refactor: remove empty services (#116)

* remove empty services

* remove old factory

* remove old static files

* cleanup more duplicate service code

* file/folder reorg

backend/internal/data/ent/attachment_query.go

@@ -0,0 +1,686 @@
+// Code generated by ent, DO NOT EDIT.
+
+package ent
+
+import (
+	"context"
+	"fmt"
+	"math"
+
+	"entgo.io/ent/dialect/sql"
+	"entgo.io/ent/dialect/sql/sqlgraph"
+	"entgo.io/ent/schema/field"
+	"github.com/google/uuid"
+	"github.com/hay-kot/homebox/backend/internal/data/ent/attachment"
+	"github.com/hay-kot/homebox/backend/internal/data/ent/document"
+	"github.com/hay-kot/homebox/backend/internal/data/ent/item"
+	"github.com/hay-kot/homebox/backend/internal/data/ent/predicate"
+)
+
+// AttachmentQuery is the builder for querying Attachment entities.
+type AttachmentQuery struct {
+	config
+	limit        *int
+	offset       *int
+	unique       *bool
+	order        []OrderFunc
+	fields       []string
+	predicates   []predicate.Attachment
+	withItem     *ItemQuery
+	withDocument *DocumentQuery
+	withFKs      bool
+	// intermediate query (i.e. traversal path).
+	sql  *sql.Selector
+	path func(context.Context) (*sql.Selector, error)
+}
+
+// Where adds a new predicate for the AttachmentQuery builder.
+func (aq *AttachmentQuery) Where(ps ...predicate.Attachment) *AttachmentQuery {
+	aq.predicates = append(aq.predicates, ps...)
+	return aq
+}
+
+// Limit adds a limit step to the query.
+func (aq *AttachmentQuery) Limit(limit int) *AttachmentQuery {
+	aq.limit = &limit
+	return aq
+}
+
+// Offset adds an offset step to the query.
+func (aq *AttachmentQuery) Offset(offset int) *AttachmentQuery {
+	aq.offset = &offset
+	return aq
+}
+
+// Unique configures the query builder to filter duplicate records on query.
+// By default, unique is set to true, and can be disabled using this method.
+func (aq *AttachmentQuery) Unique(unique bool) *AttachmentQuery {
+	aq.unique = &unique
+	return aq
+}
+
+// Order adds an order step to the query.
+func (aq *AttachmentQuery) Order(o ...OrderFunc) *AttachmentQuery {
+	aq.order = append(aq.order, o...)
+	return aq
+}
+
+// QueryItem chains the current query on the "item" edge.
+func (aq *AttachmentQuery) QueryItem() *ItemQuery {
+	query := &ItemQuery{config: aq.config}
+	query.path = func(ctx context.Context) (fromU *sql.Selector, err error) {
+		if err := aq.prepareQuery(ctx); err != nil {
+			return nil, err
+		}
+		selector := aq.sqlQuery(ctx)
+		if err := selector.Err(); err != nil {
+			return nil, err
+		}
+		step := sqlgraph.NewStep(
+			sqlgraph.From(attachment.Table, attachment.FieldID, selector),
+			sqlgraph.To(item.Table, item.FieldID),
+			sqlgraph.Edge(sqlgraph.M2O, true, attachment.ItemTable, attachment.ItemColumn),
+		)
+		fromU = sqlgraph.SetNeighbors(aq.driver.Dialect(), step)
+		return fromU, nil
+	}
+	return query
+}
+
+// QueryDocument chains the current query on the "document" edge.
+func (aq *AttachmentQuery) QueryDocument() *DocumentQuery {
+	query := &DocumentQuery{config: aq.config}
+	query.path = func(ctx context.Context) (fromU *sql.Selector, err error) {
+		if err := aq.prepareQuery(ctx); err != nil {
+			return nil, err
+		}
+		selector := aq.sqlQuery(ctx)
+		if err := selector.Err(); err != nil {
+			return nil, err
+		}
+		step := sqlgraph.NewStep(
+			sqlgraph.From(attachment.Table, attachment.FieldID, selector),
+			sqlgraph.To(document.Table, document.FieldID),
+			sqlgraph.Edge(sqlgraph.M2O, true, attachment.DocumentTable, attachment.DocumentColumn),
+		)
+		fromU = sqlgraph.SetNeighbors(aq.driver.Dialect(), step)
+		return fromU, nil
+	}
+	return query
+}
+
+// First returns the first Attachment entity from the query.
