mirror of
https://github.com/usememos/memos.git
synced 2024-09-20 22:46:16 +08:00
357 lines
7.9 KiB
Go
357 lines
7.9 KiB
Go
package store
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import (
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"context"
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"database/sql"
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"fmt"
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"sort"
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"strings"
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"github.com/usememos/memos/api"
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"github.com/usememos/memos/common"
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)
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// resourceRaw is the store model for an Resource.
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// Fields have exactly the same meanings as Resource.
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type resourceRaw struct {
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ID int
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// Standard fields
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CreatorID int
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CreatedTs int64
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UpdatedTs int64
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// Domain specific fields
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Filename string
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Blob []byte
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ExternalLink string
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Type string
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Size int64
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}
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func (raw *resourceRaw) toResource() *api.Resource {
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return &api.Resource{
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ID: raw.ID,
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// Standard fields
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CreatorID: raw.CreatorID,
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CreatedTs: raw.CreatedTs,
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UpdatedTs: raw.UpdatedTs,
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// Domain specific fields
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Filename: raw.Filename,
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Blob: raw.Blob,
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ExternalLink: raw.ExternalLink,
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Type: raw.Type,
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Size: raw.Size,
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}
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}
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func (s *Store) ComposeMemoResourceList(ctx context.Context, memo *api.Memo) error {
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resourceList, err := s.FindResourceList(ctx, &api.ResourceFind{
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MemoID: &memo.ID,
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})
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if err != nil {
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return err
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}
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for _, resource := range resourceList {
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memoResource, err := s.FindMemoResource(ctx, &api.MemoResourceFind{
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MemoID: &memo.ID,
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ResourceID: &resource.ID,
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})
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if err != nil {
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return err
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}
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resource.CreatedTs = memoResource.CreatedTs
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resource.UpdatedTs = memoResource.UpdatedTs
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}
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sort.Slice(resourceList, func(i, j int) bool {
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if resourceList[i].CreatedTs != resourceList[j].CreatedTs {
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return resourceList[i].CreatedTs < resourceList[j].CreatedTs
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}
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return resourceList[i].ID < resourceList[j].ID
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})
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memo.ResourceList = resourceList
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return nil
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}
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func (s *Store) CreateResource(ctx context.Context, create *api.ResourceCreate) (*api.Resource, error) {
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tx, err := s.db.BeginTx(ctx, nil)
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if err != nil {
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return nil, FormatError(err)
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}
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defer tx.Rollback()
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resourceRaw, err := createResource(ctx, tx, create)
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if err != nil {
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return nil, err
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}
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if err := tx.Commit(); err != nil {
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return nil, FormatError(err)
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}
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resource := resourceRaw.toResource()
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return resource, nil
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}
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func (s *Store) FindResourceList(ctx context.Context, find *api.ResourceFind) ([]*api.Resource, error) {
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tx, err := s.db.BeginTx(ctx, nil)
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if err != nil {
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return nil, FormatError(err)
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}
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defer tx.Rollback()
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resourceRawList, err := findResourceList(ctx, tx, find)
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if err != nil {
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return nil, err
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}
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resourceList := []*api.Resource{}
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for _, raw := range resourceRawList {
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resourceList = append(resourceList, raw.toResource())
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}
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return resourceList, nil
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}
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func (s *Store) FindResource(ctx context.Context, find *api.ResourceFind) (*api.Resource, error) {
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tx, err := s.db.BeginTx(ctx, nil)
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if err != nil {
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return nil, FormatError(err)
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}
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defer tx.Rollback()
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list, err := findResourceList(ctx, tx, find)
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if err != nil {
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return nil, err
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}
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if len(list) == 0 {
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return nil, &common.Error{Code: common.NotFound, Err: fmt.Errorf("not found")}
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}
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resourceRaw := list[0]
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resource := resourceRaw.toResource()
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return resource, nil
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}
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func (s *Store) DeleteResource(ctx context.Context, delete *api.ResourceDelete) error {
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tx, err := s.db.BeginTx(ctx, nil)
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if err != nil {
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return FormatError(err)
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}
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defer tx.Rollback()
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if err := deleteResource(ctx, tx, delete); err != nil {
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return err
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}
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if err := vacuum(ctx, tx); err != nil {
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return err
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}
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if err := tx.Commit(); err != nil {
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return FormatError(err)
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}
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return nil
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}
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func (s *Store) PatchResource(ctx context.Context, patch *api.ResourcePatch) (*api.Resource, error) {
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tx, err := s.db.BeginTx(ctx, nil)
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if err != nil {
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return nil, FormatError(err)
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}
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defer tx.Rollback()
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resourceRaw, err := patchResource(ctx, tx, patch)
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if err != nil {
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return nil, err
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}
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if err := tx.Commit(); err != nil {
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return nil, FormatError(err)
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}
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resource := resourceRaw.toResource()
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return resource, nil
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}
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func createResource(ctx context.Context, tx *sql.Tx, create *api.ResourceCreate) (*resourceRaw, error) {
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query := `
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INSERT INTO resource (
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filename,
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blob,
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external_link,
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type,
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size,
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creator_id
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)
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VALUES (?, ?, ?, ?, ?, ?)
