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// Copyright 2018 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package models
import (
"fmt"
"regexp"
"strings"
"code.gitea.io/gitea/modules/timeutil"
"xorm.io/builder"
)
func init() {
tables = append(tables,
new(Topic),
new(RepoTopic),
)
}
var topicPattern = regexp.MustCompile(`^[a-z0-9][a-z0-9-]*$`)
// Topic represents a topic of repositories
type Topic struct {
ID int64
Name string `xorm:"UNIQUE VARCHAR(25)"`
RepoCount int
CreatedUnix timeutil.TimeStamp `xorm:"INDEX created"`
UpdatedUnix timeutil.TimeStamp `xorm:"INDEX updated"`
}
// RepoTopic represents associated repositories and topics
type RepoTopic struct {
RepoID int64 `xorm:"UNIQUE(s)"`
TopicID int64 `xorm:"UNIQUE(s)"`
}
// ErrTopicNotExist represents an error that a topic is not exist
type ErrTopicNotExist struct {
Name string
}
// IsErrTopicNotExist checks if an error is an ErrTopicNotExist.
func IsErrTopicNotExist(err error) bool {
_, ok := err.(ErrTopicNotExist)
return ok
}
// Error implements error interface
func (err ErrTopicNotExist) Error() string {
return fmt.Sprintf("topic is not exist [name: %s]", err.Name)
}
// ValidateTopic checks topics by length and match pattern rules
func ValidateTopic(topic string) bool {
return len(topic) <= 35 && topicPattern.MatchString(topic)
}
// GetTopicByName retrieves topic by name
func GetTopicByName(name string) (*Topic, error) {
var topic Topic
if has, err := x.Where("name = ?", name).Get(&topic); err != nil {
return nil, err
} else if !has {
return nil, ErrTopicNotExist{name}
}
return &topic, nil
}
// FindTopicOptions represents the options when fdin topics
type FindTopicOptions struct {
RepoID int64
Keyword string
Limit int
Page int
}
func (opts *FindTopicOptions) toConds() builder.Cond {
var cond = builder.NewCond()
if opts.RepoID > 0 {
cond = cond.And(builder.Eq{"repo_topic.repo_id": opts.RepoID})
}
if opts.Keyword != "" {
cond = cond.And(builder.Like{"topic.name", opts.Keyword})
}
return cond
}
// FindTopics retrieves the topics via FindTopicOptions
func FindTopics(opts *FindTopicOptions) (topics []*Topic, err error) {
sess := x.Select("topic.*").Where(opts.toConds())
if opts.RepoID > 0 {
sess.Join("INNER", "repo_topic", "repo_topic.topic_id = topic.id")
}
if opts.Limit > 0 {
sess.Limit(opts.Limit, opts.Page*opts.Limit)
}
return topics, sess.Desc("topic.repo_count").Find(&topics)
}
// SaveTopics save topics to a repository
func SaveTopics(repoID int64, topicNames ...string) error {
topics, err := FindTopics(&FindTopicOptions{
RepoID: repoID,
})
if err != nil {
return err
}
sess := x.NewSession()
defer sess.Close()
if err := sess.Begin(); err != nil {
return err
}
var addedTopicNames []string
for _, topicName := range topicNames {
if strings.TrimSpace(topicName) == "" {
continue
}
var found bool
for _, t := range topics {
if strings.EqualFold(topicName, t.Name) {
found = true
break
}
}
if !found {
addedTopicNames = append(addedTopicNames, topicName)
}
}
var removeTopics []*Topic
for _, t := range topics {
var found bool
for _, topicName := range topicNames {
if strings.EqualFold(topicName, t.Name) {
found = true
break
}
}
if !found {
removeTopics = append(removeTopics, t)
}
}
for _, topicName := range addedTopicNames {
var topic Topic
if has, err := sess.Where("name = ?", topicName).Get(&topic); err != nil {
return err
} else if !has {
topic.Name = topicName
topic.RepoCount = 1
if _, err := sess.Insert(&topic); err != nil {
return err
}
} else {
topic.RepoCount++
if _, err := sess.ID(topic.ID).Cols("repo_count").Update(&topic); err != nil {
return err
}
}
if _, err := sess.Insert(&RepoTopic{
RepoID: repoID,
TopicID: topic.ID,
}); err != nil {
return err
}
}
for _, topic := range removeTopics {
topic.RepoCount--
if _, err := sess.ID(topic.ID).Cols("repo_count").Update(topic); err != nil {
return err
}
if _, err := sess.Delete(&RepoTopic{
RepoID: repoID,
TopicID: topic.ID,
}); err != nil {
return err
}
}
topicNames = make([]string, 0, 25)
if err := sess.Table("topic").Cols("name").
Join("INNER", "repo_topic", "repo_topic.topic_id = topic.id").
Where("repo_topic.repo_id = ?", repoID).Desc("topic.repo_count").Find(&topicNames); err != nil {
return err
}
if _, err := sess.ID(repoID).Cols("topics").Update(&Repository{
Topics: topicNames,
}); err != nil {
return err
}
return sess.Commit()
}
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