+// Returns a *NotFoundError when no Attachment was found.
+func (aq *AttachmentQuery) First(ctx context.Context) (*Attachment, error) {
+	nodes, err := aq.Limit(1).All(ctx)
+	if err != nil {
+		return nil, err
+	}
+	if len(nodes) == 0 {
+		return nil, &NotFoundError{attachment.Label}
+	}
+	return nodes[0], nil
+}
+
+// FirstX is like First, but panics if an error occurs.
+func (aq *AttachmentQuery) FirstX(ctx context.Context) *Attachment {
+	node, err := aq.First(ctx)
+	if err != nil && !IsNotFound(err) {
+		panic(err)
+	}
+	return node
+}
+
+// FirstID returns the first Attachment ID from the query.
+// Returns a *NotFoundError when no Attachment ID was found.
+func (aq *AttachmentQuery) FirstID(ctx context.Context) (id uuid.UUID, err error) {
+	var ids []uuid.UUID
+	if ids, err = aq.Limit(1).IDs(ctx); err != nil {
+		return
+	}
+	if len(ids) == 0 {
+		err = &NotFoundError{attachment.Label}
+		return
+	}
+	return ids[0], nil
+}
+
+// FirstIDX is like FirstID, but panics if an error occurs.
+func (aq *AttachmentQuery) FirstIDX(ctx context.Context) uuid.UUID {
+	id, err := aq.FirstID(ctx)
+	if err != nil && !IsNotFound(err) {
+		panic(err)
+	}
+	return id
+}
+
+// Only returns a single Attachment entity found by the query, ensuring it only returns one.
+// Returns a *NotSingularError when more than one Attachment entity is found.
+// Returns a *NotFoundError when no Attachment entities are found.
+func (aq *AttachmentQuery) Only(ctx context.Context) (*Attachment, error) {
+	nodes, err := aq.Limit(2).All(ctx)
+	if err != nil {
+		return nil, err
+	}
+	switch len(nodes) {
+	case 1:
+		return nodes[0], nil
+	case 0:
+		return nil, &NotFoundError{attachment.Label}
+	default:
+		return nil, &NotSingularError{attachment.Label}
+	}
+}
+
+// OnlyX is like Only, but panics if an error occurs.
+func (aq *AttachmentQuery) OnlyX(ctx context.Context) *Attachment {
+	node, err := aq.Only(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return node
+}
+
+// OnlyID is like Only, but returns the only Attachment ID in the query.
+// Returns a *NotSingularError when more than one Attachment ID is found.
+// Returns a *NotFoundError when no entities are found.
+func (aq *AttachmentQuery) OnlyID(ctx context.Context) (id uuid.UUID, err error) {
+	var ids []uuid.UUID
+	if ids, err = aq.Limit(2).IDs(ctx); err != nil {
+		return
+	}
+	switch len(ids) {
+	case 1:
+		id = ids[0]
+	case 0:
+		err = &NotFoundError{attachment.Label}
+	default:
+		err = &NotSingularError{attachment.Label}
+	}
+	return
+}
+
+// OnlyIDX is like OnlyID, but panics if an error occurs.
+func (aq *AttachmentQuery) OnlyIDX(ctx context.Context) uuid.UUID {
+	id, err := aq.OnlyID(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return id
+}
+
+// All executes the query and returns a list of Attachments.
+func (aq *AttachmentQuery) All(ctx context.Context) ([]*Attachment, error) {
+	if err := aq.prepareQuery(ctx); err != nil {
+		return nil, err
+	}
+	return aq.sqlAll(ctx)
+}
+
+// AllX is like All, but panics if an error occurs.
