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263 lines
10 KiB
263 lines
10 KiB
using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Net.Http;
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using System.Net.Http.Headers;
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using System.Threading.Tasks;
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using DiscordChatExporter.Core.Models;
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using DiscordChatExporter.Core.Services.Exceptions;
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using DiscordChatExporter.Core.Services.Internal;
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using Failsafe;
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using Newtonsoft.Json;
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using Newtonsoft.Json.Linq;
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using Tyrrrz.Extensions;
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namespace DiscordChatExporter.Core.Services
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{
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public partial class DataService : IDisposable
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{
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private readonly HttpClient _httpClient = new HttpClient();
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private async Task<JToken> GetApiResponseAsync(AuthToken token, string resource, string endpoint,
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params string[] parameters)
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{
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// Create retry policy
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var retry = Retry.Create()
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.Catch<HttpErrorStatusCodeException>(false, e => (int) e.StatusCode >= 500)
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.Catch<HttpErrorStatusCodeException>(false, e => (int) e.StatusCode == 429)
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.WithMaxTryCount(10)
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.WithDelay(TimeSpan.FromSeconds(0.4));
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// Send request
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return await retry.ExecuteAsync(async () =>
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{
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// Create request
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const string apiRoot = "https://discordapp.com/api/v6";
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using (var request = new HttpRequestMessage(HttpMethod.Get, $"{apiRoot}/{resource}/{endpoint}"))
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{
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// Set authorization header
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request.Headers.Authorization = token.Type == AuthTokenType.Bot
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? new AuthenticationHeaderValue("Bot", token.Value)
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: new AuthenticationHeaderValue(token.Value);
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// Add parameters
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foreach (var parameter in parameters)
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{
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var key = parameter.SubstringUntil("=");
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var value = parameter.SubstringAfter("=");
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// Skip empty values
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if (value.IsNullOrWhiteSpace())
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continue;
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request.RequestUri = request.RequestUri.SetQueryParameter(key, value);
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}
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// Get response
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using (var response = await _httpClient.SendAsync(request))
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{
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// Check status code
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// We throw our own exception here because default one doesn't have status code
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if (!response.IsSuccessStatusCode)
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throw new HttpErrorStatusCodeException(response.StatusCode, response.ReasonPhrase);
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// Get content
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var raw = await response.Content.ReadAsStringAsync();
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// Parse
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using (var reader = new JsonTextReader(new StringReader(raw)))
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{
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reader.DateParseHandling = DateParseHandling.DateTimeOffset;
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return JToken.Load(reader);
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}
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}
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}
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});
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}
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public async Task<Guild> GetGuildAsync(AuthToken token, string guildId)
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{
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// Special case for direct messages pseudo-guild
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if (guildId == Guild.DirectMessages.Id)
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return Guild.DirectMessages;
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var response = await GetApiResponseAsync(token, "guilds", guildId);
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var guild = ParseGuild(response);
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return guild;
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}
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public async Task<Channel> GetChannelAsync(AuthToken token, string channelId)
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{
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var response = await GetApiResponseAsync(token, "channels", channelId);
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var channel = ParseChannel(response);
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return channel;
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}
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public async Task<IReadOnlyList<Guild>> GetUserGuildsAsync(AuthToken token)
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{
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var response = await GetApiResponseAsync(token, "users", "@me/guilds", "limit=100");
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var guilds = response.Select(ParseGuild).ToArray();
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return guilds;
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}
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public async Task<IReadOnlyList<Channel>> GetDirectMessageChannelsAsync(AuthToken token)
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{
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var response = await GetApiResponseAsync(token, "users", "@me/channels");
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var channels = response.Select(ParseChannel).ToArray();
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return channels;
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}
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public async Task<IReadOnlyList<Channel>> GetGuildChannelsAsync(AuthToken token, string guildId)
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{
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var response = await GetApiResponseAsync(token, "guilds", $"{guildId}/channels");
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var channels = response.Select(ParseChannel).ToArray();
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return channels;
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}
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public async Task<IReadOnlyList<Role>> GetGuildRolesAsync(AuthToken token, string guildId)
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{
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var response = await GetApiResponseAsync(token, "guilds", $"{guildId}/roles");
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var roles = response.Select(ParseRole).ToArray();
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return roles;
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}
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public async Task<IReadOnlyList<Message>> GetChannelMessagesAsync(AuthToken token, string channelId,
