Gitea Integration
-----------------
Hydra can notify Git servers (such as [GitLab](https://gitlab.com/), [GitHub](https://github.com)
or [Gitea](https://gitea.io/en-us/)) about the result of a build from a Git checkout.
This section describes how it can be implemented for `gitea`, but the approach for `gitlab` is
analogous:
* [Obtain an API token for your user](https://docs.gitea.io/en-us/api-usage/#authentication)
* Add it to your `hydra.conf` like this:
  ``` nix
  {
    services.hydra-dev.extraConfig = ''
      <gitea_authorization>
      your_username=your_token
      </gitea_authorization>
    '';
  }
  ```

* For a jobset with a `Git`-input which points to a `gitea`-instance, add the following
  additional inputs:
  | Type           | Name                | Value                               |
  | -------------- | ------------------- | ----------------------------------- |
  | `String value` | `gitea_repo_name`   | *Name of the repository to build*   |
  | `String value` | `gitea_repo_owner`  | *Owner of the repository*           |
  | `String value` | `gitea_status_repo` | *Name of the `Git checkout` input*  |

package Hydra::Plugin::GiteaStatus;
use strict;
use parent 'Hydra::Plugin';
use HTTP::Request;
use JSON;
use LWP::UserAgent;
use Hydra::Helper::CatalystUtils;
use List::Util qw(max);
sub isEnabled {
    my ($self) = @_;
    return defined $self->{config}->{gitea_authorization};
}
sub toGiteaState {
    # See https://try.gitea.io/api/swagger#/repository/repoCreateStatus
    my ($status, $buildStatus) = @_;
    if ($status == 0 || $status == 1) {
        return "pending";
    } elsif ($buildStatus == 0) {
        return "success";
    } else {
        return "error";
    }
}
sub common {
    my ($self, $build, $dependents, $status) = @_;
    my $baseurl = $self->{config}->{'base_uri'} || "http://localhost:3000";
    # Find matching configs
    foreach my $b ($build, @{$dependents}) {
        my $jobName = showJobName $b;
        my $evals = $build->jobsetevals;
        my $ua = LWP::UserAgent->new();
        # Don't send out "pending/running" status updates if the build is already finished
        next if $status < 2 && $b->finished == 1;
        my $state = toGiteaState($status, $b->buildstatus);
        my $body = encode_json(
            {
                state => $state,
                target_url => "$baseurl/build/" . $b->id,
                description => "Hydra build #" . $b->id . " of $jobName",
                context => "Hydra " . $b->get_column('job'),
            });
        while (my $eval = $evals->next) {
            my $giteastatusInput = $eval->jobsetevalinputs->find({ name => "gitea_status_repo" });
            next unless defined $giteastatusInput && defined $giteastatusInput->value;
            my $i = $eval->jobsetevalinputs->find({ name => $giteastatusInput->value, altnr => 0 });
            next unless defined $i;
            my $repoOwner = $eval->jobsetevalinputs->find({ name => "gitea_repo_owner" })->value;
            my $repoName = $eval->jobsetevalinputs->find({ name => "gitea_repo_name" })->value;
            my $accessToken = $self->{config}->{gitea_authorization}->{$repoOwner};
            my $rev = $i->revision;
            my $domain = URI->new($i->uri)->host;
            my $url = "http://$domain:3000/api/v1/repos/$repoOwner/$repoName/statuses/$rev";
            print STDERR "GiteaStatus POSTing $state to $url\n";
            my $req = HTTP::Request->new('POST', $url);
            $req->header('Content-Type' => 'application/json');
            $req->header('Authorization' => "token $accessToken");
            $req->content($body);
            my $res = $ua->request($req);
            print STDERR $res->status_line, ": ", $res->decoded_content, "\n" unless $res->is_success;
        }
    }
}
sub buildQueued {
    common(@_, [], 0);
}
sub buildStarted {
    common(@_, [], 1);
}
sub buildFinished {
    common(@_, 2);
}
1;