+func (aq *AttachmentQuery) AllX(ctx context.Context) []*Attachment {
+	nodes, err := aq.All(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return nodes
+}
+
+// IDs executes the query and returns a list of Attachment IDs.
+func (aq *AttachmentQuery) IDs(ctx context.Context) ([]uuid.UUID, error) {
+	var ids []uuid.UUID
+	if err := aq.Select(attachment.FieldID).Scan(ctx, &ids); err != nil {
+		return nil, err
+	}
+	return ids, nil
+}
+
+// IDsX is like IDs, but panics if an error occurs.
+func (aq *AttachmentQuery) IDsX(ctx context.Context) []uuid.UUID {
+	ids, err := aq.IDs(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return ids
+}
+
+// Count returns the count of the given query.
+func (aq *AttachmentQuery) Count(ctx context.Context) (int, error) {
+	if err := aq.prepareQuery(ctx); err != nil {
+		return 0, err
+	}
+	return aq.sqlCount(ctx)
+}
+
+// CountX is like Count, but panics if an error occurs.
+func (aq *AttachmentQuery) CountX(ctx context.Context) int {
+	count, err := aq.Count(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return count
+}
+
+// Exist returns true if the query has elements in the graph.
+func (aq *AttachmentQuery) Exist(ctx context.Context) (bool, error) {
+	if err := aq.prepareQuery(ctx); err != nil {
+		return false, err
+	}
+	return aq.sqlExist(ctx)
+}
+
+// ExistX is like Exist, but panics if an error occurs.
+func (aq *AttachmentQuery) ExistX(ctx context.Context) bool {
+	exist, err := aq.Exist(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return exist
+}
+
+// Clone returns a duplicate of the AttachmentQuery builder, including all associated steps. It can be
+// used to prepare common query builders and use them differently after the clone is made.
+func (aq *AttachmentQuery) Clone() *AttachmentQuery {
+	if aq == nil {
+		return nil
+	}
+	return &AttachmentQuery{
+		config:       aq.config,
+		limit:        aq.limit,
+		offset:       aq.offset,
+		order:        append([]OrderFunc{}, aq.order...),
+		predicates:   append([]predicate.Attachment{}, aq.predicates...),
+		withItem:     aq.withItem.Clone(),
+		withDocument: aq.withDocument.Clone(),
+		// clone intermediate query.
+		sql:    aq.sql.Clone(),
+		path:   aq.path,
+		unique: aq.unique,
+	}
+}
+
+// WithItem tells the query-builder to eager-load the nodes that are connected to
+// the "item" edge. The optional arguments are used to configure the query builder of the edge.
+func (aq *AttachmentQuery) WithItem(opts ...func(*ItemQuery)) *AttachmentQuery {
+	query := &ItemQuery{config: aq.config}
+	for _, opt := range opts {
+		opt(query)
+	}
+	aq.withItem = query
+	return aq
+}
+
+// WithDocument tells the query-builder to eager-load the nodes that are connected to
+// the "document" edge. The optional arguments are used to configure the query builder of the edge.
+func (aq *AttachmentQuery) WithDocument(opts ...func(*DocumentQuery)) *AttachmentQuery {
+	query := &DocumentQuery{config: aq.config}
+	for _, opt := range opts {
+		opt(query)
+	}
+	aq.withDocument = query
+	return aq
+}
+
+// GroupBy is used to group vertices by one or more fields/columns.
+// It is often used with aggregate functions, like: count, max, mean, min, sum.
+//
+// Example:
+//
+//	var v []struct {
+//		CreatedAt time.Time `json:"created_at,omitempty"`
+//		Count int `json:"count,omitempty"`
+//	}
+//
+//	client.Attachment.Query().
+//		GroupBy(attachment.FieldCreatedAt).
+//		Aggregate(ent.Count()).
+//		Scan(ctx, &v)
+func (aq *AttachmentQuery) GroupBy(field string, fields ...string) *AttachmentGroupBy {
+	grbuild := &AttachmentGroupBy{config: aq.config}
+	grbuild.fields = append([]string{field}, fields...)
