chore: import upstream snapshot with attribution

apps/sim/app/api/tools/cloudwatch/list-metrics/route.ts

@@ -0,0 +1,101 @@
+import { CloudWatchClient, ListMetricsCommand } from '@aws-sdk/client-cloudwatch'
+import { createLogger } from '@sim/logger'
+import { toError } from '@sim/utils/errors'
+import { type NextRequest, NextResponse } from 'next/server'
+import { awsCloudwatchListMetricsContract } from '@/lib/api/contracts/tools/aws/cloudwatch-list-metrics'
+import { parseToolRequest } from '@/lib/api/server'
+import { checkInternalAuth } from '@/lib/auth/hybrid'
+import { withRouteHandler } from '@/lib/core/utils/with-route-handler'
+
+const logger = createLogger('CloudWatchListMetrics')
+
+/** AWS ListMetrics returns up to 500 results per page. */
+const METRICS_PAGE_SIZE = 500
+
+/** Upper bound on pages drained to avoid unbounded loops on accounts with many metrics. */
+const MAX_METRICS_PAGES = 20
+
+export const POST = withRouteHandler(async (request: NextRequest) => {
+  try {
+    const auth = await checkInternalAuth(request)
+    if (!auth.success || !auth.userId) {
+      return NextResponse.json({ error: auth.error || 'Unauthorized' }, { status: 401 })
+    }
+
+    const parsed = await parseToolRequest(awsCloudwatchListMetricsContract, request, {
+      errorFormat: 'details',
+      logger,
+    })
+    if (!parsed.success) return parsed.response
+    const validatedData = parsed.data.body
+
+    logger.info('Listing CloudWatch metrics')
+
+    const client = new CloudWatchClient({
+      region: validatedData.region,
+      credentials: {
+        accessKeyId: validatedData.accessKeyId,
+        secretAccessKey: validatedData.secretAccessKey,
+      },
+    })
+
+    try {
+      const totalLimit = validatedData.limit ?? METRICS_PAGE_SIZE
+      const metrics: {
+        namespace: string
+        metricName: string
+        dimensions: { name: string; value: string }[]
+      }[] = []
+      let nextToken: string | undefined
+
+      for (let page = 0; page < MAX_METRICS_PAGES; page++) {
+        const command = new ListMetricsCommand({
+          ...(validatedData.namespace && { Namespace: validatedData.namespace }),
+          ...(validatedData.metricName && { MetricName: validatedData.metricName }),
+          ...(validatedData.recentlyActive && { RecentlyActive: 'PT3H' }),
+          ...(nextToken && { NextToken: nextToken }),
+        })
+
+        const response = await client.send(command)
+
+        for (const m of response.Metrics ?? []) {
+          metrics.push({
+            namespace: m.Namespace ?? '',
+            metricName: m.MetricName ?? '',
+            dimensions: (m.Dimensions ?? []).map((d) => ({
+              name: d.Name ?? '',
+              value: d.Value ?? '',
+            })),
+          })
+        }
+
+        nextToken = response.NextToken
+        if (!nextToken) break
+        if (metrics.length >= totalLimit) break
+
+        if (page === MAX_METRICS_PAGES - 1) {
+          logger.warn(
+            `ListMetrics hit pagination cap of ${MAX_METRICS_PAGES} pages; metric list may be incomplete`
+          )
+        }
+      }
+
+      const cappedMetrics = metrics.slice(0, totalLimit)
+
+      logger.info(`Successfully listed ${cappedMetrics.length} metrics`)
+
+      return NextResponse.json({
+        success: true,
+        output: { metrics: cappedMetrics },
+      })
+    } finally {
+      client.destroy()
+    }
+  } catch (error) {
+    logger.error('ListMetrics failed', { error: toError(error).message })
+    return NextResponse.json(
+      { error: `Failed to list CloudWatch metrics: ${toError(error).message}` },
+      { status: 500 }
+    )
+  }
+})