fix(kb-upload): fix and consolidate KB file uploads logic

apps/sim/app/api/__test-utils__/utils.ts

@@ -764,6 +764,20 @@ export function createStorageProviderMocks(options: StorageProviderMockOptions =
         bucket: 'test-s3-bucket',
         region: 'us-east-1',
       },
+      S3_KB_CONFIG: {
+        bucket: 'test-s3-kb-bucket',
+        region: 'us-east-1',
+      },
+      BLOB_CONFIG: {
+        accountName: 'testaccount',
+        accountKey: 'testkey',
+        containerName: 'test-container',
+      },
+      BLOB_KB_CONFIG: {
+        accountName: 'testaccount',
+        accountKey: 'testkey',
+        containerName: 'test-kb-container',
+      },
     }))
 
     vi.doMock('@aws-sdk/client-s3', () => ({
@@ -806,6 +820,11 @@ export function createStorageProviderMocks(options: StorageProviderMockOptions =
         accountKey: 'testkey',
         containerName: 'test-container',
       },
+      BLOB_KB_CONFIG: {
+        accountName: 'testaccount',
+        accountKey: 'testkey',
+        containerName: 'test-kb-container',
+      },
     }))
 
     vi.doMock('@azure/storage-blob', () => ({

apps/sim/app/api/files/presigned/route.test.ts

@@ -39,8 +39,9 @@ describe('/api/files/presigned', () => {
       const response = await POST(request)
       const data = await response.json()
 
-      expect(response.status).toBe(400)
+      expect(response.status).toBe(500) // Changed from 400 to 500 (StorageConfigError)
       expect(data.error).toBe('Direct uploads are only available when cloud storage is enabled')
+      expect(data.code).toBe('STORAGE_CONFIG_ERROR')
       expect(data.directUploadSupported).toBe(false)
     })
 
@@ -64,7 +65,8 @@ describe('/api/files/presigned', () => {
       const data = await response.json()
 
       expect(response.status).toBe(400)
-      expect(data.error).toBe('Missing fileName or contentType')
+      expect(data.error).toBe('fileName is required and cannot be empty')
+      expect(data.code).toBe('VALIDATION_ERROR')
     })
 
     it('should return error when contentType is missing', async () => {
@@ -87,7 +89,59 @@ describe('/api/files/presigned', () => {
       const data = await response.json()
 
       expect(response.status).toBe(400)
-      expect(data.error).toBe('Missing fileName or contentType')
+      expect(data.error).toBe('contentType is required and cannot be empty')
+      expect(data.code).toBe('VALIDATION_ERROR')
+    })
+
+    it('should return error when fileSize is invalid', async () => {
+      setupFileApiMocks({
+        cloudEnabled: true,
+        storageProvider: 's3',
+      })
+
+      const { POST } = await import('./route')
+
+      const request = new NextRequest('http://localhost:3000/api/files/presigned', {
+        method: 'POST',
+        body: JSON.stringify({
+          fileName: 'test.txt',
+          contentType: 'text/plain',
+          fileSize: 0,
+        }),
+      })
+
+      const response = await POST(request)
+      const data = await response.json()
+
+      expect(response.status).toBe(400)
+      expect(data.error).toBe('fileSize must be a positive number')
+      expect(data.code).toBe('VALIDATION_ERROR')
+    })
+
+    it('should return error when file size exceeds limit', async () => {
+      setupFileApiMocks({
+        cloudEnabled: true,
+        storageProvider: 's3',
+      })
+
+      const { POST } = await import('./route')
+
+      const largeFileSize = 150 * 1024 * 1024 // 150MB (exceeds 100MB limit)
+      const request = new NextRequest('http://localhost:3000/api/files/presigned', {
+        method: 'POST',
+        body: JSON.stringify({
+          fileName: 'large-file.txt',
+          contentType: 'text/plain',
+          fileSize: largeFileSize,
+        }),
+      })
+
+      const response = await POST(request)
+      const data = await response.json()
+
+      expect(response.status).toBe(400)
+      expect(data.error).toContain('exceeds maximum allowed size')
+      expect(data.code).toBe('VALIDATION_ERROR')
     })
 
     it('should generate S3 presigned URL successfully', async () => {
@@ -122,6 +176,34 @@ describe('/api/files/presigned', () => {
       expect(data.directUploadSupported).toBe(true)
     })
 
+    it('should generate knowledge-base S3 presigned URL with kb prefix', async () => {
+      setupFileApiMocks({
+        cloudEnabled: true,
+        storageProvider: 's3',
+      })
+
+      const { POST } = await import('./route')
+
+      const request = new NextRequest(
+        'http://localhost:3000/api/files/presigned?type=knowledge-base',
+        {
+          method: 'POST',
+          body: JSON.stringify({
+            fileName: 'knowledge-doc.pdf',
+            contentType: 'application/pdf',
+            fileSize: 2048,
+          }),
+        }
+      )
+
+      const response = await POST(request)
+      const data = await response.json()
+
+      expect(response.status).toBe(200)
+      expect(data.fileInfo.key).toMatch(/^kb\/.*knowledge-doc\.pdf$/)
+      expect(data.directUploadSupported).toBe(true)
+    })
+
     it('should generate Azure Blob presigned URL successfully', async () => {
       setupFileApiMocks({
         cloudEnabled: true,
@@ -182,8 +264,9 @@ describe('/api/files/presigned', () => {
       const response = await POST(request)
       const data = await response.json()
 
-      expect(response.status).toBe(400)
-      expect(data.error).toBe('Unknown storage provider')
+      expect(response.status).toBe(500) // Changed from 400 to 500 (StorageConfigError)
+      expect(data.error).toBe('Unknown storage provider: unknown') // Updated error message
+      expect(data.code).toBe('STORAGE_CONFIG_ERROR')
       expect(data.directUploadSupported).toBe(false)
     })
 
@@ -225,8 +308,10 @@ describe('/api/files/presigned', () => {
       const data = await response.json()
 
       expect(response.status).toBe(500)
-      expect(data.error).toBe('Error')
-      expect(data.message).toBe('S3 service unavailable')
+      expect(data.error).toBe(
+        'Failed to generate S3 presigned URL - check AWS credentials and permissions'
+      ) // Updated error message
+      expect(data.code).toBe('STORAGE_CONFIG_ERROR')
     })
 
     it('should handle Azure Blob errors gracefully', async () => {
@@ -269,8 +354,8 @@ describe('/api/files/presigned', () => {
       const data = await response.json()
 
       expect(response.status).toBe(500)
-      expect(data.error).toBe('Error')
-      expect(data.message).toBe('Azure service unavailable')
+      expect(data.error).toBe('Failed to generate Azure Blob presigned URL') // Updated error message
+      expect(data.code).toBe('STORAGE_CONFIG_ERROR')
     })
 
     it('should handle malformed JSON gracefully', async () => {
@@ -289,9 +374,9 @@ describe('/api/files/presigned', () => {
       const response = await POST(request)
       const data = await response.json()
 
-      expect(response.status).toBe(500)
-      expect(data.error).toBe('SyntaxError')
-      expect(data.message).toContain('Unexpected token')
+      expect(response.status).toBe(400) // Changed from 500 to 400 (ValidationError)
+      expect(data.error).toBe('Invalid JSON in request body') // Updated error message
+      expect(data.code).toBe('VALIDATION_ERROR')
     })
   })