Receipt Image Picker Integration
Component Detail
Description
Wraps the Flutter image_picker package to provide a unified interface for both camera capture and gallery/file-picker selection. Abstracts platform differences between iOS and Android and returns a normalized file result with MIME type detection for PDFs and images.
receipt-image-picker-integration
Summaries
The Receipt Image Picker Integration enables employees to attach expense receipts directly from their mobile device — either by photographing a paper receipt on the spot or selecting an existing image or PDF from their files. This removes a major friction point in the expense submission process: employees no longer need to scan and email documents separately, reducing submission abandonment and accelerating reimbursement cycles. Faster, easier submissions improve employee satisfaction and increase policy compliance rates. As a shared component used across multiple product features, the investment in building it correctly pays dividends across the entire mobile application, not just a single workflow.
This shared, low-complexity component must be delivered before any feature that involves receipt attachment, making it a critical path dependency. Development scope includes wrapping the Flutter image_picker package, abstracting iOS and Android permission flows, and implementing MIME type detection for both image and PDF formats. Testing must cover both platforms independently: camera capture on iOS and Android, gallery selection, permission denial flows, and MIME detection for JPEG, PNG, and PDF inputs. Because this component is marked shared, any breaking interface change will cascade across all dependent features simultaneously — version stability and backward-compatible extension should be enforced from the start.
Allow additional QA time for physical device testing, as simulator behavior for camera and permissions differs from real hardware.
This component wraps the flutter image_picker package and expo/react-native equivalents to present a single normalized API regardless of platform. captureFromCamera() invokes ImagePicker.pickImage(source: ImageSource.camera) with configurable ImageQuality; pickFromGallery() uses ImagePicker.pickImage or a file_picker call when PDF support is required, driven by the allowedExtensions parameter. The returned XFile is normalized to a dart:io File. getMimeType() inspects the file extension and, optionally, reads magic bytes for ambiguous cases to return the correct MIME string (image/jpeg, image/png, application/pdf).
Permission methods delegate to the permission_handler package, exposing a clean isPermissionGranted() check before any picker invocation to avoid uncaught platform exceptions. Because this component is shared, it must remain stateless and side-effect-free — callers own navigation and error display.
Responsibilities
- Launch device camera for live photo capture
- Open file picker for gallery images and scanned PDFs
- Normalize platform-specific file references to a common File type
- Detect and report MIME type of the selected file
- Handle permissions prompts for camera and photo library access
Interfaces
captureFromCamera({ImageQuality quality})
pickFromGallery({List<String> allowedExtensions})
requestCameraPermission()
requestGalleryPermission()
getMimeType(File file)
isPermissionGranted(PermissionType type)
Relationships
Used Integrations (1)
External integrations and APIs this component relies on