48 lines
1.7 KiB
Go
48 lines
1.7 KiB
Go
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package city
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import (
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"bill-go-fiber/internal/user"
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"context"
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)
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// Represents 'cities' object.
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type City struct {
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ID int `json:"id"`
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Name string `json:"name"`
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Created int64 `json:"created"`
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Modified int64 `json:"modified"`
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User int `json:"user"`
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}
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// Represents our 1-to-many relationship, User to Cities.
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// In other words, a single user can have many cities.
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// This is used for the presentation layer only.
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type CityAndUser struct {
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ID int `json:"id"`
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Name string `json:"name"`
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Created int64 `json:"created"`
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Modified int64 `json:"modified"`
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User user.User `json:"user"`
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}
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// Our repository will implement these methods.
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type CityRepository interface {
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GetCities(ctx context.Context) (*[]CityAndUser, error)
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GetCity(ctx context.Context, cityID int) (*CityAndUser, error)
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CreateCity(ctx context.Context, city *City) error
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UpdateCity(ctx context.Context, cityID int, city *City) error
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DeleteCity(ctx context.Context, cityID int) error
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}
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// Our use-case or service will implement these methods.
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// Method names does not matter - I intentionally changed the names here so they are different from the repository.
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// Usually, 'services' should be as close as possible to a business use-case / problem.
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// Some methods will also take 'userID' as an argument - because we need it to fill the 'User' value in the struct.
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type CityService interface {
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FetchCities(ctx context.Context) (*[]CityAndUser, error)
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FetchCity(ctx context.Context, cityID int) (*CityAndUser, error)
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BuildCity(ctx context.Context, city *City, userID int) error
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ModifyCity(ctx context.Context, cityID int, city *City, userID int) error
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DestroyCity(ctx context.Context, cityID int) error
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}
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