public static async Task <object> Run(
[HttpTrigger(AuthorizationLevel.Function, WebHookType = "genericJson")] HttpRequestMessage req,
TraceWriter log)
{
log.Info("Netlify webhook triggered");
string jsonContent = await req.Content.ReadAsStringAsync();
var data = NetlifyHookBody.CreateFromRequest(jsonContent);
if (!data.ReviewId.HasValue)
{
log.Info("Build is not for a PR. Ignoring.");
return(req.CreateResponse(HttpStatusCode.NoContent));
}
var client = new GitHubClient(new ProductHeaderValue("reactjs-net-webhooks"))
{
Credentials = new Credentials(ConfigurationManager.AppSettings["GitHubToken"])
};
// Determine if the PR modified any site files
var githubOwner = ConfigurationManager.AppSettings["GitHubOwner"];
var githubRepo = ConfigurationManager.AppSettings["GitHubRepo"];
var pullRequestFiles = await client.PullRequest.Files(githubOwner, githubRepo, data.ReviewId.Value);
if (!pullRequestFiles.Any(IsWebsiteFile))
{
log.Info("PR did not modify the site. Ignoring.");
return(req.CreateResponse(HttpStatusCode.NoContent));
}
var body = BuildCommentBody(data);
// Check if a comment already exists
var existingComments = await client.Issue.Comment.GetAllForIssue(githubOwner, githubRepo, data.ReviewId.Value);
var existingComment = existingComments.FirstOrDefault(
comment => comment.User.Login == ConfigurationManager.AppSettings["GitHubBotUser"]
);
if (existingComment != null)
{
// There's already an existing comment, so we'll just edit that one
// rather than posting a brand new comment.
await client.Issue.Comment.Update(githubOwner, githubRepo, existingComment.Id, body);
log.Info($"Updated existing commment {existingComment.Id}");
}
else
{
await client.Issue.Comment.Create(githubOwner, githubRepo, data.ReviewId.Value, body);
log.Info("Posted commment");
}
return(req.CreateResponse(HttpStatusCode.NoContent));
}
private static string BuildCommentBody(NetlifyHookBody data)
{
switch (data.State)
{
case "ready":
return($"Website preview is ready!\nBuilt with commit {data.CommitRef}\n{data.DeploySslUrl}");
case "error":
var netlifySite = ConfigurationManager.AppSettings["NetlifySite"];
var buildUrl = $"https://app.netlify.com/sites/{netlifySite}/deploys/{data.BuildId}";
return($"Failed to build the site :(\n\n```\n{data.ErrorMessage}\n```\n\nBuild log: {buildUrl}");
default:
return($"Unknown build state: {data.State}\n{data.DeploySslUrl}");
}
}
