Never use /api/v1 from Gitea UI Pages (#19318)

Reusing `/api/v1` from Gitea UI Pages have pros and cons.
Pros:
1) Less code copy

Cons:
1) API/v1 have to support shared session with page requests.
2) You need to consider for each other when you want to change something about api/v1 or page.

This PR moves all dependencies to API/v1 from UI Pages.

Partially replace #16052  

15 files changed, 719 insertions, 96 deletions

diff --git a/routers/api/v1/notify/notifications.go b/routers/api/v1/notify/notifications.go
index 1821c30377..c707cf4524 100644
--- a/routers/api/v1/notify/notifications.go
+++ b/routers/api/v1/notify/notifications.go
@@ -26,7 +26,7 @@ func NewAvailable(ctx *context.APIContext) {
 }
 
 func getFindNotificationOptions(ctx *context.APIContext) *models.FindNotificationOptions {
-	before, since, err := utils.GetQueryBeforeSince(ctx)
+	before, since, err := context.GetQueryBeforeSince(ctx.Context)
 	if err != nil {
 		ctx.Error(http.StatusUnprocessableEntity, "GetQueryBeforeSince", err)
 		return nil
diff --git a/routers/api/v1/repo/issue.go b/routers/api/v1/repo/issue.go
index 05c9c27144..cd05ce12ca 100644
--- a/routers/api/v1/repo/issue.go
+++ b/routers/api/v1/repo/issue.go
@@ -111,7 +111,7 @@ func SearchIssues(ctx *context.APIContext) {
 	//   "200":
 	//     "$ref": "#/responses/IssueList"
 
-	before, since, err := utils.GetQueryBeforeSince(ctx)
+	before, since, err := context.GetQueryBeforeSince(ctx.Context)
 	if err != nil {
 		ctx.Error(http.StatusUnprocessableEntity, "GetQueryBeforeSince", err)
 		return
@@ -359,7 +359,7 @@ func ListIssues(ctx *context.APIContext) {
 	// responses:
 	//   "200":
 	//     "$ref": "#/responses/IssueList"
-	before, since, err := utils.GetQueryBeforeSince(ctx)
+	before, since, err := context.GetQueryBeforeSince(ctx.Context)
 	if err != nil {
 		ctx.Error(http.StatusUnprocessableEntity, "GetQueryBeforeSince", err)
 		return
diff --git a/routers/api/v1/repo/issue_comment.go b/routers/api/v1/repo/issue_comment.go
index d63a71afc2..ef91a2481c 100644
--- a/routers/api/v1/repo/issue_comment.go
+++ b/routers/api/v1/repo/issue_comment.go
@@ -58,7 +58,7 @@ func ListIssueComments(ctx *context.APIContext) {
 	//   "200":
 	//     "$ref": "#/responses/CommentList"
 
-	before, since, err := utils.GetQueryBeforeSince(ctx)
+	before, since, err := context.GetQueryBeforeSince(ctx.Context)
 	if err != nil {
 		ctx.Error(http.StatusUnprocessableEntity, "GetQueryBeforeSince", err)
 		return
@@ -150,7 +150,7 @@ func ListIssueCommentsAndTimeline(ctx *context.APIContext) {
 	//   "200":
 	//     "$ref": "#/responses/TimelineList"
 
-	before, since, err := utils.GetQueryBeforeSince(ctx)
+	before, since, err := context.GetQueryBeforeSince(ctx.Context)
 	if err != nil {
 		ctx.Error(http.StatusUnprocessableEntity, "GetQueryBeforeSince", err)
 		return
@@ -253,7 +253,7 @@ func ListRepoIssueComments(ctx *context.APIContext) {
 	//   "200":
 	//     "$ref": "#/responses/CommentList"
 
-	before, since, err := utils.GetQueryBeforeSince(ctx)
+	before, since, err := context.GetQueryBeforeSince(ctx.Context)
 	if err != nil {
 		ctx.Error(http.StatusUnprocessableEntity, "GetQueryBeforeSince", err)
 		return
diff --git a/routers/api/v1/repo/issue_tracked_time.go b/routers/api/v1/repo/issue_tracked_time.go
index 19732c101f..e42dc60a94 100644
--- a/routers/api/v1/repo/issue_tracked_time.go
+++ b/routers/api/v1/repo/issue_tracked_time.go
@@ -103,7 +103,7 @@ func ListTrackedTimes(ctx *context.APIContext) {
 		opts.UserID = user.ID
 	}
 
-	if opts.CreatedBeforeUnix, opts.CreatedAfterUnix, err = utils.GetQueryBeforeSince(ctx); err != nil {
+	if opts.CreatedBeforeUnix, opts.CreatedAfterUnix, err = context.GetQueryBeforeSince(ctx.Context); err != nil {
 		ctx.Error(http.StatusUnprocessableEntity, "GetQueryBeforeSince", err)
 		return
 	}
@@ -522,7 +522,7 @@ func ListTrackedTimesByRepository(ctx *context.APIContext) {
 	}
 
 	var err error
-	if opts.CreatedBeforeUnix, opts.CreatedAfterUnix, err = utils.GetQueryBeforeSince(ctx); err != nil {
+	if opts.CreatedBeforeUnix, opts.CreatedAfterUnix, err = context.GetQueryBeforeSince(ctx.Context); err != nil {
 		ctx.Error(http.StatusUnprocessableEntity, "GetQueryBeforeSince", err)
 		return
 	}
@@ -597,7 +597,7 @@ func ListMyTrackedTimes(ctx *context.APIContext) {
 	}
 
 	var err error
-	if opts.CreatedBeforeUnix, opts.CreatedAfterUnix, err = utils.GetQueryBeforeSince(ctx); err != nil {
+	if opts.CreatedBeforeUnix, opts.CreatedAfterUnix, err = context.GetQueryBeforeSince(ctx.Context); err != nil {
 		ctx.Error(http.StatusUnprocessableEntity, "GetQueryBeforeSince", err)
 		return
 	}
diff --git a/routers/api/v1/repo/repo.go b/routers/api/v1/repo/repo.go
index aca1338a27..f645502590 100644
--- a/routers/api/v1/repo/repo.go
+++ b/routers/api/v1/repo/repo.go
@@ -31,23 +31,6 @@ import (
 	repo_service "code.gitea.io/gitea/services/repository"
 )
 
