# All files / modules/ai/clients openrouter.client.ts

9.09% Statements 5/55
0% Branches 0/23
0% Functions 0/11
5.76% Lines 3/52

Press n or j to go to the next uncovered block, b, p or k for the previous block.

    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14
    15
    16
    17
    18
    19
    20
    21
    22
    23
    24
    25
    26
    27
    28
    29
    30
    31
    32
    33
    34
    35
    36
    37
    38
    39
    40
    41
    42
    43
    44
    45
    46
    47
    48
    49
    50
    51
    52
    53
    54
    55
    56
    57
    58
    59
    60
    61
    62
    63
    64
    65
    66
    67
    68
    69
    70
    71
    72
    73
    74
    75
    76
    77
    78
    79
    80
    81
    82
    83
    84
    85
    86
    87
    88
    89
    90
    91
    92
    93
    94
    95
    96
    97
    98
    99
    100
    101
    102
    103
    104
    105
    106
    107
    108
    109
    110
    111
    112
    113
    114
    115
    116
    117
    118
    119
    120
    121
    122
    123
    124
    125
    126
    127
    128
    129
    130
    131
    132
    133
    134
    135
    136
    137
    138
    139
    140
    141
    142
    143
    144
    145
    146
    147
    148
    149
    150
    151
    152
    153
    154
    155
    156
    157
    158
    159
    160
    161
    162
    163
    164
    165
    166
    167
    168
    169
    170
    171
    172
    173
    174
    175
    176
    177
    178
    179
    180
    181
    182
    183
    184
    185
    186
    187
    188
    189
    190
    191
    192
    193
    194
    195
    196
    197
    198
    199
    200
    201
    202
    203
    204
    205
    206
    207
    208
    209
    210
    211
    212
    213
    214
    215
    216
    217
    218
    219
    220
    221
    222
    223
    224
    225
    226
    227
    228
    229
    230
    231
    232
    233
    234
    2351x
    1x

    1x

     import { Injectable, Logger, OnModuleInit, BadRequestException } from '@nestjs/common';
    import { ConfigService } from '@nestjs/config';
    import { ChatRequestDto, ChatResponseDto, AIModelDto } from '../dto';

    interface OpenRouterRequest {
      model: string;
      messages: { role: string; content: string }[];
      temperature?: number;
      max_tokens?: number;
      top_p?: number;
      stream?: boolean;
    }

    interface OpenRouterResponse {
      id: string;
      model: string;
      choices: {
        index: number;
        message: { role: string; content: string };
        finish_reason: string;
      }[];
      usage: {
        prompt_tokens: number;
        completion_tokens: number;
        total_tokens: number;
      };
      created: number;
    }

    interface OpenRouterModel {
      id: string;
      name: string;
      description?: string;
      context_length: number;
      pricing: {
        prompt: string;
        completion: string;
      };
    }

    @Injectable()
    export class OpenRouterClient implements OnModuleInit {
      private readonly logger = new Logger(OpenRouterClient.name);
      private apiKey: string;
      private readonly baseUrl = 'https://openrouter.ai/api/v1';
      private readonly timeout: number;
      private isConfigured = false;

      constructor(private readonly configService: ConfigService) {
        this.timeout = this.configService.get<number>('AI_TIMEOUT_MS', 30000);
      }

      onModuleInit() {
        this.apiKey = this.configService.get<string>('OPENROUTER_API_KEY', '');
        Iif (!this.apiKey) {
          this.logger.warn('OpenRouter API key not configured. AI features will be disabled.');
          return;
        }
        this.isConfigured = true;
        this.logger.log('OpenRouter client initialized');
      }

      isReady(): boolean {
        return this.isConfigured;
      }

      private ensureConfigured(): void {
        Iif (!this.isConfigured) {
          throw new BadRequestException('AI service is not configured. Please set OPENROUTER_API_KEY.');
        }
      }

      async chatCompletion(
        dto: ChatRequestDto,
        defaultModel: string,
        defaultTemperature: number,
        defaultMaxTokens: number,
      ): Promise<ChatResponseDto> {
        this.ensureConfigured();

        const requestBody: OpenRouterRequest = {
          model: dto.model || defaultModel,
          messages: dto.messages,
          temperature: dto.temperature ?? defaultTemperature,
          max_tokens: dto.max_tokens ?? defaultMaxTokens,
          top_p: dto.top_p ?? 1.0,
          stream: false, // For now, no streaming
        };

        const startTime = Date.now();

        try {
          const response = await fetch(`${this.baseUrl}/chat/completions`, {
            method: 'POST',
            headers: {
              'Content-Type': 'application/json',
              Authorization: `Bearer ${this.apiKey}`,
              'HTTP-Referer': this.configService.get<string>('APP_URL', 'http://localhost:3001'),
              'X-Title': 'Template SaaS',
            },
            body: JSON.stringify(requestBody),
            signal: AbortSignal.timeout(this.timeout),
          });