+	grbuild.path = func(ctx context.Context) (prev *sql.Selector, err error) {
+		if err := aq.prepareQuery(ctx); err != nil {
+			return nil, err
+		}
+		return aq.sqlQuery(ctx), nil
+	}
+	grbuild.label = attachment.Label
+	grbuild.flds, grbuild.scan = &grbuild.fields, grbuild.Scan
+	return grbuild
+}
+
+// Select allows the selection one or more fields/columns for the given query,
+// instead of selecting all fields in the entity.
+//
+// Example:
+//
+//	var v []struct {
+//		CreatedAt time.Time `json:"created_at,omitempty"`
+//	}
+//
+//	client.Attachment.Query().
+//		Select(attachment.FieldCreatedAt).
+//		Scan(ctx, &v)
+func (aq *AttachmentQuery) Select(fields ...string) *AttachmentSelect {
+	aq.fields = append(aq.fields, fields...)
+	selbuild := &AttachmentSelect{AttachmentQuery: aq}
+	selbuild.label = attachment.Label
+	selbuild.flds, selbuild.scan = &aq.fields, selbuild.Scan
+	return selbuild
+}
+
+func (aq *AttachmentQuery) prepareQuery(ctx context.Context) error {
+	for _, f := range aq.fields {
+		if !attachment.ValidColumn(f) {
+			return &ValidationError{Name: f, err: fmt.Errorf("ent: invalid field %q for query", f)}
+		}
+	}
+	if aq.path != nil {
+		prev, err := aq.path(ctx)
+		if err != nil {
+			return err
+		}
+		aq.sql = prev
+	}
+	return nil
+}
+
+func (aq *AttachmentQuery) sqlAll(ctx context.Context, hooks ...queryHook) ([]*Attachment, error) {
+	var (
+		nodes       = []*Attachment{}
+		withFKs     = aq.withFKs
+		_spec       = aq.querySpec()
+		loadedTypes = [2]bool{
+			aq.withItem != nil,
+			aq.withDocument != nil,
+		}
+	)
+	if aq.withItem != nil || aq.withDocument != nil {
+		withFKs = true
+	}
+	if withFKs {
+		_spec.Node.Columns = append(_spec.Node.Columns, attachment.ForeignKeys...)
+	}
+	_spec.ScanValues = func(columns []string) ([]any, error) {
+		return (*Attachment).scanValues(nil, columns)
+	}
+	_spec.Assign = func(columns []string, values []any) error {
+		node := &Attachment{config: aq.config}
+		nodes = append(nodes, node)
+		node.Edges.loadedTypes = loadedTypes
+		return node.assignValues(columns, values)
+	}
+	for i := range hooks {
+		hooks[i](ctx, _spec)
+	}
+	if err := sqlgraph.QueryNodes(ctx, aq.driver, _spec); err != nil {
+		return nil, err
+	}
+	if len(nodes) == 0 {
+		return nodes, nil
+	}
+	if query := aq.withItem; query != nil {
+		if err := aq.loadItem(ctx, query, nodes, nil,
+			func(n *Attachment, e *Item) { n.Edges.Item = e }); err != nil {
+			return nil, err
+		}
+	}
+	if query := aq.withDocument; query != nil {
+		if err := aq.loadDocument(ctx, query, nodes, nil,
+			func(n *Attachment, e *Document) { n.Edges.Document = e }); err != nil {
+			return nil, err
+		}
+	}
+	return nodes, nil
+}
+
+func (aq *AttachmentQuery) loadItem(ctx context.Context, query *ItemQuery, nodes []*Attachment, init func(*Attachment), assign func(*Attachment, *Item)) error {
+	ids := make([]uuid.UUID, 0, len(nodes))
+	nodeids := make(map[uuid.UUID][]*Attachment)
+	for i := range nodes {
+		if nodes[i].item_attachments == nil {
+			continue
+		}
+		fk := *nodes[i].item_attachments
+		if _, ok := nodeids[fk]; !ok {
+			ids = append(ids, fk)
+		}
+		nodeids[fk] = append(nodeids[fk], nodes[i])
+	}
+	query.Where(item.IDIn(ids...))
