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using System;
using System.Collections.Generic;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Net.Mime;
using System.Text;
using System.Text.Json;
using System.Threading.Tasks;
using CrupestApi.Config;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;
namespace CrupestApi.Services
{
public class TodoItem
{
public string Status { get; set; } = default!;
public string Title { get; set; } = default!;
public bool Closed { get; set; }
public string color { get; set; } = default!;
}
public class TodoService
{
private readonly IOptionsSnapshot<TodoConfiguration> _options;
private readonly ILogger<TodoService> _logger;
public TodoService(IOptionsSnapshot<TodoConfiguration> options, ILogger<TodoService> logger)
{
_options = options;
_logger = logger;
}
private static string CreateGraphQLQuery(TodoConfiguration todoConfiguration)
{
return $$"""
{
user(login: "{{todoConfiguration.Username}}") {
projectV2(number: {{todoConfiguration.ProjectNumber}}) {
items(last: {{todoConfiguration.Count}}) {
nodes {
__typename
content {
__typename
... on Issue {
title
closed
}
... on PullRequest {
title
closed
}
... on DraftIssue {
title
}
}
}
}
}
}
}
""";
}
public async Task<List<TodoItem>> GetTodosAsync()
{
var todoOptions = _options.Value;
if (todoOptions is null)
{
throw new Exception("Fail to get todos configuration.");
}
_logger.LogInformation("Username: {}; ProjectNumber: {}; Count: {}", todoOptions.Username, todoOptions.ProjectNumber, todoOptions.Count);
_logger.LogInformation("Getting todos from GitHub GraphQL API...");
using var httpClient = new HttpClient();
using var requestContent = new StringContent(JsonSerializer.Serialize(new
{
query = CreateGraphQLQuery(todoOptions)
}));
requestContent.Headers.ContentType = new MediaTypeHeaderValue(MediaTypeNames.Application.Json, Encoding.UTF8.WebName);
using var request = new HttpRequestMessage(HttpMethod.Post, "https://api.github.com/graphql");
request.Content = requestContent;
request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", todoOptions.Token);
request.Headers.TryAddWithoutValidation("User-Agent", todoOptions.Username);
using var response = await httpClient.SendAsync(request);
var responseBody = await response.Content.ReadAsStringAsync();
_logger.LogInformation("GitHub server returned status code: {}", response.StatusCode);
_logger.LogInformation("GitHub server returned body: {}", responseBody);
if (response.IsSuccessStatusCode)
{
using var responseJson = JsonSerializer.Deserialize<JsonDocument>(responseBody);
if (responseJson is null)
{
throw new Exception("Fail to deserialize response body.");
}
var nodes = responseJson.RootElement.GetProperty("data").GetProperty("user").GetProperty("projectV2").GetProperty("items").GetProperty("nodes").EnumerateArray();
var result = new List<TodoItem>();
foreach (var node in nodes)
{
var content = node.GetProperty("content");
var title = content.GetProperty("title").GetString();
if (title is null)
{
throw new Exception("Fail to get title.");
}
JsonElement closedElement;
bool closed;
if (content.TryGetProperty("closed", out closedElement))
{
closed = closedElement.GetBoolean();
}
else
{
closed = false;
}
result.Add(new TodoItem
{
Title = title,
Status = closed ? "Done" : "Todo",
Closed = closed,
color = closed ? "green" : "blue"
});
}
return result;
}
else
{
const string message = "Fail to get todos from GitHub.";
_logger.LogError(message);
throw new Exception(message);
}
}
}
}
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