-var searchOrderByMap = map[string]map[string]db.SearchOrderBy{
-	"asc": {
-		"alpha":   db.SearchOrderByAlphabetically,
-		"created": db.SearchOrderByOldest,
-		"updated": db.SearchOrderByLeastUpdated,
-		"size":    db.SearchOrderBySize,
-		"id":      db.SearchOrderByID,
-	},
-	"desc": {
-		"alpha":   db.SearchOrderByAlphabeticallyReverse,
-		"created": db.SearchOrderByNewest,
-		"updated": db.SearchOrderByRecentUpdated,
-		"size":    db.SearchOrderBySizeReverse,
-		"id":      db.SearchOrderByIDReverse,
-	},
-}
-
 // Search repositories via options
 func Search(ctx *context.APIContext) {
 	// swagger:operation GET /repos/search repository repoSearch
@@ -193,7 +176,7 @@ func Search(ctx *context.APIContext) {
 		if len(sortOrder) == 0 {
 			sortOrder = "asc"
 		}
-		if searchModeMap, ok := searchOrderByMap[sortOrder]; ok {
+		if searchModeMap, ok := context.SearchOrderByMap[sortOrder]; ok {
 			if orderBy, ok := searchModeMap[sortMode]; ok {
 				opts.OrderBy = orderBy
 			} else {
diff --git a/routers/api/v1/utils/page.go b/routers/api/v1/utils/page.go
new file mode 100644
index 0000000000..608bec7395
--- /dev/null
+++ b/routers/api/v1/utils/page.go
@@ -0,0 +1,19 @@
+// 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 utils
+
+import (
+	"code.gitea.io/gitea/models/db"
+	"code.gitea.io/gitea/modules/context"
+	"code.gitea.io/gitea/modules/convert"
+)
+
+// GetListOptions returns list options using the page and limit parameters
+func GetListOptions(ctx *context.APIContext) db.ListOptions {
+	return db.ListOptions{
+		Page:     ctx.FormInt("page"),
+		PageSize: convert.ToCorrectPageSize(ctx.FormInt("limit")),
+	}
+}
diff --git a/routers/api/v1/utils/utils.go b/routers/api/v1/utils/utils.go
deleted file mode 100644
index 7564857115..0000000000
--- a/routers/api/v1/utils/utils.go
+++ /dev/null
@@ -1,68 +0,0 @@
-// 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 utils
-
-import (
-	"net/url"
-	"strings"
-	"time"
-
-	"code.gitea.io/gitea/models/db"
-	"code.gitea.io/gitea/modules/context"
-	"code.gitea.io/gitea/modules/convert"
-)
-
-// GetQueryBeforeSince return parsed time (unix format) from URL query's before and since
-func GetQueryBeforeSince(ctx *context.APIContext) (before, since int64, err error) {
-	qCreatedBefore, err := prepareQueryArg(ctx, "before")
-	if err != nil {
-		return 0, 0, err
-	}
-
-	qCreatedSince, err := prepareQueryArg(ctx, "since")
-	if err != nil {
-		return 0, 0, err
-	}
-
-	before, err = parseTime(qCreatedBefore)
-	if err != nil {
-		return 0, 0, err
-	}
-
-	since, err = parseTime(qCreatedSince)
-	if err != nil {
-		return 0, 0, err
-	}
-	return before, since, nil
-}
-
-// parseTime parse time and return unix timestamp
-func parseTime(value string) (int64, error) {
-	if len(value) != 0 {
-		t, err := time.Parse(time.RFC3339, value)
-		if err != nil {
-			return 0, err
-		}
-		if !t.IsZero() {
-			return t.Unix(), nil
-		}
-	}
-	return 0, nil
-}
-
-// prepareQueryArg unescape and trim a query arg
-func prepareQueryArg(ctx *context.APIContext, name string) (value string, err error) {
-	value, err = url.PathUnescape(ctx.FormString(name))
-	value = strings.TrimSpace(value)
-	return
-}
-
-// GetListOptions returns list options using the page and limit parameters
-func GetListOptions(ctx *context.APIContext) db.ListOptions {
-	return db.ListOptions{
-		Page:     ctx.FormInt("page"),
-		PageSize: convert.ToCorrectPageSize(ctx.FormInt("limit")),
-	}
-}
diff --git a/routers/web/explore/topic.go b/routers/web/explore/topic.go
new file mode 100644
index 0000000000..39b87f2498
--- /dev/null
+++ b/routers/web/explore/topic.go
@@ -0,0 +1,42 @@
+// Copyright 2022 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 explore
+
+import (
+	"net/http"
+
+	"code.gitea.io/gitea/models/db"
+	repo_model "code.gitea.io/gitea/models/repo"
+	"code.gitea.io/gitea/modules/context"
+	"code.gitea.io/gitea/modules/convert"
+	api "code.gitea.io/gitea/modules/structs"
+)
+
+// TopicSearch search for creating topic
+func TopicSearch(ctx *context.Context) {
+	opts := &repo_model.FindTopicOptions{
+		Keyword: ctx.FormString("q"),
+		ListOptions: db.ListOptions{
+			Page:     ctx.FormInt("page"),
+			PageSize: convert.ToCorrectPageSize(ctx.FormInt("limit")),
+		},
+	}
+
+	topics, total, err := repo_model.FindTopics(opts)
+	if err != nil {
+		ctx.Error(http.StatusInternalServerError)
+		return
+	}
+
+	topicResponses := make([]*api.TopicResponse, len(topics))
+	for i, topic := range topics {
+		topicResponses[i] = convert.ToTopicResponse(topic)
+	}
+
+	ctx.SetTotalCountHeader(total)
+	ctx.JSON(http.StatusOK, map[string]interface{}{
+		"topics": topicResponses,
+	})
+}
diff --git a/routers/web/org/teams.go b/routers/web/org/teams.go
index 034a8ce978..31bfaea92f 100644
--- a/routers/web/org/teams.go
+++ b/routers/web/org/teams.go
@@ -13,6 +13,7 @@ import (
 	"strings"
 
