private EaRepository GetRepoForProject(string projectName)
{
// TODO: thread savety??
EaRepository repo;
if (repoCache.TryGetValue(projectName, out repo))
{
return(repo);
}
else
{
Console.WriteLine("opening repo {0} and adding it to cache", projectName);
string key = "repo-" + projectName;
string path = ConfigurationManager.AppSettings[key];
if (string.IsNullOrEmpty(path))
{
throw new ArgumentException("a repository with the given name does not exist");
}
repo = new EaRepository(path);
repoCache.Add(projectName, repo);
return(repo);
}
}
private const int DIAGRAM_CACHE_DURATION = 60; // 60 seconds cache
public IndexModule(IRootPathProvider pathProvider)
{
Get["/"] = parameters =>
{
return(View["index"]);
};
Get["/api/v1/projects"] = _ =>
{
string srepos = ConfigurationManager.AppSettings["repos"];
var repos = srepos.Split('|');
var projects = from r in repos select new Project()
{
Name = r
};
return(projects);
};
Get["/api/v1/projects/{project:alpha}/diagrams/{guid:guid}/img"] = parameters =>
{
Console.WriteLine("Fetching image {0} in {1}", parameters.guid, parameters.project);
string guid = parameters.guid;
EaRepository rep = GetRepoForProject(parameters.project);
Diagram diag = rep.GetDiagramByGuid(parameters.guid);
var root = Path.Combine(pathProvider.GetRootPath(), "Images", parameters.project);
if (!Directory.Exists(root))
{
Directory.CreateDirectory(root);
}
string path = AppServices.Cache.Get <string>(guid, DateTime.Now.AddSeconds(DIAGRAM_CACHE_DURATION), () => {
var picpath = Path.Combine(root, parameters.guid) + ".png";
Console.WriteLine("Generating image {0}", picpath);
rep.ExportDiagram(diag.Id, picpath);
return(picpath);
});
return(new GenericFileResponse(path));
//var stream = new FileStream(path, FileMode.Open);
//return Response.FromStream(stream, "image/png").WithHeader("Cache-Control", "public, max-age=60");
};
}