
        $view_name = pht('Browse');
        break;
      case 'lint':
        $view_name = pht('Lint');
        break;
      case 'change':
        $view_name = pht('Change');
        break;
    }

    $uri_params = array(
      'action' => $view,
    );

    $crumb = id(new PhabricatorCrumbView())
      ->setName($view_name);

    if ($view == 'browse' || $view == 'change' || $view == 'history') {
      $crumb_list[] = $crumb;
      return $crumb_list;
    }

    $crumb->setHref($drequest->generateURI(
      array(
        'path' => '',
      ) + $uri_params));
    $crumb_list[] = $crumb;

    $path_parts = explode('/', $path);
    do {
      $last = array_pop($path_parts);
    } while (count($path_parts) && $last == '');

    $path_sections = array();
    $thus_far = '';
    foreach ($path_parts as $path_part) {
      $thus_far .= $path_part.'/';
      $path_sections[] = '/';
      $path_sections[] = phutil_tag(
        'a',
        array(
          'href' => $drequest->generateURI(
            array(
              'path' => $thus_far,
            ) + $uri_params),
        ),
        $path_part);
    }

    $path_sections[] = '/'.$last;

    $crumb_list[] = id(new PhabricatorCrumbView())
      ->setName($path_sections);

    $last_crumb = array_pop($crumb_list);

    if ($raw_commit) {
      $jump_link = phutil_tag(
        'a',
        array(
          'href' => $drequest->generateURI(
            array(
              'commit' => '',
            ) + $uri_params),
        ),
        pht('Jump to HEAD'));

      $name = $last_crumb->getName();
      $name = hsprintf('%s @ %s (%s)', $name, $commit_link, $jump_link);
      $last_crumb->setName($name);
    } else if ($spec['view'] != 'lint') {
      $name = $last_crumb->getName();
      $name = hsprintf('%s @ HEAD', $name);
      $last_crumb->setName($name);
    }

    $crumb_list[] = $last_crumb;

    return $crumb_list;
  }

  protected function callConduitWithDiffusionRequest(
    $method,
    array $params = array()) {

    $user = $this->getRequest()->getUser();
    $drequest = $this->getDiffusionRequest();

    return DiffusionQuery::callConduitWithDiffusionRequest(
      $user,
      $drequest,
      $method,
      $params);
  }

  protected function getRepositoryControllerURI(
    PhabricatorRepository $repository,
    $path) {
    return $this->getApplicationURI($repository->getCallsign().'/'.$path);
  }

  protected function renderPathLinks(DiffusionRequest $drequest, $action) {
    $path = $drequest->getPath();
    $path_parts = array_filter(explode('/', trim($path, '/')));

    $links = array();
    if ($path_parts) {
      $links[] = phutil_tag(
        'a',
        array(
          'href' => $drequest->generateURI(
            array(
              'action' => $action,
              'path' => '',
            )),
        ),
        'r'.$drequest->getRepository()->getCallsign().'/');
      $accum = '';
      $last_key = last_key($path_parts);
      foreach ($path_parts as $key => $part) {
        $links[] = ' ';
        $accum .= '/'.$part;
        if ($key === $last_key) {
          $links[] = $part;
        } else {
          $links[] = phutil_tag(
            'a',
            array(
              'href' => $drequest->generateURI(
                array(
                  'action' => $action,
                  'path' => $accum,
                )),
            ),
            $part.'/');
        }
      }
    } else {
      $links[] = 'r'.$drequest->getRepository()->getCallsign().'/';
    }

    return $links;
  }

}