+	neighbors, err := query.All(ctx)
+	if err != nil {
+		return err
+	}
+	for _, n := range neighbors {
+		nodes, ok := nodeids[n.ID]
+		if !ok {
+			return fmt.Errorf(`unexpected foreign-key "item_attachments" returned %v`, n.ID)
+		}
+		for i := range nodes {
+			assign(nodes[i], n)
+		}
+	}
+	return nil
+}
+func (aq *AttachmentQuery) loadDocument(ctx context.Context, query *DocumentQuery, nodes []*Attachment, init func(*Attachment), assign func(*Attachment, *Document)) error {
+	ids := make([]uuid.UUID, 0, len(nodes))
+	nodeids := make(map[uuid.UUID][]*Attachment)
+	for i := range nodes {
+		if nodes[i].document_attachments == nil {
+			continue
+		}
+		fk := *nodes[i].document_attachments
+		if _, ok := nodeids[fk]; !ok {
+			ids = append(ids, fk)
+		}
+		nodeids[fk] = append(nodeids[fk], nodes[i])
+	}
+	query.Where(document.IDIn(ids...))
+	neighbors, err := query.All(ctx)
+	if err != nil {
+		return err
+	}
+	for _, n := range neighbors {
+		nodes, ok := nodeids[n.ID]
+		if !ok {
+			return fmt.Errorf(`unexpected foreign-key "document_attachments" returned %v`, n.ID)
+		}
+		for i := range nodes {
+			assign(nodes[i], n)
+		}
+	}
+	return nil
+}
+
+func (aq *AttachmentQuery) sqlCount(ctx context.Context) (int, error) {
+	_spec := aq.querySpec()
+	_spec.Node.Columns = aq.fields
+	if len(aq.fields) > 0 {
+		_spec.Unique = aq.unique != nil && *aq.unique
+	}
+	return sqlgraph.CountNodes(ctx, aq.driver, _spec)
+}
+
+func (aq *AttachmentQuery) sqlExist(ctx context.Context) (bool, error) {
+	switch _, err := aq.FirstID(ctx); {
+	case IsNotFound(err):
+		return false, nil
+	case err != nil:
+		return false, fmt.Errorf("ent: check existence: %w", err)
+	default:
+		return true, nil
+	}
+}
+
+func (aq *AttachmentQuery) querySpec() *sqlgraph.QuerySpec {
+	_spec := &sqlgraph.QuerySpec{
+		Node: &sqlgraph.NodeSpec{
+			Table:   attachment.Table,
+			Columns: attachment.Columns,
+			ID: &sqlgraph.FieldSpec{
+				Type:   field.TypeUUID,
+				Column: attachment.FieldID,
+			},
+		},
+		From:   aq.sql,
+		Unique: true,
+	}
+	if unique := aq.unique; unique != nil {
+		_spec.Unique = *unique
+	}
+	if fields := aq.fields; len(fields) > 0 {
+		_spec.Node.Columns = make([]string, 0, len(fields))
+		_spec.Node.Columns = append(_spec.Node.Columns, attachment.FieldID)
+		for i := range fields {
+			if fields[i] != attachment.FieldID {
+				_spec.Node.Columns = append(_spec.Node.Columns, fields[i])
+			}
+		}
+	}
+	if ps := aq.predicates; len(ps) > 0 {
+		_spec.Predicate = func(selector *sql.Selector) {
+			for i := range ps {
+				ps[i](selector)
+			}
+		}
+	}
+	if limit := aq.limit; limit != nil {
+		_spec.Limit = *limit
+	}
+	if offset := aq.offset; offset != nil {
+		_spec.Offset = *offset
+	}
+	if ps := aq.order; len(ps) > 0 {
+		_spec.Order = func(selector *sql.Selector) {
+			for i := range ps {
+				ps[i](selector)
+			}
+		}
+	}
+	return _spec
+}
+
+func (aq *AttachmentQuery) sqlQuery(ctx context.Context) *sql.Selector {
+	builder := sql.Dialect(aq.driver.Dialect())
+	t1 := builder.Table(attachment.Table)
+	columns := aq.fields
+	if len(columns) == 0 {
+		columns = attachment.Columns
+	}
+	selector := builder.Select(t1.Columns(columns...)...).From(t1)
+	if aq.sql != nil {
+		selector = aq.sql
+		selector.Select(selector.Columns(columns...)...)
