Search bar for issues/pulls (#530)

4 files changed, 252 insertions, 27 deletions

diff --git a/models/issue.go b/models/issue.go
index ac50d2dfba..d926161381 100644
--- a/models/issue.go
+++ b/models/issue.go
@@ -17,6 +17,7 @@ import (
 	"code.gitea.io/gitea/modules/base"
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/modules/util"
 )
 
 var (
@@ -451,8 +452,11 @@ func (issue *Issue) ReadBy(userID int64) error {
 }
 
 func updateIssueCols(e Engine, issue *Issue, cols ...string) error {
-	_, err := e.Id(issue.ID).Cols(cols...).Update(issue)
-	return err
+	if _, err := e.Id(issue.ID).Cols(cols...).Update(issue); err != nil {
+		return err
+	}
+	UpdateIssueIndexer(issue)
+	return nil
 }
 
 // UpdateIssueCols only updates values of specific columns for given issue.
@@ -733,6 +737,8 @@ func newIssue(e *xorm.Session, opts NewIssueOptions) (err error) {
 		return err
 	}
 
+	UpdateIssueIndexer(opts.Issue)
+
 	if len(opts.Attachments) > 0 {
 		attachments, err := getAttachmentsByUUIDs(e, opts.Attachments)
 		if err != nil {
@@ -865,10 +871,11 @@ type IssuesOptions struct {
 	MilestoneID int64
 	RepoIDs     []int64
 	Page        int
-	IsClosed    bool
-	IsPull      bool
+	IsClosed    util.OptionalBool
+	IsPull      util.OptionalBool
 	Labels      string
 	SortType    string
+	IssueIDs    []int64
 }
 
 // sortIssuesSession sort an issues-related session based on the provided
@@ -894,11 +901,23 @@ func sortIssuesSession(sess *xorm.Session, sortType string) {
 
 // Issues returns a list of issues by given conditions.
 func Issues(opts *IssuesOptions) ([]*Issue, error) {
-	if opts.Page <= 0 {
-		opts.Page = 1
+	var sess *xorm.Session
+	if opts.Page >= 0 {
+		var start int
+		if opts.Page == 0 {
+			start = 0
+		} else {
+			start = (opts.Page - 1) * setting.UI.IssuePagingNum
+		}
+		sess = x.Limit(setting.UI.IssuePagingNum, start)
+	} else {
+		sess = x.NewSession()
+		defer sess.Close()
 	}
 
-	sess := x.Limit(setting.UI.IssuePagingNum, (opts.Page-1)*setting.UI.IssuePagingNum)
+	if len(opts.IssueIDs) > 0 {
+		sess.In("issue.id", opts.IssueIDs)
+	}
 
 	if opts.RepoID > 0 {
 		sess.And("issue.repo_id=?", opts.RepoID)
@@ -906,7 +925,13 @@ func Issues(opts *IssuesOptions) ([]*Issue, error) {
 		// In case repository IDs are provided but actually no repository has issue.
 		sess.In("issue.repo_id", opts.RepoIDs)
 	}
-	sess.And("issue.is_closed=?", opts.IsClosed)
+
+	switch opts.IsClosed {
+	case util.OptionalBoolTrue:
+		sess.And("issue.is_closed=true")
+	case util.OptionalBoolFalse:
+		sess.And("issue.is_closed=false")
+	}
 
 	if opts.AssigneeID > 0 {
 		sess.And("issue.assignee_id=?", opts.AssigneeID)
@@ -926,7 +951,12 @@ func Issues(opts *IssuesOptions) ([]*Issue, error) {
 		sess.And("issue.milestone_id=?", opts.MilestoneID)
 	}
 
-	sess.And("issue.is_pull=?", opts.IsPull)
+	switch opts.IsPull {
+	case util.OptionalBoolTrue:
+		sess.And("issue.is_pull=true")
+	case util.OptionalBoolFalse:
+		sess.And("issue.is_pull=false")
+	}
 
 	sortIssuesSession(sess, opts.SortType)
 
@@ -1168,10 +1198,11 @@ type IssueStatsOptions struct {
 	MentionedID int64
 	PosterID    int64
 	IsPull      bool
+	IssueIDs    []int64
 }
 
 // GetIssueStats returns issue statistic information by given conditions.
-func GetIssueStats(opts *IssueStatsOptions) *IssueStats {
+func GetIssueStats(opts *IssueStatsOptions) (*IssueStats, error) {
 	stats := &IssueStats{}
 
 	countSession := func(opts *IssueStatsOptions) *xorm.Session {
@@ -1179,6 +1210,10 @@ func GetIssueStats(opts *IssueStatsOptions) *IssueStats {
 			Where("issue.repo_id = ?", opts.RepoID).
 			And("is_pull = ?", opts.IsPull)
 
