Struct ValidateFileUseCase 

pub struct ValidateFileUseCase;

Use case for validating .adapipe binary format files.

This use case validates the integrity and format of .adapipe files, providing both quick validation and comprehensive streaming validation options.

Responsibilities

• Validate file exists and has correct extension
• Verify binary format structure
• Read and validate metadata
• Display file properties and processing history
• Optionally perform full streaming validation

Dependencies

• BinaryFormatService: For format validation and metadata reading

Implementations

impl ValidateFileUseCase

pub fn new() -> Self

Creates a new Validate File use case.

pub async fn execute( &self, file_path: PathBuf, full_validation: bool, ) -> Result<()>

Executes the validate file use case.

Validates an .adapipe binary format file, checking structure, metadata, and optionally performing full streaming validation.

Parameters

• file_path - Path to .adapipe file to validate
• full_validation - If true, perform comprehensive streaming validation

Validation Steps

Step 1: Basic Format Validation

• File exists check
• Extension verification (.adapipe)
• Binary format structure validation
• Magic number verification
• Format version compatibility

Step 2: Metadata Reading

• Parse file header
• Extract metadata fields
• Display file properties:
  • Original filename and size
  • Original checksum
  • Format and app versions
  • Chunk size and count
  • Pipeline ID
  • Processing timestamp
  • Compression/encryption algorithms
  • Processing steps summary

Step 3: Full Validation (if requested)

• Stream through all chunks
• Decrypt encrypted data (if applicable)
• Decompress compressed data (if applicable)
• Verify original file checksum
• Note: Currently marked as TODO pending restoration service refactoring

Returns

• Ok(()) - File is valid
• Err(anyhow::Error) - Validation failed

Errors

Returns errors for:

• File not found
• Invalid file extension (warning only)
• Corrupt binary format
• Invalid metadata
• Checksum mismatch (full validation)
• Unsupported format version

Example Output

🔍 Validating .adapipe file format...
✅ File format is valid

📋 Reading file metadata...
   Original filename: data.txt
   Original size: 1.048 MB
   Original checksum: abc123...
   Format version: 1
   App version: 1.0.1
   Chunk size: 64.0 KB
   Chunk count: 16
   Pipeline ID: 01H2X3Y4Z5...
   Processed at: 2025-10-05 14:30:00 UTC
   🗜️  Compression: brotli
   🔒 Encryption: aes256gcm
   🔄 Processing steps: compression -> encryption -> checksum

💡 Use --full flag for complete streaming validation (decrypt/decompress/verify)

✅ .adapipe file validation completed successfully!

Trait Implementations

impl Default for ValidateFileUseCase

fn default() -> Self

Returns the “default value” for a type.