 	"code.gitea.io/gitea/models"
+	"code.gitea.io/gitea/models/db"
 	"code.gitea.io/gitea/models/organization"
 	"code.gitea.io/gitea/models/perm"
 	repo_model "code.gitea.io/gitea/models/repo"
@@ -20,7 +21,9 @@ import (
 	user_model "code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/modules/base"
 	"code.gitea.io/gitea/modules/context"
+	"code.gitea.io/gitea/modules/convert"
 	"code.gitea.io/gitea/modules/log"
+	api "code.gitea.io/gitea/modules/structs"
 	"code.gitea.io/gitea/modules/web"
 	"code.gitea.io/gitea/routers/utils"
 	"code.gitea.io/gitea/services/forms"
@@ -329,6 +332,51 @@ func TeamRepositories(ctx *context.Context) {
 	ctx.HTML(http.StatusOK, tplTeamRepositories)
 }
 
+// SearchTeam api for searching teams
+func SearchTeam(ctx *context.Context) {
+	listOptions := db.ListOptions{
+		Page:     ctx.FormInt("page"),
+		PageSize: convert.ToCorrectPageSize(ctx.FormInt("limit")),
+	}
+
+	opts := &organization.SearchTeamOptions{
+		UserID:      ctx.Doer.ID,
+		Keyword:     ctx.FormTrim("q"),
+		OrgID:       ctx.Org.Organization.ID,
+		IncludeDesc: ctx.FormString("include_desc") == "" || ctx.FormBool("include_desc"),
+		ListOptions: listOptions,
+	}
+
+	teams, maxResults, err := organization.SearchTeam(opts)
+	if err != nil {
+		log.Error("SearchTeam failed: %v", err)
+		ctx.JSON(http.StatusInternalServerError, map[string]interface{}{
+			"ok":    false,
+			"error": "SearchTeam internal failure",
+		})
+		return
+	}
+
+	apiTeams := make([]*api.Team, len(teams))
+	for i := range teams {
+		if err := teams[i].GetUnits(); err != nil {
+			log.Error("Team GetUnits failed: %v", err)
+			ctx.JSON(http.StatusInternalServerError, map[string]interface{}{
+				"ok":    false,
+				"error": "SearchTeam failed to get units",
+			})
+			return
+		}
+		apiTeams[i] = convert.ToTeam(teams[i])
+	}
+
+	ctx.SetTotalCountHeader(maxResults)
+	ctx.JSON(http.StatusOK, map[string]interface{}{
+		"ok":   true,
+		"data": apiTeams,
+	})
+}
+
 // EditTeam render team edit page
 func EditTeam(ctx *context.Context) {
 	ctx.Data["Title"] = ctx.Org.Organization.FullName
diff --git a/routers/web/repo/issue.go b/routers/web/repo/issue.go
index a1a7200ba4..1fd60812f9 100644
--- a/routers/web/repo/issue.go
+++ b/routers/web/repo/issue.go
@@ -16,6 +16,7 @@ import (
 	"path"
 	"strconv"
 	"strings"
+	"time"
 
 	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/models/db"
@@ -36,6 +37,7 @@ import (
 	"code.gitea.io/gitea/modules/setting"
 	api "code.gitea.io/gitea/modules/structs"
 	"code.gitea.io/gitea/modules/templates/vars"
+	"code.gitea.io/gitea/modules/timeutil"
 	"code.gitea.io/gitea/modules/upload"
 	"code.gitea.io/gitea/modules/util"
 	"code.gitea.io/gitea/modules/web"
@@ -1762,6 +1764,20 @@ func getActionIssues(ctx *context.Context) []*models.Issue {
 	return issues
 }
 
+// GetIssueInfo get an issue of a repository
+func GetIssueInfo(ctx *context.Context) {
+	issue, err := models.GetIssueWithAttrsByIndex(ctx.Repo.Repository.ID, ctx.ParamsInt64(":index"))
+	if err != nil {
+		if models.IsErrIssueNotExist(err) {
+			ctx.Error(http.StatusNotFound)
+		} else {
+			ctx.Error(http.StatusInternalServerError, "GetIssueByIndex", err.Error())
+		}
+		return
+	}
+	ctx.JSON(http.StatusOK, convert.ToAPIIssue(issue))
+}
+
 // UpdateIssueTitle change issue's title
 func UpdateIssueTitle(ctx *context.Context) {
 	issue := GetActionIssue(ctx)
@@ -1856,6 +1872,40 @@ func UpdateIssueContent(ctx *context.Context) {
 	})
 }
 
