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https://github.com/SamyRai/tercul-backend.git
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4957117cb6
- Core Go application with GraphQL API using gqlgen - Comprehensive data models for literary works, authors, translations - Repository pattern with caching layer - Authentication and authorization system - Linguistics analysis capabilities with multiple adapters - Vector search integration with Weaviate - Docker containerization support - Python data migration and analysis scripts - Clean architecture with proper separation of concerns - Production-ready configuration and middleware - Proper .gitignore excluding vendor/, database files, and build artifacts
79 lines
2.7 KiB
Go
79 lines
2.7 KiB
Go
package repositories
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import (
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"context"
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"gorm.io/gorm"
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"math"
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"tercul/models"
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)
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// PlaceRepository defines CRUD methods specific to Place.
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type PlaceRepository interface {
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BaseRepository[models.Place]
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ListByCountryID(ctx context.Context, countryID uint) ([]models.Place, error)
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ListByCityID(ctx context.Context, cityID uint) ([]models.Place, error)
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FindNearby(ctx context.Context, latitude, longitude float64, radiusKm float64) ([]models.Place, error)
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}
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type placeRepository struct {
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BaseRepository[models.Place]
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db *gorm.DB
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}
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// NewPlaceRepository creates a new PlaceRepository.
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func NewPlaceRepository(db *gorm.DB) PlaceRepository {
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return &placeRepository{
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BaseRepository: NewBaseRepositoryImpl[models.Place](db),
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db: db,
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}
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}
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// ListByCountryID finds places by country ID
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func (r *placeRepository) ListByCountryID(ctx context.Context, countryID uint) ([]models.Place, error) {
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var places []models.Place
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if err := r.db.WithContext(ctx).Where("country_id = ?", countryID).Find(&places).Error; err != nil {
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return nil, err
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}
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return places, nil
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}
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// ListByCityID finds places by city ID
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func (r *placeRepository) ListByCityID(ctx context.Context, cityID uint) ([]models.Place, error) {
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var places []models.Place
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if err := r.db.WithContext(ctx).Where("city_id = ?", cityID).Find(&places).Error; err != nil {
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return nil, err
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}
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return places, nil
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}
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// FindNearby finds places within a certain radius (in kilometers) of a point
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func (r *placeRepository) FindNearby(ctx context.Context, latitude, longitude float64, radiusKm float64) ([]models.Place, error) {
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// This is a simplified implementation that would need to be replaced with
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// a proper geospatial query based on the database being used
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var places []models.Place
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// For PostgreSQL with PostGIS, you might use something like:
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// query := `SELECT * FROM places
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// WHERE ST_DWithin(
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// ST_MakePoint(longitude, latitude)::geography,
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// ST_MakePoint(?, ?)::geography,
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// ? * 1000)`
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// if err := r.db.WithContext(ctx).Raw(query, longitude, latitude, radiusKm).Scan(&places).Error; err != nil {
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// return nil, err
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// }
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// For a simple approximation without geospatial extensions:
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// This is not accurate for large distances or near the poles
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latDelta := radiusKm / 111.0 // Approx. 111km per degree of latitude
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lonDelta := radiusKm / (111.0 * math.Cos(latitude*(math.Pi/180.0))) // Adjust for longitude
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if err := r.db.WithContext(ctx).Where("latitude BETWEEN ? AND ? AND longitude BETWEEN ? AND ?",
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latitude-latDelta, latitude+latDelta,
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longitude-lonDelta, longitude+lonDelta).
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Find(&places).Error; err != nil {
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return nil, err
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}
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return places, nil
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}
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