route.ts

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import { NextRequest, NextResponse } from 'next/server';
import { fieldpineServerApi } from '@/lib/server/fieldpineApi';
import { getRequestContext } from '@/lib/server/sessionUtils';
 
/**
 * eLink/BUCK Printer-Cartridge Relationships Endpoint
 * Uses Fieldpine's BUCK API via eLink protocol
 * Endpoint: retailmax.elink.printercartridge
 */
export async function GET(request: NextRequest) {
  try {
    // Get request context with authentication
    const context = await getRequestContext(request);
    if (!context?.session) {
      return NextResponse.json(
        { error: 'Authentication required' },
        { status: 401 }
      );
    }
 
    // Rate limiting
    const clientId = request.headers.get('x-forwarded-for') || 
                    request.headers.get('x-real-ip') || 
                    context.session.userId || 
                    'unknown';
    if (!fieldpineServerApi.checkClientRateLimit(clientId)) {
      return NextResponse.json(
        { error: 'Rate limit exceeded' },
        { status: 429 }
      );
    }
 
    // Parse query parameters
    const { searchParams } = new URL(request.url);
    const limit = searchParams.get('limit') || '5000';
    const want = searchParams.get('want');
    const filter = searchParams.get('filter');
 
    // Build BUCK API call parameters
    const buckParams: Record<string, string> = {
      "3": "retailmax.elink.printercartridge",
      "8": limit
    };
 
    if (want) buckParams["10"] = want;
    if (filter) buckParams["9"] = filter;
 
    // Call Fieldpine BUCK API via eLink protocol
    try {
      const result = await fieldpineServerApi.buckApiCall(buckParams, context.session.apiKey);
      
      console.log(`[ELINK Printer-Cartridge] Loaded relationships`);
      
      return NextResponse.json({ 
        success: true, 
        data: result,
        source: 'elink'
      });
      
    } catch (error) {
      console.error('eLink printer-cartridge error:', error);
      return NextResponse.json(
        { error: 'eLink endpoint unavailable', source: 'elink' },
        { status: 503 }
      );
    }
 
  } catch (error) {
    console.error('eLink printer-cartridge error:', error);
    return NextResponse.json(
      { error: 'Failed to fetch printer-cartridge relationships' },
      { status: 500 }
    );
  }
}