+// UpdateIssueDeadline updates an issue deadline
+func UpdateIssueDeadline(ctx *context.Context) {
+	form := web.GetForm(ctx).(*api.EditDeadlineOption)
+	issue, err := models.GetIssueByIndex(ctx.Repo.Repository.ID, ctx.ParamsInt64(":index"))
+	if err != nil {
+		if models.IsErrIssueNotExist(err) {
+			ctx.NotFound("GetIssueByIndex", err)
+		} else {
+			ctx.Error(http.StatusInternalServerError, "GetIssueByIndex", err.Error())
+		}
+		return
+	}
+
+	if !ctx.Repo.CanWriteIssuesOrPulls(issue.IsPull) {
+		ctx.Error(http.StatusForbidden, "", "Not repo writer")
+		return
+	}
+
+	var deadlineUnix timeutil.TimeStamp
+	var deadline time.Time
+	if form.Deadline != nil && !form.Deadline.IsZero() {
+		deadline = time.Date(form.Deadline.Year(), form.Deadline.Month(), form.Deadline.Day(),
+			23, 59, 59, 0, time.Local)
+		deadlineUnix = timeutil.TimeStamp(deadline.Unix())
+	}
+
+	if err := models.UpdateIssueDeadline(issue, deadlineUnix, ctx.Doer); err != nil {
+		ctx.Error(http.StatusInternalServerError, "UpdateIssueDeadline", err.Error())
+		return
+	}
+
+	ctx.JSON(http.StatusCreated, api.IssueDeadline{Deadline: &deadline})
+}
+
 // UpdateIssueMilestone change issue's milestone
 func UpdateIssueMilestone(ctx *context.Context) {
 	issues := getActionIssues(ctx)
@@ -2052,6 +2102,338 @@ func UpdatePullReviewRequest(ctx *context.Context) {
 	})
 }
 
