Module CreateState 

CreateState

File: Indexing/State/CreateState.rs

Role in Air Architecture

Provides state creation functions for the File Indexer service, including the construction of index entries, symbols, and related data structures used throughout the indexing system.

Primary Responsibility

Create and initialize index state structures including FileIndex, FileMetadata, SymbolInfo, and related types.

Secondary Responsibilities

• Generate index version strings
• Calculate index checksums for integrity verification
• Create new empty indexes
• Backup corrupted indexes

Dependencies

External Crates:

• chrono - Timestamp generation for index metadata
• sha2 - Checksum calculation for index integrity
• serde - Serialization/deserialization of index structures

Internal Modules:

• crate::Result - Error handling type
• crate::AirError - Error types

Dependents

• Indexing::Store::StoreEntry - Creates entries for index storage
• Indexing::Store::UpdateIndex - Updates index state
• Indexing::mod::FileIndexer - Main file indexer implementation

VSCode Pattern Reference

Inspired by VSCode’s indexer state creation in src/vs/workbench/services/search/common/

Security Considerations

• Checksums prevent tampering with index data
• Version tracking enables corruption detection
• Path traversal protection applied during validation

Performance Considerations

• Lightweight state creation operations
• Hash calculations are amortized across index operations
• Memory-efficient data structures for large indexes

Error Handling Strategy

State creation operations use result types and propagate errors up with clear messages about what failed during creation or validation.

Thread Safety

State structures are designed to be moved into Arc<RwLock<>> for thread-safe shared access across indexing and search operations.

Structs

FileIndex

File index structure with comprehensive metadata

FileMetadata

File metadata with comprehensive information

SymbolInfo

Symbol information extracted from files for VSCode Outline View

SymbolLocation

Symbol location for cross-referencing

Enums

SymbolKind

Symbol kind for VSCode compatibility

Constants

MAX_FILE_SIZE_BYTES

Maximum file size allowed for indexing (100MB)

Functions

CalculateIndexChecksum

Calculate index checksum for integrity verification

CreateFileMetadata

Create file metadata from raw information

CreateNewIndex

Create a new empty file index

CreateSymbolInfo

Create symbol info with validation

CreateSymbolLocation

Create symbol location for cross-referencing

GenerateIndexVersion

Generate index version string

GetPermissionsString

Get file permissions as string from metadata

ValidateFileSize

Validate file size against maximum allowed

ValidateIndexSize

Check if index size is within sane limits