+	}
+	if aq.unique != nil && *aq.unique {
+		selector.Distinct()
+	}
+	for _, p := range aq.predicates {
+		p(selector)
+	}
+	for _, p := range aq.order {
+		p(selector)
+	}
+	if offset := aq.offset; offset != nil {
+		// limit is mandatory for offset clause. We start
+		// with default value, and override it below if needed.
+		selector.Offset(*offset).Limit(math.MaxInt32)
+	}
+	if limit := aq.limit; limit != nil {
+		selector.Limit(*limit)
+	}
+	return selector
+}
+
+// AttachmentGroupBy is the group-by builder for Attachment entities.
+type AttachmentGroupBy struct {
+	config
+	selector
+	fields []string
+	fns    []AggregateFunc
+	// intermediate query (i.e. traversal path).
+	sql  *sql.Selector
+	path func(context.Context) (*sql.Selector, error)
+}
+
+// Aggregate adds the given aggregation functions to the group-by query.
+func (agb *AttachmentGroupBy) Aggregate(fns ...AggregateFunc) *AttachmentGroupBy {
+	agb.fns = append(agb.fns, fns...)
+	return agb
+}
+
+// Scan applies the group-by query and scans the result into the given value.
+func (agb *AttachmentGroupBy) Scan(ctx context.Context, v any) error {
+	query, err := agb.path(ctx)
+	if err != nil {
+		return err
+	}
+	agb.sql = query
+	return agb.sqlScan(ctx, v)
+}
+
+func (agb *AttachmentGroupBy) sqlScan(ctx context.Context, v any) error {
+	for _, f := range agb.fields {
+		if !attachment.ValidColumn(f) {
+			return &ValidationError{Name: f, err: fmt.Errorf("invalid field %q for group-by", f)}
+		}
+	}
+	selector := agb.sqlQuery()
+	if err := selector.Err(); err != nil {
+		return err
+	}
+	rows := &sql.Rows{}
+	query, args := selector.Query()
+	if err := agb.driver.Query(ctx, query, args, rows); err != nil {
+		return err
+	}
+	defer rows.Close()
+	return sql.ScanSlice(rows, v)
+}
+
+func (agb *AttachmentGroupBy) sqlQuery() *sql.Selector {
+	selector := agb.sql.Select()
+	aggregation := make([]string, 0, len(agb.fns))
+	for _, fn := range agb.fns {
+		aggregation = append(aggregation, fn(selector))
+	}
+	// If no columns were selected in a custom aggregation function, the default
+	// selection is the fields used for "group-by", and the aggregation functions.
+	if len(selector.SelectedColumns()) == 0 {
+		columns := make([]string, 0, len(agb.fields)+len(agb.fns))
+		for _, f := range agb.fields {
+			columns = append(columns, selector.C(f))
+		}
+		columns = append(columns, aggregation...)
+		selector.Select(columns...)
+	}
+	return selector.GroupBy(selector.Columns(agb.fields...)...)
+}
+
+// AttachmentSelect is the builder for selecting fields of Attachment entities.
+type AttachmentSelect struct {
+	*AttachmentQuery
+	selector
+	// intermediate query (i.e. traversal path).
+	sql *sql.Selector
+}
+
+// Scan applies the selector query and scans the result into the given value.
+func (as *AttachmentSelect) Scan(ctx context.Context, v any) error {
+	if err := as.prepareQuery(ctx); err != nil {
+		return err
+	}
+	as.sql = as.AttachmentQuery.sqlQuery(ctx)
+	return as.sqlScan(ctx, v)
+}
+
+func (as *AttachmentSelect) sqlScan(ctx context.Context, v any) error {
+	rows := &sql.Rows{}
+	query, args := as.sql.Query()
+	if err := as.driver.Query(ctx, query, args, rows); err != nil {
+		return err
+	}
+	defer rows.Close()
+	return sql.ScanSlice(rows, v)
+}