+// SearchIssues searches for issues across the repositories that the user has access to
+func SearchIssues(ctx *context.Context) {
+	before, since, err := context.GetQueryBeforeSince(ctx)
+	if err != nil {
+		ctx.Error(http.StatusUnprocessableEntity, err.Error())
+		return
+	}
+
+	var isClosed util.OptionalBool
+	switch ctx.FormString("state") {
+	case "closed":
+		isClosed = util.OptionalBoolTrue
+	case "all":
+		isClosed = util.OptionalBoolNone
+	default:
+		isClosed = util.OptionalBoolFalse
+	}
+
+	// find repos user can access (for issue search)
+	opts := &models.SearchRepoOptions{
+		Private:     false,
+		AllPublic:   true,
+		TopicOnly:   false,
+		Collaborate: util.OptionalBoolNone,
+		// This needs to be a column that is not nil in fixtures or
+		// MySQL will return different results when sorting by null in some cases
+		OrderBy: db.SearchOrderByAlphabetically,
+		Actor:   ctx.Doer,
+	}
+	if ctx.IsSigned {
+		opts.Private = true
+		opts.AllLimited = true
+	}
+	if ctx.FormString("owner") != "" {
+		owner, err := user_model.GetUserByName(ctx.FormString("owner"))
+		if err != nil {
+			if user_model.IsErrUserNotExist(err) {
+				ctx.Error(http.StatusBadRequest, "Owner not found", err.Error())
+			} else {
+				ctx.Error(http.StatusInternalServerError, "GetUserByName", err.Error())
+			}
+			return
+		}
+		opts.OwnerID = owner.ID
+		opts.AllLimited = false
+		opts.AllPublic = false
+		opts.Collaborate = util.OptionalBoolFalse
+	}
+	if ctx.FormString("team") != "" {
+		if ctx.FormString("owner") == "" {
+			ctx.Error(http.StatusBadRequest, "", "Owner organisation is required for filtering on team")
+			return
+		}
+		team, err := organization.GetTeam(opts.OwnerID, ctx.FormString("team"))
+		if err != nil {
+			if organization.IsErrTeamNotExist(err) {
+				ctx.Error(http.StatusBadRequest, "Team not found", err.Error())
+			} else {
+				ctx.Error(http.StatusInternalServerError, "GetUserByName", err.Error())
+			}
+			return
+		}
+		opts.TeamID = team.ID
+	}
+
+	repoIDs, _, err := models.SearchRepositoryIDs(opts)
+	if err != nil {
+		ctx.Error(http.StatusInternalServerError, "SearchRepositoryByName", err.Error())
+		return
+	}
+
+	var issues []*models.Issue
+	var filteredCount int64
+
+	keyword := ctx.FormTrim("q")
+	if strings.IndexByte(keyword, 0) >= 0 {
+		keyword = ""
+	}
+	var issueIDs []int64
+	if len(keyword) > 0 && len(repoIDs) > 0 {
+		if issueIDs, err = issue_indexer.SearchIssuesByKeyword(ctx, repoIDs, keyword); err != nil {
+			ctx.Error(http.StatusInternalServerError, "SearchIssuesByKeyword", err.Error())
+			return
+		}
+	}
+
+	var isPull util.OptionalBool
+	switch ctx.FormString("type") {
+	case "pulls":
+		isPull = util.OptionalBoolTrue
+	case "issues":
+		isPull = util.OptionalBoolFalse
+	default:
+		isPull = util.OptionalBoolNone
+	}
+
+	labels := ctx.FormTrim("labels")
+	var includedLabelNames []string
+	if len(labels) > 0 {
+		includedLabelNames = strings.Split(labels, ",")
+	}
+
+	milestones := ctx.FormTrim("milestones")
+	var includedMilestones []string
+	if len(milestones) > 0 {
+		includedMilestones = strings.Split(milestones, ",")
+	}
+
+	// this api is also used in UI,
+	// so the default limit is set to fit UI needs
+	limit := ctx.FormInt("limit")
+	if limit == 0 {
+		limit = setting.UI.IssuePagingNum
+	} else if limit > setting.API.MaxResponseItems {
+		limit = setting.API.MaxResponseItems
+	}
+
+	// Only fetch the issues if we either don't have a keyword or the search returned issues
+	// This would otherwise return all issues if no issues were found by the search.
+	if len(keyword) == 0 || len(issueIDs) > 0 || len(includedLabelNames) > 0 || len(includedMilestones) > 0 {
+		issuesOpt := &models.IssuesOptions{
+			ListOptions: db.ListOptions{
+				Page:     ctx.FormInt("page"),
+				PageSize: limit,
+			},
+			RepoIDs:            repoIDs,
+			IsClosed:           isClosed,
+			IssueIDs:           issueIDs,
+			IncludedLabelNames: includedLabelNames,
+			IncludeMilestones:  includedMilestones,
+			SortType:           "priorityrepo",
+			PriorityRepoID:     ctx.FormInt64("priority_repo_id"),
+			IsPull:             isPull,
+			UpdatedBeforeUnix:  before,
+			UpdatedAfterUnix:   since,
+		}
+
+		ctxUserID := int64(0)
+		if ctx.IsSigned {
+			ctxUserID = ctx.Doer.ID
+		}
+
+		// Filter for: Created by User, Assigned to User, Mentioning User, Review of User Requested
+		if ctx.FormBool("created") {
+			issuesOpt.PosterID = ctxUserID
+		}
+		if ctx.FormBool("assigned") {
+			issuesOpt.AssigneeID = ctxUserID
+		}
+		if ctx.FormBool("mentioned") {
+			issuesOpt.MentionedID = ctxUserID
+		}
+		if ctx.FormBool("review_requested") {
+			issuesOpt.ReviewRequestedID = ctxUserID
