Organize backend into product executable and shared Go modules

backend/shared/database/internal/builder/query.go

@@ -0,0 +1,162 @@
+package builderimp
+
+import (
+	"reflect"
+
+	"git.sendico.io/tech/sxchnge/shared/database/record"
+	"git.sendico.io/tech/sxchnge/shared/database/repository/builder"
+	"go.mongodb.org/mongo-driver/v2/bson"
+	"go.mongodb.org/mongo-driver/v2/mongo/options"
+)
+
+type QueryImp struct {
+	filter bson.D
+	sort   bson.D
+	limit  *int64
+	offset *int64
+}
+
+func (b *QueryImp) Filter(field builder.Field, value any) builder.Query {
+	b.filter = append(b.filter, bson.E{Key: field.Build(), Value: value})
+	return b
+}
+
+func (b *QueryImp) And(filters ...builder.Query) builder.Query {
+	andFilters := bson.A{}
+	for _, f := range filters {
+		andFilters = append(andFilters, f.BuildQuery())
+	}
+	b.filter = append(b.filter, bson.E{Key: string(builder.And), Value: andFilters})
+	return b
+}
+
+func (b *QueryImp) Or(filters ...builder.Query) builder.Query {
+	orFilters := bson.A{}
+	for _, f := range filters {
+		orFilters = append(orFilters, f.BuildQuery())
+	}
+	b.filter = append(b.filter, bson.E{Key: string(builder.Or), Value: orFilters})
+	return b
+}
+
+func (b *QueryImp) Comparison(field builder.Field, operator builder.MongoOperation, value any) builder.Query {
+	b.filter = append(b.filter, bson.E{Key: field.Build(), Value: bson.M{string(operator): value}})
+	return b
+}
+
+func (b *QueryImp) Expression(value builder.Expression) builder.Query {
+	b.filter = append(b.filter, bson.E{Key: string(builder.Expr), Value: value.Build()})
+	return b
+}
+
+func (b *QueryImp) RegEx(field builder.Field, pattern, options string) builder.Query {
+	b.filter = append(b.filter, bson.E{Key: field.Build(), Value: bson.Regex{Pattern: pattern, Options: options}})
+	return b
+}
+
+func (b *QueryImp) opIn(field builder.Field, op builder.MongoOperation, values ...any) builder.Query {
+	// Mongo requires $in and $nin operands to be arrays. Keep an empty input as
+	// a non-nil slice so the BSON encoder emits [] instead of null.
+	flattenedValues := make([]any, 0, len(values))
+
+	for _, v := range values {
+		valueType := reflect.TypeOf(v)
+		if valueType == nil {
+			flattenedValues = append(flattenedValues, nil)
+			continue
+		}
+		switch valueType.Kind() {
+		case reflect.Slice:
+			slice := reflect.ValueOf(v)
+			for i := range slice.Len() {
+				flattenedValues = append(flattenedValues, slice.Index(i).Interface())
+			}
+		default:
+			flattenedValues = append(flattenedValues, v)
+		}
+	}
+
+	b.filter = append(b.filter, bson.E{Key: field.Build(), Value: bson.M{string(op): flattenedValues}})
+	return b
+}
+
+func (b *QueryImp) NotIn(field builder.Field, values ...any) builder.Query {
+	return b.opIn(field, builder.NotIn, values...)
+}
+
+func (b *QueryImp) In(field builder.Field, values ...any) builder.Query {
+	return b.opIn(field, builder.In, values...)
+}
+
+func (b *QueryImp) Archived(isArchived *bool) builder.Query {
+	if isArchived == nil {
+		return b
+	}
+	return b.And(NewQueryImp().Filter(NewFieldImp(storable.IsArchivedField), *isArchived))
+}
+
+func (b *QueryImp) Sort(field builder.Field, ascending bool) builder.Query {
+	order := 1
+	if !ascending {
+		order = -1
+	}
+	b.sort = append(b.sort, bson.E{Key: field.Build(), Value: order})
+	return b
+}
+
+func (b *QueryImp) BuildPipeline() bson.D {
+	query := bson.D{}
+
+	if len(b.filter) > 0 {
+		query = append(query, bson.E{Key: string(builder.Match), Value: b.filter})
+	}
+
+	if len(b.sort) > 0 {
+		query = append(query, bson.E{Key: string(builder.Sort), Value: b.sort})
+	}
+
+	if b.limit != nil {
+		query = append(query, bson.E{Key: string(builder.Limit), Value: *b.limit})
+	}
+
+	if b.offset != nil {
+		query = append(query, bson.E{Key: string(builder.Skip), Value: *b.offset})
+	}
+
+	return query
+}
+
+func (b *QueryImp) BuildQuery() bson.D {
+	return b.filter
+}
+
+func (b *QueryImp) Limit(limit *int64) builder.Query {
+	b.limit = limit
+	return b
+}
+
+func (b *QueryImp) Offset(offset *int64) builder.Query {
+	b.offset = offset
+	return b
+}
+
+func (b *QueryImp) BuildOptions() *options.FindOptionsBuilder {
+	opts := options.Find()
+	if b.limit != nil {
+		opts.SetLimit(*b.limit)
+	}
+	if b.offset != nil {
+		opts.SetSkip(*b.offset)
+	}
+	if len(b.sort) > 0 {
+		opts.SetSort(b.sort)
+	}
+	return opts
+}
+
+func NewQueryImp() builder.Query {
+	return &QueryImp{
+		filter: bson.D{},
+		sort:   bson.D{},
+	}
+}