+		if len(opts.IssueIDs) > 0 {
+			sess.In("issue.id", opts.IssueIDs)
+		}
+
 		if len(opts.Labels) > 0 && opts.Labels != "0" {
 			labelIDs, err := base.StringsToInt64s(strings.Split(opts.Labels, ","))
 			if err != nil {
@@ -1210,13 +1245,20 @@ func GetIssueStats(opts *IssueStatsOptions) *IssueStats {
 		return sess
 	}
 
-	stats.OpenCount, _ = countSession(opts).
+	var err error
+	stats.OpenCount, err = countSession(opts).
 		And("is_closed = ?", false).
 		Count(&Issue{})
-	stats.ClosedCount, _ = countSession(opts).
+	if err != nil {
+		return nil, err
+	}
+	stats.ClosedCount, err = countSession(opts).
 		And("is_closed = ?", true).
 		Count(&Issue{})
-	return stats
+	if err != nil {
+		return nil, err
+	}
+	return stats, nil
 }
 
 // GetUserIssueStats returns issue statistic information for dashboard by given conditions.
@@ -1294,7 +1336,11 @@ func GetRepoIssueStats(repoID, uid int64, filterMode int, isPull bool) (numOpen
 
 func updateIssue(e Engine, issue *Issue) error {
 	_, err := e.Id(issue.ID).AllCols().Update(issue)
-	return err
+	if err != nil {
+		return err
+	}
+	UpdateIssueIndexer(issue)
+	return nil
 }
 
 // UpdateIssue updates all fields of given issue.
diff --git a/models/issue_comment.go b/models/issue_comment.go
index e9a401b864..a17be97e72 100644
--- a/models/issue_comment.go
+++ b/models/issue_comment.go
@@ -454,28 +454,20 @@ func UpdateComment(c *Comment) error {
 	return err
 }
 
-// DeleteCommentByID deletes the comment by given ID.
-func DeleteCommentByID(id int64) error {
-	comment, err := GetCommentByID(id)
-	if err != nil {
-		if IsErrCommentNotExist(err) {
-			return nil
-		}
-		return err
-	}
-
+// DeleteComment deletes the comment
+func DeleteComment(comment *Comment) error {
 	sess := x.NewSession()
 	defer sessionRelease(sess)
-	if err = sess.Begin(); err != nil {
+	if err := sess.Begin(); err != nil {
 		return err
 	}
 
-	if _, err = sess.Id(comment.ID).Delete(new(Comment)); err != nil {
+	if _, err := sess.Id(comment.ID).Delete(new(Comment)); err != nil {
 		return err
 	}
 
