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tag.go
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tag.go
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package postgres
import (
"fmt"
"time"
"github.com/getfider/fider/app/models"
"github.com/getfider/fider/app/pkg/dbx"
"github.com/getfider/fider/app/pkg/errors"
"github.com/gosimple/slug"
)
type dbTag struct {
ID int `db:"id"`
Name string `db:"name"`
Slug string `db:"slug"`
Color string `db:"color"`
IsPublic bool `db:"is_public"`
}
func (t *dbTag) toModel() *models.Tag {
return &models.Tag{
ID: t.ID,
Name: t.Name,
Slug: t.Slug,
Color: t.Color,
IsPublic: t.IsPublic,
}
}
// TagStorage contains read and write operations for tags
type TagStorage struct {
trx *dbx.Trx
tenant *models.Tenant
user *models.User
}
// NewTagStorage creates a new TagStorage
func NewTagStorage(trx *dbx.Trx) *TagStorage {
return &TagStorage{
trx: trx,
}
}
// SetCurrentTenant to current context
func (s *TagStorage) SetCurrentTenant(tenant *models.Tenant) {
s.tenant = tenant
}
// SetCurrentUser to current context
func (s *TagStorage) SetCurrentUser(user *models.User) {
s.user = user
}
// Add creates a new tag with given input
func (s *TagStorage) Add(name, color string, isPublic bool) (*models.Tag, error) {
tagSlug := slug.Make(name)
var id int
err := s.trx.Get(&id, `
INSERT INTO tags (name, slug, color, is_public, created_at, tenant_id)
VALUES ($1, $2, $3, $4, $5, $6) RETURNING id
`, name, tagSlug, color, isPublic, time.Now(), s.tenant.ID)
if err != nil {
return nil, errors.Wrap(err, "failed to add new tag")
}
return s.GetBySlug(tagSlug)
}
// GetBySlug returns tag by given slug
func (s *TagStorage) GetBySlug(slug string) (*models.Tag, error) {
tag := dbTag{}
err := s.trx.Get(&tag, "SELECT id, name, slug, color, is_public FROM tags WHERE tenant_id = $1 AND slug = $2", s.tenant.ID, slug)
if err != nil {
return nil, errors.Wrap(err, "failed to get tag with slug '%s'", slug)
}
return tag.toModel(), nil
}
// Update a tag with given input
func (s *TagStorage) Update(tag *models.Tag, name, color string, isPublic bool) (*models.Tag, error) {
tagSlug := slug.Make(name)
_, err := s.trx.Execute(`UPDATE tags SET name = $1, slug = $2, color = $3, is_public = $4
WHERE id = $5 AND tenant_id = $6`, name, tagSlug, color, isPublic, tag.ID, s.tenant.ID)
if err != nil {
return nil, errors.Wrap(err, "failed to update tag")
}
return s.GetBySlug(tagSlug)
}
// Delete a tag by its id
func (s *TagStorage) Delete(tag *models.Tag) error {
_, err := s.trx.Execute(`DELETE FROM post_tags WHERE tag_id = $1 AND tenant_id = $2`, tag.ID, s.tenant.ID)
if err != nil {
return errors.Wrap(err, "failed to remove tag with id '%d' from all posts", tag.ID)
}
_, err = s.trx.Execute(`DELETE FROM tags WHERE id = $1 AND tenant_id = $2`, tag.ID, s.tenant.ID)
if err != nil {
return errors.Wrap(err, "failed to delete tag with id '%d'", tag.ID)
}
return nil
}
// AssignTag adds a tag to an post
func (s *TagStorage) AssignTag(tag *models.Tag, post *models.Post) error {
alreadyAssigned, err := s.trx.Exists("SELECT 1 FROM post_tags WHERE post_id = $1 AND tag_id = $2 AND tenant_id = $3", post.ID, tag.ID, s.tenant.ID)
if err != nil {
return errors.Wrap(err, "failed to check if tag is already assigned")
}
if alreadyAssigned {
return nil
}
_, err = s.trx.Execute(
`INSERT INTO post_tags (tag_id, post_id, created_at, created_by_id, tenant_id) VALUES ($1, $2, $3, $4, $5)`,
tag.ID, post.ID, time.Now(), s.user.ID, s.tenant.ID,
)
if err != nil {
return errors.Wrap(err, "failed to assign tag to post")
}
return nil
}
// UnassignTag removes a tag from an post
func (s *TagStorage) UnassignTag(tag *models.Tag, post *models.Post) error {
_, err := s.trx.Execute(
`DELETE FROM post_tags WHERE tag_id = $1 AND post_id = $2 AND tenant_id = $3`,
tag.ID, post.ID, s.tenant.ID,
)
if err != nil {
return errors.Wrap(err, "failed to unassign tag from post")
}
return nil
}
// GetAssigned returns all tags assigned to given post
func (s *TagStorage) GetAssigned(post *models.Post) ([]*models.Tag, error) {
tags, err := s.getTags(`
SELECT t.id, t.name, t.slug, t.color, t.is_public
FROM tags t
INNER JOIN post_tags pt
ON pt.tag_id = t.id
AND pt.tenant_id = t.tenant_id
WHERE pt.post_id = $1 AND t.tenant_id = $2
ORDER BY t.name
`, post.ID, s.tenant.ID)
if err != nil {
return nil, errors.Wrap(err, "failed get assigned tags")
}
return tags, nil
}
// GetAll returns all tags
func (s *TagStorage) GetAll() ([]*models.Tag, error) {
condition := `AND t.is_public = true`
if s.user != nil && s.user.IsCollaborator() {
condition = ``
}
query := fmt.Sprintf(`
SELECT t.id, t.name, t.slug, t.color, t.is_public
FROM tags t
WHERE t.tenant_id = $1 %s
ORDER BY t.name
`, condition)
tags, err := s.getTags(query, s.tenant.ID)
if err != nil {
return nil, errors.Wrap(err, "failed get all tags")
}
return tags, nil
}
// GetAll returns all tags
func (s *TagStorage) getTags(query string, args ...interface{}) ([]*models.Tag, error) {
tags := []*dbTag{}
err := s.trx.Select(&tags, query, args...)
if err != nil {
return nil, err
}
var result = make([]*models.Tag, len(tags))
for i, tag := range tags {
result[i] = tag.toModel()
}
return result, nil
}