+		}
+
+		if issues, err = models.Issues(issuesOpt); err != nil {
+			ctx.Error(http.StatusInternalServerError, "Issues", err.Error())
+			return
+		}
+
+		issuesOpt.ListOptions = db.ListOptions{
+			Page: -1,
+		}
+		if filteredCount, err = models.CountIssues(issuesOpt); err != nil {
+			ctx.Error(http.StatusInternalServerError, "CountIssues", err.Error())
+			return
+		}
+	}
+
+	ctx.SetTotalCountHeader(filteredCount)
+	ctx.JSON(http.StatusOK, convert.ToAPIIssueList(issues))
+}
+
+func getUserIDForFilter(ctx *context.Context, queryName string) int64 {
+	userName := ctx.FormString(queryName)
+	if len(userName) == 0 {
+		return 0
+	}
+
+	user, err := user_model.GetUserByName(userName)
+	if user_model.IsErrUserNotExist(err) {
+		ctx.NotFound("", err)
+		return 0
+	}
+
+	if err != nil {
+		ctx.Error(http.StatusInternalServerError, err.Error())
+		return 0
+	}
+
+	return user.ID
+}
+
+// ListIssues list the issues of a repository
+func ListIssues(ctx *context.Context) {
+	before, since, err := context.GetQueryBeforeSince(ctx)
+	if err != nil {
+		ctx.Error(http.StatusUnprocessableEntity, err.Error())
+		return
+	}
+
+	var isClosed util.OptionalBool
+	switch ctx.FormString("state") {
+	case "closed":
+		isClosed = util.OptionalBoolTrue
+	case "all":
+		isClosed = util.OptionalBoolNone
+	default:
+		isClosed = util.OptionalBoolFalse
+	}
+
+	var issues []*models.Issue
+	var filteredCount int64
+
+	keyword := ctx.FormTrim("q")
+	if strings.IndexByte(keyword, 0) >= 0 {
+		keyword = ""
+	}
+	var issueIDs []int64
+	var labelIDs []int64
+	if len(keyword) > 0 {
+		issueIDs, err = issue_indexer.SearchIssuesByKeyword(ctx, []int64{ctx.Repo.Repository.ID}, keyword)
+		if err != nil {
+			ctx.Error(http.StatusInternalServerError, err.Error())
+			return
+		}
+	}
+
+	if splitted := strings.Split(ctx.FormString("labels"), ","); len(splitted) > 0 {
+		labelIDs, err = models.GetLabelIDsInRepoByNames(ctx.Repo.Repository.ID, splitted)
+		if err != nil {
+			ctx.Error(http.StatusInternalServerError, err.Error())
+			return
+		}
+	}
+
+	var mileIDs []int64
+	if part := strings.Split(ctx.FormString("milestones"), ","); len(part) > 0 {
+		for i := range part {
+			// uses names and fall back to ids
+			// non existent milestones are discarded
+			mile, err := models.GetMilestoneByRepoIDANDName(ctx.Repo.Repository.ID, part[i])
+			if err == nil {
+				mileIDs = append(mileIDs, mile.ID)
+				continue
+			}
+			if !models.IsErrMilestoneNotExist(err) {
+				ctx.Error(http.StatusInternalServerError, err.Error())
+				return
+			}
+			id, err := strconv.ParseInt(part[i], 10, 64)
+			if err != nil {
+				continue
+			}
+			mile, err = models.GetMilestoneByRepoID(ctx.Repo.Repository.ID, id)
+			if err == nil {
+				mileIDs = append(mileIDs, mile.ID)
+				continue
+			}
+			if models.IsErrMilestoneNotExist(err) {
+				continue
+			}
+			ctx.Error(http.StatusInternalServerError, err.Error())
+		}
+	}
+
+	listOptions := db.ListOptions{
+		Page:     ctx.FormInt("page"),
+		PageSize: convert.ToCorrectPageSize(ctx.FormInt("limit")),
+	}
+
+	var isPull util.OptionalBool
+	switch ctx.FormString("type") {
+	case "pulls":
+		isPull = util.OptionalBoolTrue
+	case "issues":
+		isPull = util.OptionalBoolFalse
+	default:
+		isPull = util.OptionalBoolNone
+	}
+
+	// FIXME: we should be more efficient here
+	createdByID := getUserIDForFilter(ctx, "created_by")
+	if ctx.Written() {
+		return
+	}
+	assignedByID := getUserIDForFilter(ctx, "assigned_by")
+	if ctx.Written() {
+		return
+	}
+	mentionedByID := getUserIDForFilter(ctx, "mentioned_by")
+	if ctx.Written() {
+		return
+	}
+
+	// Only fetch the issues if we either don't have a keyword or the search returned issues
+	// This would otherwise return all issues if no issues were found by the search.
+	if len(keyword) == 0 || len(issueIDs) > 0 || len(labelIDs) > 0 {
+		issuesOpt := &models.IssuesOptions{
+			ListOptions:       listOptions,
+			RepoIDs:           []int64{ctx.Repo.Repository.ID},
+			IsClosed:          isClosed,
+			IssueIDs:          issueIDs,
+			LabelIDs:          labelIDs,
+			MilestoneIDs:      mileIDs,
+			IsPull:            isPull,
+			UpdatedBeforeUnix: before,
+			UpdatedAfterUnix:  since,
+			PosterID:          createdByID,
+			AssigneeID:        assignedByID,
+			MentionedID:       mentionedByID,
+		}
+
+		if issues, err = models.Issues(issuesOpt); err != nil {
+			ctx.Error(http.StatusInternalServerError, err.Error())
+			return
+		}
+
+		issuesOpt.ListOptions = db.ListOptions{
+			Page: -1,
+		}
+		if filteredCount, err = models.CountIssues(issuesOpt); err != nil {
+			ctx.Error(http.StatusInternalServerError, err.Error())
+			return