 	if comment.Type == CommentTypeComment {
-		if _, err = sess.Exec("UPDATE `issue` SET num_comments = num_comments - 1 WHERE id = ?", comment.IssueID); err != nil {
+		if _, err := sess.Exec("UPDATE `issue` SET num_comments = num_comments - 1 WHERE id = ?", comment.IssueID); err != nil {
 			return err
 		}
 	}
diff --git a/models/issue_indexer.go b/models/issue_indexer.go
new file mode 100644
index 0000000000..bbaf0e64bc
--- /dev/null
+++ b/models/issue_indexer.go
@@ -0,0 +1,183 @@
+// Copyright 2017 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"
+	"os"
+	"strconv"
+	"strings"
+
+	"code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/modules/util"
+	"github.com/blevesearch/bleve"
+	"github.com/blevesearch/bleve/analysis/analyzer/simple"
+	"github.com/blevesearch/bleve/search/query"
+)
+
+// issueIndexerUpdateQueue queue of issues that need to be updated in the issues
+// indexer
+var issueIndexerUpdateQueue chan *Issue
+
+// issueIndexer (thread-safe) index for searching issues
+var issueIndexer bleve.Index
+
+// issueIndexerData data stored in the issue indexer
+type issueIndexerData struct {
+	ID     int64
+	RepoID int64
+
+	Title   string
+	Content string
+}
+
+// numericQuery an numeric-equality query for the given value and field
+func numericQuery(value int64, field string) *query.NumericRangeQuery {
+	f := float64(value)
+	tru := true
+	q := bleve.NewNumericRangeInclusiveQuery(&f, &f, &tru, &tru)
+	q.SetField(field)
+	return q
+}
+
+// SearchIssuesByKeyword searches for issues by given conditions.
+// Returns the matching issue IDs
+func SearchIssuesByKeyword(repoID int64, keyword string) ([]int64, error) {
+	fields := strings.Fields(strings.ToLower(keyword))
+	indexerQuery := bleve.NewConjunctionQuery(
+		numericQuery(repoID, "RepoID"),
+		bleve.NewDisjunctionQuery(
+			bleve.NewPhraseQuery(fields, "Title"),
+			bleve.NewPhraseQuery(fields, "Content"),
+		))
+	search := bleve.NewSearchRequestOptions(indexerQuery, 2147483647, 0, false)
+	search.Fields = []string{"ID"}
+
+	result, err := issueIndexer.Search(search)
+	if err != nil {
+		return nil, err
+	}
+
+	issueIDs := make([]int64, len(result.Hits))
+	for i, hit := range result.Hits {
+		issueIDs[i] = int64(hit.Fields["ID"].(float64))
+	}
+	return issueIDs, nil
+}
+
+// InitIssueIndexer initialize issue indexer
+func InitIssueIndexer() {
+	_, err := os.Stat(setting.Indexer.IssuePath)
+	if err != nil {
+		if os.IsNotExist(err) {
+			if err = createIssueIndexer(); err != nil {
+				log.Fatal(4, "CreateIssuesIndexer: %v", err)
+			}
+			if err = populateIssueIndexer(); err != nil {
+				log.Fatal(4, "PopulateIssuesIndex: %v", err)
+			}
+		} else {
+			log.Fatal(4, "InitIssuesIndexer: %v", err)
+		}
+	} else {
+		issueIndexer, err = bleve.Open(setting.Indexer.IssuePath)
+		if err != nil {
+			log.Fatal(4, "InitIssuesIndexer, open index: %v", err)
+		}
+	}
+	issueIndexerUpdateQueue = make(chan *Issue, setting.Indexer.UpdateQueueLength)
+	go processIssueIndexerUpdateQueue()
+	// TODO close issueIndexer when Gitea closes
+}
+
+// createIssueIndexer create an issue indexer if one does not already exist
+func createIssueIndexer() error {
+	mapping := bleve.NewIndexMapping()
+	docMapping := bleve.NewDocumentMapping()
+
+	docMapping.AddFieldMappingsAt("ID", bleve.NewNumericFieldMapping())
+	docMapping.AddFieldMappingsAt("RepoID", bleve.NewNumericFieldMapping())
+
+	textFieldMapping := bleve.NewTextFieldMapping()
+	textFieldMapping.Analyzer = simple.Name
+	docMapping.AddFieldMappingsAt("Title", textFieldMapping)
+	docMapping.AddFieldMappingsAt("Content", textFieldMapping)
+
+	mapping.AddDocumentMapping("issues", docMapping)
+
+	var err error
+	issueIndexer, err = bleve.New(setting.Indexer.IssuePath, mapping)
+	return err
+}
+
+// populateIssueIndexer populate the issue indexer with issue data
+func populateIssueIndexer() error {
+	for page := 1; ; page++ {
+		repos, err := Repositories(&SearchRepoOptions{
+			Page:     page,
+			PageSize: 10,
+		})
+		if err != nil {
+			return fmt.Errorf("Repositories: %v", err)
+		}
+		if len(repos) == 0 {
+			return nil
+		}
+		batch := issueIndexer.NewBatch()
+		for _, repo := range repos {
+			issues, err := Issues(&IssuesOptions{
+				RepoID:   repo.ID,
+				IsClosed: util.OptionalBoolNone,
+				IsPull:   util.OptionalBoolNone,
+				Page:     -1, // do not page
+			})
+			if err != nil {
+				return fmt.Errorf("Issues: %v", err)
+			}
+			for _, issue := range issues {
+				err = batch.Index(issue.indexUID(), issue.issueData())
+				if err != nil {
+					return fmt.Errorf("batch.Index: %v", err)
+				}
+			}
+		}
+		if err = issueIndexer.Batch(batch); err != nil {
+			return fmt.Errorf("index.Batch: %v", err)
+		}
+	}
+}
+
+func processIssueIndexerUpdateQueue() {
+	for {
+		select {
+		case issue := <-issueIndexerUpdateQueue:
+			if err := issueIndexer.Index(issue.indexUID(), issue.issueData()); err != nil {
+				log.Error(4, "issuesIndexer.Index: %v", err)
+			}
+		}
+	}
+}
+
+// indexUID a unique identifier for an issue used in full-text indices
+func (issue *Issue) indexUID() string {
+	return strconv.FormatInt(issue.ID, 36)
+}
+
+func (issue *Issue) issueData() *issueIndexerData {
+	return &issueIndexerData{
+		ID:      issue.ID,
+		RepoID:  issue.RepoID,
+		Title:   issue.Title,
+		Content: issue.Content,
+	}
+}
+
+// UpdateIssueIndexer add/update an issue to the issue indexer
+func UpdateIssueIndexer(issue *Issue) {
+	go func() {
+		issueIndexerUpdateQueue <- issue
+	}()
+}
diff --git a/models/models.go b/models/models.go
index d9716e79bd..1ce704a9e4 100644
--- a/models/models.go
+++ b/models/models.go
@@ -138,6 +138,10 @@ func LoadConfigs() {
 	}
 	DbCfg.SSLMode = sec.Key("SSL_MODE").String()
 	DbCfg.Path = sec.Key("PATH").MustString("data/gitea.db")
+
+	sec = setting.Cfg.Section("indexer")
+	setting.Indexer.IssuePath = sec.Key("ISSUE_INDEXER_PATH").MustString("indexers/issues.bleve")
+	setting.Indexer.UpdateQueueLength = sec.Key("UPDATE_BUFFER_LEN").MustInt(20)
 }
 
 // parsePostgreSQLHostPort parses given input in various forms defined in