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Oleksandr Bezdieniezhnykh b0fffa6d42 [AZ-284] Autodev baseline + testability refactor

Phase A baseline outputs from /autodev (Steps 1-5):
- Problem & solution docs (_docs/00_problem, _docs/01_solution)
- Codebase documentation (_docs/02_document) incl. architecture,
  module-layout, glossary, system-flows, baseline compliance scan
- Test specs (blackbox, performance, resilience, security, resource,
  traceability matrix)
- Test task decomposition (_docs/02_tasks/todo): AZ-285..AZ-290
- Testability refactor (_docs/04_refactoring/01-testability-refactoring):
  - TC-01 Move DownloadedTileInfoV2 + new ExistingTileInfo to Common.DTO
  - TC-02 Replace dead ISatelliteDownloader API with real signatures
  - TC-03 GoogleMapsDownloaderV2 implements ISatelliteDownloader
  - TC-04 TileService depends on ISatelliteDownloader (mockable)
  - TC-05 DI + endpoints use ISatelliteDownloader
- Test runner scripts (scripts/run-tests.sh, run-performance-tests.sh)
- Autodev state pointer (_docs/_autodev_state.md)

Prepares the codebase for AZ-285..AZ-290 unit/integration test work.

Co-authored-by: Cursor <cursoragent@cursor.com>

2026-05-10 04:44:08 +03:00

2.7 KiB

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Module: Common/Configs

Purpose

Configuration POCOs that bind to appsettings.json sections via IOptions<T> pattern.

Public Interface

MapConfig

Service (string): map provider name (e.g., "GoogleMaps")
ApiKey (string): API key for the map provider

StorageConfig

TilesDirectory (string): base path for tile storage (default: /tiles)
ReadyDirectory (string): base path for output files (default: /ready)
GetTileSubdirectoryPath(int zoomLevel, int tileX, int tileY) → string: computes bucketed subdirectory path ({tiles}/{zoom}/{xBucket}/{yBucket}) using integer division by 1000
GetTileFilePath(int zoomLevel, int tileX, int tileY, string timestamp) → string: computes full file path with timestamped filename (tile_{z}_{x}_{y}_{ts}.jpg)

ProcessingConfig

MaxConcurrentDownloads (int, default: 4): semaphore limit for parallel tile downloads
MaxConcurrentRegions (int, default: 3): parallel region processing workers
DefaultZoomLevel (int, default: 20): fallback zoom level
QueueCapacity (int, default: 100): bounded channel capacity for region request queue
DelayBetweenRequestsMs (int, default: 50): throttle delay between Google Maps requests
SessionTokenReuseCount (int, default: 100): tiles per session token before rotation

DatabaseConfig

ConnectionString (string): DB connection string (unused — connection string is resolved directly from IConfiguration in Program.cs)

Internal Logic

StorageConfig.GetTileSubdirectoryPath buckets tiles by dividing X/Y coordinates by 1000, preventing filesystem performance degradation from too many files in one directory.

Dependencies

None (pure POCOs, no internal imports).

Consumers

Program.cs — binds from config sections via builder.Services.Configure<T>()
GoogleMapsDownloaderV2 — reads MapConfig, StorageConfig, ProcessingConfig via IOptions<T>
RegionService — reads StorageConfig
RegionProcessingService — reads ProcessingConfig
RouteProcessingService — reads StorageConfig
RegionRequestQueue — receives QueueCapacity as constructor param

Data Models

No domain entities; these are configuration DTOs.

Configuration

These classes define the configuration shape consumed by all services.

Config Class	appsettings Section
MapConfig	`MapConfig`
StorageConfig	`StorageConfig`
ProcessingConfig	`ProcessingConfig`
DatabaseConfig	(not wired — connection string read directly)

External Integrations

None.

Security

MapConfig.ApiKey holds the Google Maps API key. In production, injected via environment variable MapConfig__ApiKey.

Tests

No dedicated tests.

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