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DateTimeOffset? after = null, DateTimeOffset? before = null, IProgress<double> progress = null)
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{
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var result = new List<Message>();
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// Get the last message
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var response = await GetApiResponseAsync(token, "channels", $"{channelId}/messages",
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"limit=1", $"before={before?.ToSnowflake()}");
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var lastMessage = response.Select(ParseMessage).FirstOrDefault();
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// If the last message doesn't exist or it's outside of range - return
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if (lastMessage == null || lastMessage.Timestamp < after)
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{
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progress?.Report(1);
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return result;
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}
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// Get other messages
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var offsetId = after?.ToSnowflake() ?? "0";
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while (true)
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{
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// Get message batch
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response = await GetApiResponseAsync(token, "channels", $"{channelId}/messages",
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"limit=100", $"after={offsetId}");
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// Parse
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var messages = response
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.Select(ParseMessage)
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.Reverse() // reverse because messages appear newest first
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.ToArray();
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// Break if there are no messages (can happen if messages are deleted during execution)
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if (!messages.Any())
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break;
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// Trim messages to range (until last message)
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var messagesInRange = messages
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.TakeWhile(m => m.Id != lastMessage.Id && m.Timestamp < lastMessage.Timestamp)
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.ToArray();
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// Add to result
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result.AddRange(messagesInRange);
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// Break if messages were trimmed (which means the last message was encountered)
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if (messagesInRange.Length != messages.Length)
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break;
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// Report progress (based on the time range of parsed messages compared to total)
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progress?.Report((result.Last().Timestamp - result.First().Timestamp).TotalSeconds /
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(lastMessage.Timestamp - result.First().Timestamp).TotalSeconds);
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// Move offset
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offsetId = result.Last().Id;
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}
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// Add last message
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result.Add(lastMessage);
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// Report progress
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progress?.Report(1);
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return result;
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}
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public async Task<Mentionables> GetMentionablesAsync(AuthToken token, string guildId,
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IEnumerable<Message> messages)
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{
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// Get channels and roles
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var channels = guildId != Guild.DirectMessages.Id
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? await GetGuildChannelsAsync(token, guildId)
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: Array.Empty<Channel>();
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var roles = guildId != Guild.DirectMessages.Id
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? await GetGuildRolesAsync(token, guildId)
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: Array.Empty<Role>();
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// Get users
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var userMap = new Dictionary<string, User>();
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foreach (var message in messages)
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{
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// Author
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userMap[message.Author.Id] = message.Author;
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// Mentioned users
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foreach (var mentionedUser in message.MentionedUsers)
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userMap[mentionedUser.Id] = mentionedUser;
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}
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var users = userMap.Values.ToArray();
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return new Mentionables(users, channels, roles);
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}
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public async Task<ChatLog> GetChatLogAsync(AuthToken token, Guild guild, Channel channel,
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DateTimeOffset? after = null, DateTimeOffset? before = null, IProgress<double> progress = null)
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{
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// Get messages
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var messages = await GetChannelMessagesAsync(token, channel.Id, after, before, progress);
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// Get mentionables
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var mentionables = await GetMentionablesAsync(token, guild.Id, messages);
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return new ChatLog(guild, channel, after, before, messages, mentionables);
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}
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public async Task<ChatLog> GetChatLogAsync(AuthToken token, Channel channel,
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DateTimeOffset? after = null, DateTimeOffset? before = null, IProgress<double> progress = null)
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{
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// Get guild
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var guild = channel.GuildId == Guild.DirectMessages.Id
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? Guild.DirectMessages
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: await GetGuildAsync(token, channel.GuildId);
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// Get the chat log
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return await GetChatLogAsync(token, guild, channel, after, before, progress);
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}
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public async Task<ChatLog> GetChatLogAsync(AuthToken token, string channelId,
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DateTimeOffset? after = null, DateTimeOffset? before = null, IProgress<double> progress = null)
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{
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// Get channel
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var channel = await GetChannelAsync(token, channelId);
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// Get the chat log
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return await GetChatLogAsync(token, channel, after, before, progress);
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}
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public void Dispose()
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{
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_httpClient.Dispose();
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}
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}
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} |