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RETURNING id, filename, blob, external_link, type, size, creator_id, created_ts, updated_ts
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`
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var resourceRaw resourceRaw
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if err := tx.QueryRowContext(ctx, query, create.Filename, create.Blob, create.ExternalLink, create.Type, create.Size, create.CreatorID).Scan(
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&resourceRaw.ID,
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&resourceRaw.Filename,
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&resourceRaw.Blob,
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&resourceRaw.ExternalLink,
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&resourceRaw.Type,
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&resourceRaw.Size,
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&resourceRaw.CreatorID,
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&resourceRaw.CreatedTs,
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&resourceRaw.UpdatedTs,
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); err != nil {
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return nil, FormatError(err)
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}
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return &resourceRaw, nil
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}
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func patchResource(ctx context.Context, tx *sql.Tx, patch *api.ResourcePatch) (*resourceRaw, error) {
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set, args := []string{}, []interface{}{}
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if v := patch.UpdatedTs; v != nil {
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set, args = append(set, "updated_ts = ?"), append(args, *v)
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}
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if v := patch.Filename; v != nil {
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set, args = append(set, "filename = ?"), append(args, *v)
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}
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args = append(args, patch.ID)
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query := `
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UPDATE resource
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SET ` + strings.Join(set, ", ") + `
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WHERE id = ?
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RETURNING id, filename, blob, external_link, type, size, creator_id, created_ts, updated_ts
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`
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var resourceRaw resourceRaw
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if err := tx.QueryRowContext(ctx, query, args...).Scan(
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&resourceRaw.ID,
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&resourceRaw.Filename,
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&resourceRaw.Blob,
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&resourceRaw.ExternalLink,
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&resourceRaw.Type,
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&resourceRaw.Size,
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&resourceRaw.CreatorID,
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&resourceRaw.CreatedTs,
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&resourceRaw.UpdatedTs,
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); err != nil {
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return nil, FormatError(err)
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}
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return &resourceRaw, nil
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}
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func findResourceList(ctx context.Context, tx *sql.Tx, find *api.ResourceFind) ([]*resourceRaw, error) {
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where, args := []string{"1 = 1"}, []interface{}{}
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if v := find.ID; v != nil {
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where, args = append(where, "id = ?"), append(args, *v)
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}
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if v := find.CreatorID; v != nil {
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where, args = append(where, "creator_id = ?"), append(args, *v)
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}
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if v := find.Filename; v != nil {
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where, args = append(where, "filename = ?"), append(args, *v)
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}
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if v := find.MemoID; v != nil {
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where, args = append(where, "id in (SELECT resource_id FROM memo_resource WHERE memo_id = ?)"), append(args, *v)
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}
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fields := []string{"id", "filename", "external_link", "type", "size", "creator_id", "created_ts", "updated_ts"}
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if find.GetBlob {
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fields = append(fields, "blob")
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}
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query := fmt.Sprintf(`
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SELECT
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%s
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FROM resource
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WHERE %s
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ORDER BY id DESC
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`, strings.Join(fields, ", "), strings.Join(where, " AND "))
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rows, err := tx.QueryContext(ctx, query, args...)
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if err != nil {
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return nil, FormatError(err)
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}
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defer rows.Close()
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resourceRawList := make([]*resourceRaw, 0)
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for rows.Next() {
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var resourceRaw resourceRaw
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dest := []interface{}{
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&resourceRaw.ID,
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&resourceRaw.Filename,
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&resourceRaw.ExternalLink,
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&resourceRaw.Type,
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&resourceRaw.Size,
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&resourceRaw.CreatorID,
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&resourceRaw.CreatedTs,
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&resourceRaw.UpdatedTs,
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}
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if find.GetBlob {
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dest = append(dest, &resourceRaw.Blob)
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}
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if err := rows.Scan(
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dest...,
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); err != nil {
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return nil, FormatError(err)
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}
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resourceRawList = append(resourceRawList, &resourceRaw)
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}
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if err := rows.Err(); err != nil {
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return nil, FormatError(err)
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}
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return resourceRawList, nil
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}
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func deleteResource(ctx context.Context, tx *sql.Tx, delete *api.ResourceDelete) error {
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where, args := []string{"id = ?"}, []interface{}{delete.ID}
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stmt := `DELETE FROM resource WHERE ` + strings.Join(where, " AND ")
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result, err := tx.ExecContext(ctx, stmt, args...)
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if err != nil {
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return FormatError(err)
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}
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rows, _ := result.RowsAffected()
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if rows == 0 {
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return &common.Error{Code: common.NotFound, Err: fmt.Errorf("resource not found")}
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}
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return nil
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}
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func vacuumResource(ctx context.Context, tx *sql.Tx) error {
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stmt := `
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DELETE FROM
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resource
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WHERE
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creator_id NOT IN (
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SELECT
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id
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FROM
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user
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)`
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_, err := tx.ExecContext(ctx, stmt)
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if err != nil {
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return FormatError(err)
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}
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return nil
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}
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