Add the ability to use multiple labels as filters

models/issue.go

@@ -1210,7 +1210,7 @@ type IssuesOptions struct {
 	PageSize    int
 	IsClosed    util.OptionalBool
 	IsPull      util.OptionalBool
-	Labels      string
+	LabelIDs    []int64
 	SortType    string
 	IssueIDs    []int64
 }
@@ -1289,15 +1289,10 @@ func (opts *IssuesOptions) setupSession(sess *xorm.Session) error {
 		sess.And("issue.is_pull=?", false)
 	}
 
-	if len(opts.Labels) > 0 && opts.Labels != "0" {
-		labelIDs, err := base.StringsToInt64s(strings.Split(opts.Labels, ","))
-		if err != nil {
-			return err
-		}
-		if len(labelIDs) > 0 {
-			sess.
-				Join("INNER", "issue_label", "issue.id = issue_label.issue_id").
-				In("issue_label.label_id", labelIDs)
+	if opts.LabelIDs != nil {
+		for i, labelID := range opts.LabelIDs {
+			sess.Join("INNER", fmt.Sprintf("issue_label il%d", i),
+				fmt.Sprintf("issue.id = il%[1]d.issue_id AND il%[1]d.label_id = %[2]d", i, labelID))
 		}
 	}
 	return nil
@@ -1475,9 +1470,11 @@ func GetIssueStats(opts *IssueStatsOptions) (*IssueStats, error) {
 			labelIDs, err := base.StringsToInt64s(strings.Split(opts.Labels, ","))
 			if err != nil {
 				log.Warn("Malformed Labels argument: %s", opts.Labels)
-			} else if len(labelIDs) > 0 {
-				sess.Join("INNER", "issue_label", "issue.id = issue_label.issue_id").
-					In("issue_label.label_id", labelIDs)
+			} else {
+				for i, labelID := range labelIDs {
+					sess.Join("INNER", fmt.Sprintf("issue_label il%d", i),
+						fmt.Sprintf("issue.id = il%[1]d.issue_id AND il%[1]d.label_id = %[2]d", i, labelID))
+				}
 			}
 		}
 

models/issue_label.go

@@ -69,6 +69,8 @@ type Label struct {
 	NumClosedIssues int
 	NumOpenIssues   int  `xorm:"-"`
 	IsChecked       bool `xorm:"-"`
+	QueryString     string
+	IsSelected      bool
 }
 
 // APIFormat converts a Label to the api.Label format
@@ -85,6 +87,25 @@ func (label *Label) CalOpenIssues() {
 	label.NumOpenIssues = label.NumIssues - label.NumClosedIssues
 }
 
+// LoadSelectedLabelsAfterClick calculates the set of selected labels when a label is clicked
+func (label *Label) LoadSelectedLabelsAfterClick(currentSelectedLabels []int64) {
+	var labelQuerySlice []string
+	labelSelected := false
+	labelID := strconv.FormatInt(label.ID, 10)
+	for _, s := range currentSelectedLabels {
+		if s == label.ID {
+			labelSelected = true
+		} else if s > 0 {
+			labelQuerySlice = append(labelQuerySlice, strconv.FormatInt(s, 10))
+		}
+	}
+	if !labelSelected {
+		labelQuerySlice = append(labelQuerySlice, labelID)
+	}
+	label.IsSelected = labelSelected
+	label.QueryString = strings.Join(labelQuerySlice, ",")
+}
+
 // ForegroundColor calculates the text color for labels based
 // on their background color.
 func (label *Label) ForegroundColor() template.CSS {

models/issue_test.go

@@ -193,11 +193,19 @@ func TestIssues(t *testing.T) {
 		},
 		{
 			IssuesOptions{
-				Labels:   "1,2",
+				LabelIDs: []int64{1},
 				Page:     1,
 				PageSize: 4,
 			},
-			[]int64{5, 2, 1},
+			[]int64{2, 1},
+		},
+		{
+			IssuesOptions{
+				LabelIDs: []int64{1, 2},
+				Page:     1,
+				PageSize: 4,
+			},
+			[]int64{}, // issues with **both** label 1 and 2, none of these issues matches, TODO: add more tests
 		},
 	} {
 		issues, err := Issues(&test.Opts)

public/less/_repository.less

@@ -129,8 +129,11 @@
             margin: 5px -7px 0 -5px;
             width: 16px;
         }
-        .text{
-          margin-left: 0.9em;
+        &.labels .octicon {
+            margin: -2px -7px 0 -5px;
+        }
+        .text {
+            margin-left: 0.9em;
         }
         .menu {
             max-height: 300px;

