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| 1 | +import { readFileSync } from "node:fs"; |
| 2 | +import { SlackClient } from "../slack-client.js"; |
| 3 | +import { ElevenLabsSTTClient } from "../elevenlabs-client.js"; |
| 4 | +import type { |
| 5 | + SendAudioParams, |
| 6 | + SendImageParams, |
| 7 | + McpToolResult, |
| 8 | +} from "../types.js"; |
| 9 | +import { SlackAdvancedMCPError } from "../types.js"; |
| 10 | + |
| 11 | +export class UploadTools { |
| 12 | + constructor( |
| 13 | + private readonly slack: SlackClient, |
| 14 | + private readonly elevenlabs: ElevenLabsSTTClient | null |
| 15 | + ) {} |
| 16 | + |
| 17 | + async sendAudio(params: SendAudioParams): Promise<McpToolResult> { |
| 18 | + try { |
| 19 | + if (params.text) { |
| 20 | + return this.generateAndSend(params); |
| 21 | + } |
| 22 | + return this.uploadAndSend(params, "audio"); |
| 23 | + } catch (error) { |
| 24 | + return this.formatError(error); |
| 25 | + } |
| 26 | + } |
| 27 | + |
| 28 | + async sendImage(params: SendImageParams): Promise<McpToolResult> { |
| 29 | + try { |
| 30 | + return this.uploadAndSend(params, "image"); |
| 31 | + } catch (error) { |
| 32 | + return this.formatError(error); |
| 33 | + } |
| 34 | + } |
| 35 | + |
| 36 | + private async generateAndSend(params: SendAudioParams): Promise<McpToolResult> { |
| 37 | + if (!this.elevenlabs) { |
| 38 | + return this.ok({ |
| 39 | + error: "ELEVENLABS_API_KEY not configured. TTS audio generation is unavailable.", |
| 40 | + }); |
| 41 | + } |
| 42 | + |
| 43 | + const audioBuffer = await this.elevenlabs.textToSpeech({ |
| 44 | + text: params.text!, |
| 45 | + voiceId: params.voice_id, |
| 46 | + languageCode: params.language_code, |
| 47 | + }); |
| 48 | + |
| 49 | + const channelId = await this.resolveTarget(params.target, params.target_type); |
| 50 | + |
| 51 | + const filename = params.filename === "audio.mp3" ? "voice-message.mp3" : params.filename; |
| 52 | + |
| 53 | + const result = await this.slack.uploadFile({ |
| 54 | + channelId, |
| 55 | + fileBuffer: audioBuffer, |
| 56 | + filename, |
| 57 | + initialComment: params.message, |
| 58 | + threadTs: params.thread_ts, |
| 59 | + }); |
| 60 | + |
| 61 | + return this.ok({ |
| 62 | + sent: true, |
| 63 | + type: "tts_audio", |
| 64 | + channel: channelId, |
| 65 | + target: params.target, |
| 66 | + target_type: params.target_type, |
| 67 | + file_id: result.fileId, |
| 68 | + permalink: result.permalink, |
| 69 | + filename, |
| 70 | + size_bytes: audioBuffer.length, |
| 71 | + tts_text: params.text, |
| 72 | + voice_id: params.voice_id ?? "default", |
| 73 | + }); |
| 74 | + } |
| 75 | + |
| 76 | + private async uploadAndSend( |
| 77 | + params: SendAudioParams | SendImageParams, |
| 78 | + type: "audio" | "image" |
| 79 | + ): Promise<McpToolResult> { |
| 80 | + if (!params.file_path && !params.file_base64) { |
| 81 | + return this.ok({ error: "Either text (for TTS), file_path, or file_base64 is required" }); |
| 82 | + } |
| 83 | + |
| 84 | + let fileBuffer: Buffer; |
| 85 | + |
| 86 | + if (params.file_base64) { |
| 87 | + fileBuffer = Buffer.from(params.file_base64, "base64"); |
| 88 | + } else { |
| 89 | + try { |
| 90 | + fileBuffer = readFileSync(params.file_path!); |
| 91 | + } catch (err) { |
| 92 | + return this.ok({ |
| 93 | + error: `Failed to read file: ${err instanceof Error ? err.message : String(err)}`, |
| 94 | + }); |
| 95 | + } |
| 96 | + } |
| 97 | + |
| 98 | + const channelId = await this.resolveTarget(params.target, params.target_type); |
| 99 | + |
| 100 | + const result = await this.slack.uploadFile({ |
| 101 | + channelId, |
| 102 | + fileBuffer, |
| 103 | + filename: params.filename, |
| 104 | + initialComment: params.message, |
| 105 | + threadTs: params.thread_ts, |
| 106 | + }); |
| 107 | + |
| 108 | + return this.ok({ |
| 109 | + sent: true, |
| 110 | + type, |
| 111 | + channel: channelId, |
| 112 | + target: params.target, |
| 113 | + target_type: params.target_type, |
| 114 | + file_id: result.fileId, |
| 115 | + permalink: result.permalink, |
| 116 | + filename: params.filename, |
| 117 | + size_bytes: fileBuffer.length, |
| 118 | + }); |
| 119 | + } |
| 120 | + |
| 121 | + private async resolveTarget(target: string, targetType: "user" | "channel"): Promise<string> { |
| 122 | + if (targetType === "user") { |
| 123 | + const userId = await this.slack.resolveUserId(target); |
| 124 | + return this.slack.openDm(userId); |
| 125 | + } |
| 126 | + return this.slack.resolveChannelId(target); |
| 127 | + } |
| 128 | + |
| 129 | + private ok(data: unknown): McpToolResult { |
| 130 | + return { |
| 131 | + content: [{ type: "text", text: JSON.stringify(data, null, 2) }], |
| 132 | + }; |
| 133 | + } |
| 134 | + |
| 135 | + private formatError(error: unknown): McpToolResult { |
| 136 | + const message = |
| 137 | + error instanceof SlackAdvancedMCPError |
| 138 | + ? `Slack Error: ${error.message}` |
| 139 | + : error instanceof Error |
| 140 | + ? `Unexpected error: ${error.message}` |
| 141 | + : "Unexpected error: Unknown error"; |
| 142 | + |
| 143 | + return { |
| 144 | + content: [{ type: "text", text: JSON.stringify({ error: message }, null, 2) }], |
| 145 | + }; |
| 146 | + } |
| 147 | +} |
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