add interface types

backend/internal/interfaces/types.go

@@ -0,0 +1,61 @@
+package interfaces
+
+import (
+	"github.com/jackc/pgx/v5/pgxpool"
+	"github.com/labstack/echo/v4"
+
+	"KonferCA/SPUR/db"
+	"KonferCA/SPUR/internal/middleware"
+	"KonferCA/SPUR/storage"
+)
+
+/*
+CoreServer defines the complete set of capabilities required by API versions.
+This interface is implemented by the main server struct and provides access
+to all core services and dependencies needed across the application.
+
+Usage:
+  - Implemented by the main server struct
+  - Used by API versioned packages to access core functionality
+  - Provides complete access to all server capabilities
+
+Example:
+
+	func SetupRoutes(e *echo.Group, s CoreServer) {
+	    // Use s.GetQueries() for database access
+	    // Use s.GetStorage() for file operations
+	    // etc.
+	}
+*/
+type CoreServer interface {
+	GetDB() *pgxpool.Pool
+	GetQueries() *db.Queries
+	GetStorage() *storage.Storage
+	GetAuthLimiter() *middleware.RateLimiter
+	GetAPILimiter() *middleware.RateLimiter
+	GetEcho() *echo.Echo
+}
+
+/*
+HandlerDependencies defines a minimal interface for individual handlers.
+This interface provides only the essential services needed for most handlers,
+reducing coupling and making handlers easier to test.
+
+Usage:
+  - Used by individual route handlers
+  - Provides minimal required dependencies
+  - Makes handlers more testable with minimal mocking
+
+Example:
+
+	func (h *Handler) HandleCreateUser(deps HandlerDependencies) echo.HandlerFunc {
+	    return func(c echo.Context) error {
+	        // Use deps.GetQueries() for database operations
+	        // Use deps.GetStorage() for file operations
+	    }
+	}
+*/
+type HandlerDependencies interface {
+	GetQueries() *db.Queries
+	GetStorage() *storage.Storage
+}