routers/repo/issue.go

@@ -112,8 +112,15 @@ func issues(ctx *context.Context, milestoneID int64, isPullOption util.OptionalB
 	}
 
 	repo := ctx.Repo.Repository
+	var labelIDs []int64
 	selectLabels := ctx.Query("labels")
-
+	if len(selectLabels) > 0 && selectLabels != "0" {
+		labelIDs, err = base.StringsToInt64s(strings.Split(selectLabels, ","))
+		if err != nil {
+			ctx.ServerError("StringsToInt64s", err)
+			return
+		}
+	}
 	isShowClosed := ctx.Query("state") == "closed"
 
 	keyword := strings.Trim(ctx.Query("q"), " ")
@@ -176,7 +183,7 @@ func issues(ctx *context.Context, milestoneID int64, isPullOption util.OptionalB
 			PageSize:    setting.UI.IssuePagingNum,
 			IsClosed:    util.OptionalBoolOf(isShowClosed),
 			IsPull:      isPullOption,
-			Labels:      selectLabels,
+			LabelIDs:    labelIDs,
 			SortType:    sortType,
 			IssueIDs:    issueIDs,
 		})
@@ -210,7 +217,11 @@ func issues(ctx *context.Context, milestoneID int64, isPullOption util.OptionalB
 		ctx.ServerError("GetLabelsByRepoID", err)
 		return
 	}
+	for _, l := range labels {
+		l.LoadSelectedLabelsAfterClick(labelIDs)
+	}
 	ctx.Data["Labels"] = labels
+	ctx.Data["NumLabels"] = len(labels)
 
 	if ctx.QueryInt64("assignee") == 0 {
 		assigneeID = 0 // Reset ID to prevent unexpected selection of assignee.

routers/routes/routes.go

@@ -656,7 +656,7 @@ func RegisterRoutes(m *macaron.Macaron) {
 
 	m.Group("/:username/:reponame", func() {
 		m.Group("", func() {
-			m.Get("/^:type(issues|pulls)$", repo.RetrieveLabels, repo.Issues)
+			m.Get("/^:type(issues|pulls)$", repo.Issues)
 			m.Get("/^:type(issues|pulls)$/:index", repo.ViewIssue)
 			m.Get("/labels/", reqRepoIssuesOrPullsReader, repo.RetrieveLabels, repo.Labels)
 			m.Get("/milestones", reqRepoIssuesOrPullsReader, repo.Milestones)

routers/user/home.go

@@ -8,6 +8,7 @@ import (
 	"bytes"
 	"fmt"
 	"sort"
+	"strings"
 
 	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/modules/base"
@@ -256,7 +257,16 @@ func Issues(ctx *context.Context) {
 
 	opts.Page = page
 	opts.PageSize = setting.UI.IssuePagingNum
-	opts.Labels = ctx.Query("labels")
+	var labelIDs []int64
+	selectLabels := ctx.Query("labels")
+	if len(selectLabels) > 0 && selectLabels != "0" {
+		labelIDs, err = base.StringsToInt64s(strings.Split(selectLabels, ","))
+		if err != nil {
+			ctx.ServerError("StringsToInt64s", err)
+			return
+		}
+	}
+	opts.LabelIDs = labelIDs
 
 	issues, err := models.Issues(opts)
 	if err != nil {

templates/repo/issue/list.tmpl

@@ -32,7 +32,7 @@
 				</div>
 			</div>
 			<div class="ten wide right aligned column">
-				<div class="ui secondary filter stackable menu">
+				<div class="ui secondary filter stackable menu labels">
 					<!-- Label -->
 					<div class="ui {{if not .Labels}}disabled{{end}} dropdown jump item" style="margin-left: auto">
 						<span class="text">
@@ -42,7 +42,7 @@
 						<div class="menu">
 							<a class="item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&milestone={{$.MilestoneID}}&assignee={{$.AssigneeID}}">{{.i18n.Tr "repo.issues.filter_label_no_select"}}</a>
 							{{range .Labels}}
-								<a class="item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{.ID}}&milestone={{$.MilestoneID}}&assignee={{$.AssigneeID}}"><span class="octicon {{if eq $.SelectLabels .ID}}octicon-check{{end}}"></span><span class="label color" style="background-color: {{.Color}}"></span> {{.Name}}</a>
+								<a class="item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{.QueryString}}&milestone={{$.MilestoneID}}&assignee={{$.AssigneeID}}"><span class="octicon {{if .IsSelected}}octicon-check{{end}}"></span><span class="label color" style="background-color: {{.Color}}"></span> {{.Name}}</a>
 							{{end}}
 						</div>
 					</div>