fixed some migration issues and added generics for update and insert

internal/db/audit.go

@@ -0,0 +1,146 @@
+package db
+
+import (
+	"context"
+	"net/http"
+	"reflect"
+	"strings"
+
+	"github.com/uptrace/bun"
+)
+
+// AuditInfo contains metadata for audit logging
+type AuditInfo struct {
+	Action       string         // e.g., "seasons.create", "users.update"
+	ResourceType string         // e.g., "season", "user"
+	ResourceID   any            // Primary key value (int, string, etc.)
+	Details      map[string]any // Changed fields or additional metadata
+}
+
+// AuditCallback is called after successful database operations to log changes
+type AuditCallback func(ctx context.Context, tx bun.Tx, info *AuditInfo, r *http.Request) error
+
+// extractTableName gets the bun table name from a model type using reflection
+// Example: Season with `bun:"table:seasons,alias:s"` returns "seasons"
+func extractTableName[T any]() string {
+	var model T
+	t := reflect.TypeOf(model)
+
+	// Handle pointer types
+	if t.Kind() == reflect.Ptr {
+		t = t.Elem()
+	}
+
+	// Look for bun.BaseModel field with table tag
+	for i := 0; i < t.NumField(); i++ {
+		field := t.Field(i)
+		if field.Type.Name() == "BaseModel" {
+			bunTag := field.Tag.Get("bun")
+			if bunTag != "" {
+				// Parse tag: "table:seasons,alias:s" -> "seasons"
+				parts := strings.Split(bunTag, ",")
+				for _, part := range parts {
+					if strings.HasPrefix(part, "table:") {
+						return strings.TrimPrefix(part, "table:")
+					}
+				}
+			}
+		}
+	}
+
+	// Fallback: use struct name in lowercase + "s"
+	return strings.ToLower(t.Name()) + "s"
+}
+
+// extractResourceType converts a table name to singular resource type
+// Example: "seasons" -> "season", "users" -> "user"
+func extractResourceType(tableName string) string {
+	// Simple singularization: remove trailing 's'
+	if strings.HasSuffix(tableName, "s") && len(tableName) > 1 {
+		return tableName[:len(tableName)-1]
+	}
+	return tableName
+}
+
+// buildAction creates a permission-style action string
+// Example: ("season", "create") -> "seasons.create"
+func buildAction(resourceType, operation string) string {
+	// Pluralize resource type (simple: add 's')
+	plural := resourceType
+	if !strings.HasSuffix(plural, "s") {
+		plural = plural + "s"
+	}
+	return plural + "." + operation
+}
+
+// extractPrimaryKey uses reflection to find and return the primary key value from a model
+// Returns nil if no primary key is found
+func extractPrimaryKey[T any](model *T) any {
+	if model == nil {
+		return nil
+	}
+
+	v := reflect.ValueOf(model)
+	if v.Kind() == reflect.Ptr {
+		v = v.Elem()
+	}
+
+	t := v.Type()
+	for i := 0; i < t.NumField(); i++ {
+		field := t.Field(i)
+		bunTag := field.Tag.Get("bun")
+		if bunTag != "" && strings.Contains(bunTag, "pk") {
+			// Found primary key field
+			fieldValue := v.Field(i)
+			if fieldValue.IsValid() && fieldValue.CanInterface() {
+				return fieldValue.Interface()
+			}
+		}
+	}
+
+	return nil
+}
+
+// extractChangedFields builds a map of field names to their new values
+// Only includes fields specified in the columns list
+func extractChangedFields[T any](model *T, columns []string) map[string]any {
+	if model == nil || len(columns) == 0 {
+		return nil
+	}
+
+	result := make(map[string]any)
+	v := reflect.ValueOf(model)
+	if v.Kind() == reflect.Ptr {
+		v = v.Elem()
+	}
+
+	t := v.Type()
+
+	// Build map of bun column names to field names
+	columnToField := make(map[string]int)
+	for i := 0; i < t.NumField(); i++ {
+		field := t.Field(i)
+		bunTag := field.Tag.Get("bun")
+		if bunTag != "" {
+			// Parse bun tag to get column name (first part before comma)
+			parts := strings.Split(bunTag, ",")
+			if len(parts) > 0 && parts[0] != "" {
+				columnToField[parts[0]] = i
+			}
+		}
+	}
+
+	// Extract values for requested columns
+	for _, col := range columns {
+		if fieldIdx, ok := columnToField[col]; ok {
+			fieldValue := v.Field(fieldIdx)
+			if fieldValue.IsValid() && fieldValue.CanInterface() {
+				result[col] = fieldValue.Interface()
+			}
+		}
+	}
+
+	return result
+}
+
+// Note: We don't need getTxFromQuery since we store the tx directly in our helper structs