+		}
+	}
+
+	ctx.SetTotalCountHeader(filteredCount)
+	ctx.JSON(http.StatusOK, convert.ToAPIIssueList(issues))
+}
+
 // UpdateIssueStatus change issue's status
 func UpdateIssueStatus(ctx *context.Context) {
 	issues := getActionIssues(ctx)
diff --git a/routers/web/repo/repo.go b/routers/web/repo/repo.go
index 989c1a565e..60298121df 100644
--- a/routers/web/repo/repo.go
+++ b/routers/web/repo/repo.go
@@ -20,11 +20,14 @@ import (
 	user_model "code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/modules/base"
 	"code.gitea.io/gitea/modules/context"
+	"code.gitea.io/gitea/modules/convert"
 	"code.gitea.io/gitea/modules/graceful"
 	"code.gitea.io/gitea/modules/log"
 	repo_module "code.gitea.io/gitea/modules/repository"
 	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/modules/storage"
+	api "code.gitea.io/gitea/modules/structs"
+	"code.gitea.io/gitea/modules/util"
 	"code.gitea.io/gitea/modules/web"
 	"code.gitea.io/gitea/services/forms"
 	repo_service "code.gitea.io/gitea/services/repository"
@@ -503,3 +506,112 @@ func InitiateDownload(ctx *context.Context) {
 		"complete": completed,
 	})
 }
+
+// SearchRepo repositories via options
+func SearchRepo(ctx *context.Context) {
+	opts := &models.SearchRepoOptions{
+		ListOptions: db.ListOptions{
+			Page:     ctx.FormInt("page"),
+			PageSize: convert.ToCorrectPageSize(ctx.FormInt("limit")),
+		},
+		Actor:              ctx.Doer,
+		Keyword:            ctx.FormTrim("q"),
+		OwnerID:            ctx.FormInt64("uid"),
+		PriorityOwnerID:    ctx.FormInt64("priority_owner_id"),
+		TeamID:             ctx.FormInt64("team_id"),
+		TopicOnly:          ctx.FormBool("topic"),
+		Collaborate:        util.OptionalBoolNone,
+		Private:            ctx.IsSigned && (ctx.FormString("private") == "" || ctx.FormBool("private")),
+		Template:           util.OptionalBoolNone,
+		StarredByID:        ctx.FormInt64("starredBy"),
+		IncludeDescription: ctx.FormBool("includeDesc"),
+	}
+
+	if ctx.FormString("template") != "" {
+		opts.Template = util.OptionalBoolOf(ctx.FormBool("template"))
+	}
+
+	if ctx.FormBool("exclusive") {
+		opts.Collaborate = util.OptionalBoolFalse
+	}
+
+	mode := ctx.FormString("mode")
+	switch mode {
+	case "source":
+		opts.Fork = util.OptionalBoolFalse
+		opts.Mirror = util.OptionalBoolFalse
+	case "fork":
+		opts.Fork = util.OptionalBoolTrue
+	case "mirror":
+		opts.Mirror = util.OptionalBoolTrue
+	case "collaborative":
+		opts.Mirror = util.OptionalBoolFalse
+		opts.Collaborate = util.OptionalBoolTrue
+	case "":
+	default:
+		ctx.Error(http.StatusUnprocessableEntity, fmt.Sprintf("Invalid search mode: \"%s\"", mode))
+		return
+	}
+
+	if ctx.FormString("archived") != "" {
+		opts.Archived = util.OptionalBoolOf(ctx.FormBool("archived"))
+	}
+
+	if ctx.FormString("is_private") != "" {
+		opts.IsPrivate = util.OptionalBoolOf(ctx.FormBool("is_private"))
+	}
+
+	sortMode := ctx.FormString("sort")
+	if len(sortMode) > 0 {
+		sortOrder := ctx.FormString("order")
+		if len(sortOrder) == 0 {
+			sortOrder = "asc"
+		}
+		if searchModeMap, ok := context.SearchOrderByMap[sortOrder]; ok {
+			if orderBy, ok := searchModeMap[sortMode]; ok {
+				opts.OrderBy = orderBy
+			} else {
+				ctx.Error(http.StatusUnprocessableEntity, fmt.Sprintf("Invalid sort mode: \"%s\"", sortMode))
+				return
+			}
+		} else {
+			ctx.Error(http.StatusUnprocessableEntity, fmt.Sprintf("Invalid sort order: \"%s\"", sortOrder))
+			return
+		}
+	}
+
+	var err error
+	repos, count, err := models.SearchRepository(opts)
+	if err != nil {
+		ctx.JSON(http.StatusInternalServerError, api.SearchError{
+			OK:    false,
+			Error: err.Error(),
+		})
+		return
+	}
+
+	results := make([]*api.Repository, len(repos))
+	for i, repo := range repos {
+		if err = repo.GetOwner(ctx); err != nil {
+			ctx.JSON(http.StatusInternalServerError, api.SearchError{
+				OK:    false,
+				Error: err.Error(),
+			})
+			return
+		}
+		accessMode, err := models.AccessLevel(ctx.Doer, repo)
+		if err != nil {
+			ctx.JSON(http.StatusInternalServerError, api.SearchError{
+				OK:    false,
+				Error: err.Error(),
+			})
+		}
+		results[i] = convert.ToRepo(repo, accessMode)
+	}
+
+	ctx.SetTotalCountHeader(count)
+	ctx.JSON(http.StatusOK, api.SearchResults{
+		OK:   true,
+		Data: results,
+	})
+}
diff --git a/routers/web/user/notification.go b/routers/web/user/notification.go
index 04e987924d..f7848de90a 100644
--- a/routers/web/user/notification.go
+++ b/routers/web/user/notification.go
@@ -15,6 +15,7 @@ import (
 	"code.gitea.io/gitea/modules/base"
 	"code.gitea.io/gitea/modules/context"
 	"code.gitea.io/gitea/modules/setting"
+	api "code.gitea.io/gitea/modules/structs"
 )
 
