Chris Chen
53 lines
2.2 KiB
C#
53 lines
2.2 KiB
C#
using System.Net.Http.Headers;
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using System.Net.Http.Json;
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using Microsoft.Extensions.Options;
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namespace ROLAC.API.Services.Notifications;
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/// <summary>Sends text messages and replies via the Line Messaging API REST endpoints.</summary>
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public sealed class LineMessageChannel : IMessageChannel
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{
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private const string PushUrl = "https://api.line.me/v2/bot/message/push";
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private const string ReplyUrl = "https://api.line.me/v2/bot/message/reply";
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private readonly HttpClient _http;
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private readonly LineOptions _options;
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public LineMessageChannel(HttpClient http, IOptions<LineOptions> options)
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{
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_http = http;
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_options = options.Value;
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}
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public Task<MessageSendResult> PushToUserAsync(string externalId, string text, CancellationToken ct = default)
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=> PostAsync(PushUrl, new { to = externalId, messages = new[] { new { type = "text", text } } }, ct);
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public Task<MessageSendResult> PushToGroupAsync(string externalId, string text, CancellationToken ct = default)
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=> PostAsync(PushUrl, new { to = externalId, messages = new[] { new { type = "text", text } } }, ct);
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public Task<MessageSendResult> ReplyAsync(string replyToken, string text, CancellationToken ct = default)
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=> PostAsync(ReplyUrl, new { replyToken, messages = new[] { new { type = "text", text } } }, ct);
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private async Task<MessageSendResult> PostAsync(string url, object payload, CancellationToken ct)
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{
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try
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{
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using var request = new HttpRequestMessage(HttpMethod.Post, url)
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{
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Content = JsonContent.Create(payload),
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};
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request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", _options.ChannelAccessToken);
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using var response = await _http.SendAsync(request, ct);
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if (response.IsSuccessStatusCode) return new MessageSendResult(true, null);
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var body = await response.Content.ReadAsStringAsync(ct);
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return new MessageSendResult(false, $"{(int)response.StatusCode}: {body}");
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}
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catch (Exception ex)
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{
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return new MessageSendResult(false, ex.Message);
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}
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}
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}
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