          Iif (!response.ok) {
            const errorBody = await response.text();
            this.logger.error(`OpenRouter API error: ${response.status} - ${errorBody}`);
            throw new BadRequestException(`AI request failed: ${response.statusText}`);
          }

          const data: OpenRouterResponse = await response.json();
          const latencyMs = Date.now() - startTime;

          this.logger.debug(`Chat completion completed in ${latencyMs}ms, tokens: ${data.usage?.total_tokens}`);

          return {
            id: data.id,
            model: data.model,
            choices: data.choices.map((c) => ({
              index: c.index,
              message: {
                role: c.message.role as 'system' | 'user' | 'assistant',
                content: c.message.content,
              },
              finish_reason: c.finish_reason,
            })),
            usage: {
              prompt_tokens: data.usage?.prompt_tokens || 0,
              completion_tokens: data.usage?.completion_tokens || 0,
              total_tokens: data.usage?.total_tokens || 0,
            },
            created: data.created,
          };
        } catch (error) {
          Iif (error.name === 'AbortError') {
            throw new BadRequestException('AI request timed out');
          }
          throw error;
        }
      }

      async getModels(): Promise<AIModelDto[]> {
        this.ensureConfigured();

        try {
          const response = await fetch(`${this.baseUrl}/models`, {
            headers: {
              Authorization: `Bearer ${this.apiKey}`,
            },
            signal: AbortSignal.timeout(10000),
          });

          Iif (!response.ok) {
            throw new BadRequestException('Failed to fetch models');
          }

          const data = await response.json();
          const models: OpenRouterModel[] = data.data || [];

          // Filter to popular models
          const popularModels = [
            'anthropic/claude-3-haiku',
            'anthropic/claude-3-sonnet',
            'anthropic/claude-3-opus',
            'openai/gpt-4-turbo',
            'openai/gpt-4',
            'openai/gpt-3.5-turbo',
            'google/gemini-pro',
            'meta-llama/llama-3-70b-instruct',
          ];

          return models
            .filter((m) => popularModels.some((p) => m.id.includes(p.split('/')[1])))
            .slice(0, 20)
            .map((m) => ({
              id: m.id,
              name: m.name,
              provider: m.id.split('/')[0],
              context_length: m.context_length,
              pricing: {
                prompt: parseFloat(m.pricing.prompt) * 1000000, // Per million tokens
                completion: parseFloat(m.pricing.completion) * 1000000,
              },
            }));
        } catch (error) {
          this.logger.error('Failed to fetch models:', error);
          // Return default models if API fails
          return [
            {
              id: 'anthropic/claude-3-haiku',
              name: 'Claude 3 Haiku',
              provider: 'anthropic',
              context_length: 200000,
              pricing: { prompt: 0.25, completion: 1.25 },
            },
            {
              id: 'openai/gpt-3.5-turbo',
              name: 'GPT-3.5 Turbo',
              provider: 'openai',
              context_length: 16385,
              pricing: { prompt: 0.5, completion: 1.5 },
            },
          ];
        }
      }

      // Calculate cost for a request
      calculateCost(
        model: string,
        inputTokens: number,
        outputTokens: number,
      ): { input: number; output: number; total: number } {
        // Approximate pricing per million tokens (in USD)
        const pricing: Record<string, { input: number; output: number }> = {
          'anthropic/claude-3-haiku': { input: 0.25, output: 1.25 },
          'anthropic/claude-3-sonnet': { input: 3.0, output: 15.0 },
          'anthropic/claude-3-opus': { input: 15.0, output: 75.0 },
          'openai/gpt-4-turbo': { input: 10.0, output: 30.0 },
          'openai/gpt-4': { input: 30.0, output: 60.0 },
          'openai/gpt-3.5-turbo': { input: 0.5, output: 1.5 },
          default: { input: 1.0, output: 2.0 },
        };

        const modelPricing = pricing[model] || pricing.default;
        const inputCost = (inputTokens / 1_000_000) * modelPricing.input;
        const outputCost = (outputTokens / 1_000_000) * modelPricing.output;

        return {
          input: inputCost,
          output: outputCost,
          total: inputCost + outputCost,
        };
      }
    }