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using System.Net.Http.Headers;
using System.Net.Mime;
using System.Text;
using System.Text.Json;
using Microsoft.Extensions.Options;
namespace CrupestApi.Todos;
public class TodosItem
{
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 TodosService
{
private readonly IOptionsSnapshot<TodosConfiguration> _options;
private readonly ILogger<TodosService> _logger;
public TodosService(IOptionsSnapshot<TodosConfiguration> options, ILogger<TodosService> logger)
{
_options = options;
_logger = logger;
}
private static string CreateGraphQLQuery(TodosConfiguration todoConfiguration)
{
return $$"""
{
user(login: "{{todoConfiguration.Username}}") {
projectV2(number: {{todoConfiguration.ProjectNumber}}) {
items(last: {{todoConfiguration.Count}}) {
nodes {
fieldValueByName(name: "Status") {
... on ProjectV2ItemFieldSingleSelectValue {
name
}
}
content {
__typename
... on Issue {
title
closed
}
... on PullRequest {
title
closed
}
... on DraftIssue {
title
}
}
}
}
}
}
}
""";
}
public async Task<List<TodosItem>> 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<TodosItem>();
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.");
}
bool done = false;
var statusField = node.GetProperty("fieldValueByName");
if (statusField.ValueKind != JsonValueKind.Null) // if there is a "Status" field
{
var statusName = statusField.GetProperty("name").GetString();
if (statusName is null)
{
throw new Exception("Fail to get status.");
}
// if name is "Done", then it is closed, otherwise we check if the issue is closed
if (statusName.Equals("Done", StringComparison.OrdinalIgnoreCase))
{
done = true;
}
}
JsonElement closedElement;
// if item has a "closed" field, then it is a pull request or an issue, and we check if it is closed
if (content.TryGetProperty("closed", out closedElement) && closedElement.GetBoolean())
{
done = true;
}
// If item "Status" field is "Done' or item is a pull request or issue and it is closed, then it is done.
// Otherwise it is not closed. Like:
// 1. it is a draft issue with no "Status" field or "Status" field is not "Done"
// 2. it is a pull request or issue with no "Status" field or "Status" field is not "Done" and it is not closed
result.Add(new TodosItem
{
Title = title,
Status = done ? "Done" : "Todo",
Closed = done,
Color = done ? "green" : "blue"
});
}
return result;
}
else
{
const string message = "Fail to get todos from GitHub.";
_logger.LogError(message);
throw new Exception(message);
}
}
}
|