 const (
@@ -191,3 +192,8 @@ func NotificationPurgePost(c *context.Context) {
 
 	c.Redirect(setting.AppSubURL+"/notifications", http.StatusSeeOther)
 }
+
+// NewAvailable returns the notification counts
+func NewAvailable(ctx *context.APIContext) {
+	ctx.JSON(http.StatusOK, api.NotificationCount{New: models.CountUnread(ctx.Doer)})
+}
diff --git a/routers/web/user/search.go b/routers/web/user/search.go
new file mode 100644
index 0000000000..328c7bade4
--- /dev/null
+++ b/routers/web/user/search.go
@@ -0,0 +1,44 @@
+// Copyright 2022 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 user
+
+import (
+	"net/http"
+
+	"code.gitea.io/gitea/models/db"
+	user_model "code.gitea.io/gitea/models/user"
+	"code.gitea.io/gitea/modules/context"
+	"code.gitea.io/gitea/modules/convert"
+)
+
+// Search search users
+func Search(ctx *context.Context) {
+	listOptions := db.ListOptions{
+		Page:     ctx.FormInt("page"),
+		PageSize: convert.ToCorrectPageSize(ctx.FormInt("limit")),
+	}
+
+	users, maxResults, err := user_model.SearchUsers(&user_model.SearchUserOptions{
+		Actor:       ctx.Doer,
+		Keyword:     ctx.FormTrim("q"),
+		UID:         ctx.FormInt64("uid"),
+		Type:        user_model.UserTypeIndividual,
+		ListOptions: listOptions,
+	})
+	if err != nil {
+		ctx.JSON(http.StatusInternalServerError, map[string]interface{}{
+			"ok":    false,
+			"error": err.Error(),
+		})
+		return
+	}
+
+	ctx.SetTotalCountHeader(maxResults)
+
+	ctx.JSON(http.StatusOK, map[string]interface{}{
+		"ok":   true,
+		"data": convert.ToUsers(ctx.Doer, users),
+	})
+}
diff --git a/routers/web/user/stop_watch.go b/routers/web/user/stop_watch.go
new file mode 100644
index 0000000000..4b16c9aeda
--- /dev/null
+++ b/routers/web/user/stop_watch.go
@@ -0,0 +1,41 @@
+// Copyright 2022 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 user
+
+import (
+	"net/http"
+
+	"code.gitea.io/gitea/models"
+	"code.gitea.io/gitea/models/db"
+	"code.gitea.io/gitea/modules/context"
+	"code.gitea.io/gitea/modules/convert"
+)
+
+// GetStopwatches get all stopwatches
+func GetStopwatches(ctx *context.Context) {
+	sws, err := models.GetUserStopwatches(ctx.Doer.ID, db.ListOptions{
+		Page:     ctx.FormInt("page"),
+		PageSize: convert.ToCorrectPageSize(ctx.FormInt("limit")),
+	})
+	if err != nil {
+		ctx.Error(http.StatusInternalServerError, err.Error())
+		return
+	}
+
+	count, err := models.CountUserStopwatches(ctx.Doer.ID)
+	if err != nil {
+		ctx.Error(http.StatusInternalServerError, err.Error())
+		return
+	}
+
+	apiSWs, err := convert.ToStopWatches(sws)
+	if err != nil {
+		ctx.Error(http.StatusInternalServerError, err.Error())
+		return
+	}
+
+	ctx.SetTotalCountHeader(count)
+	ctx.JSON(http.StatusOK, apiSWs)
+}
diff --git a/routers/web/web.go b/routers/web/web.go
index 3bdedab854..9a2e96aeec 100644
--- a/routers/web/web.go
+++ b/routers/web/web.go
@@ -20,6 +20,7 @@ import (
 	"code.gitea.io/gitea/modules/public"
 	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/modules/storage"
+	"code.gitea.io/gitea/modules/structs"
 	"code.gitea.io/gitea/modules/templates"
 	"code.gitea.io/gitea/modules/validation"
 	"code.gitea.io/gitea/modules/web"
@@ -289,8 +290,13 @@ func RegisterRoutes(m *web.Route) {
 		m.Get("/users", explore.Users)
 		m.Get("/organizations", explore.Organizations)
 		m.Get("/code", explore.Code)
+		m.Get("/topics/search", explore.TopicSearch)
 	}, ignExploreSignIn)
-	m.Get("/issues", reqSignIn, user.Issues)
+	m.Group("/issues", func() {
+		m.Get("", user.Issues)
+		m.Get("/search", repo.SearchIssues)
+	}, reqSignIn)
+
 	m.Get("/pulls", reqSignIn, user.Pulls)
 	m.Get("/milestones", reqSignIn, reqMilestonesDashboardPageEnabled, user.Milestones)
 
@@ -421,6 +427,8 @@ func RegisterRoutes(m *web.Route) {
 		m.Post("/forgot_password", auth.ForgotPasswdPost)
 		m.Post("/logout", auth.SignOut)
 		m.Get("/task/{task}", user.TaskStatus)
+		m.Get("/stopwatches", user.GetStopwatches, reqSignIn)
+		m.Get("/search", user.Search, ignExploreSignIn)
 	})
 	// ***** END: User *****
 
@@ -605,6 +613,7 @@ func RegisterRoutes(m *web.Route) {
 		m.Group("/{org}", func() {
 			m.Get("/teams/new", org.NewTeam)
 			m.Post("/teams/new", bindIgnErr(forms.CreateTeamForm{}), org.NewTeamPost)
+			m.Get("/teams/-/search", org.SearchTeam)
 			m.Get("/teams/{team}/edit", org.EditTeam)
 			m.Post("/teams/{team}/edit", bindIgnErr(forms.CreateTeamForm{}), org.EditTeamPost)
 			m.Post("/teams/{team}/delete", org.DeleteTeam)
@@ -669,6 +678,7 @@ func RegisterRoutes(m *web.Route) {
 			m.Combo("/{repoid}").Get(repo.Fork).
 				Post(bindIgnErr(forms.CreateRepoForm{}), repo.ForkPost)
 		}, context.RepoIDAssignment(), context.UnitTypes(), reqRepoCodeReader)
+		m.Get("/search", repo.SearchRepo)
 	}, reqSignIn)
 
 	m.Group("/{username}/-", func() {
@@ -811,13 +821,16 @@ func RegisterRoutes(m *web.Route) {
 					Post(bindIgnErr(forms.CreateIssueForm{}), repo.NewIssuePost)
 				m.Get("/choose", context.RepoRef(), repo.NewIssueChooseTemplate)
 			})
+			m.Get("/search", repo.ListIssues)
 		}, context.RepoMustNotBeArchived(), reqRepoIssueReader)
 		// FIXME: should use different URLs but mostly same logic for comments of issue and pull request.
 		// So they can apply their own enable/disable logic on routers.
 		m.Group("/{type:issues|pulls}", func() {
 			m.Group("/{index}", func() {
+				m.Get("/info", repo.GetIssueInfo)
 				m.Post("/title", repo.UpdateIssueTitle)
 				m.Post("/content", repo.UpdateIssueContent)
+				m.Post("/deadline", bindIgnErr(structs.EditDeadlineOption{}), repo.UpdateIssueDeadline)
 				m.Post("/watch", repo.IssueWatch)
 				m.Post("/ref", repo.UpdateIssueRef)
 				m.Group("/dependency", func() {
@@ -1195,6 +1208,7 @@ func RegisterRoutes(m *web.Route) {
 		m.Get("", user.Notifications)
 		m.Post("/status", user.NotificationStatusPost)
 		m.Post("/purge", user.NotificationPurgePost)
+		m.Get("/new", user.NewAvailable)
 	}, reqSignIn)
 
 	if setting.API.EnableSwagger {