Refactor authors dropdown (send get request from frontend to avoid long wait time) (#23890)

Right now the authors search dropdown might take a long time to load if
amount of authors is huge.
Example: (In the video below, there are about 10000 authors, and it
takes about 10 seconds to open the author dropdown)

https://user-images.githubusercontent.com/17645053/229422229-98aa9656-3439-4f8c-9f4e-83bd8e2a2557.mov

Possible improvements can be made, which will take 2 steps (Thanks to
@wolfogre for advice):

Step 1：
Backend: Add a new api, which returns a limit of 30 posters with matched
prefix.
Frontend: Change the search behavior from frontend search(fomantic
search) to backend search(when input is changed, send a request to get
authors matching the current search prefix)

Step 2：
Backend: Optimize the api in step 1 using indexer to support fuzzy
search.

This PR is implements the first step. The main changes:
1. Added api: `GET /{type:issues|pulls}/posters` , which return a limit
of 30 users with matched prefix (prefix sent as query). If
`DEFAULT_SHOW_FULL_NAME` in `custom/conf/app.ini` is set to true, will
also include fullnames fuzzy search.
2. Added a tooltip saying "Shows a maximum of 30 users" to the author
search dropdown
3. Change the search behavior from frontend search to backend search

After:

https://user-images.githubusercontent.com/17645053/229430960-f88fafd8-fd5d-4f84-9df2-2677539d5d08.mov

Fixes: https://github.com/go-gitea/gitea/issues/22586

---------

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: silverwind <me@silverwind.io>

3 files changed, 19 insertions, 21 deletions

diff --git a/templates/repo/issue/list.tmpl b/templates/repo/issue/list.tmpl
index cfc9a93048..06cc3aba91 100644
--- a/templates/repo/issue/list.tmpl
+++ b/templates/repo/issue/list.tmpl
@@ -1,5 +1,5 @@
 {{template "base/head" .}}
-<div role="main" aria-label="{{.Title}}" class="page-content repository">
+<div role="main" aria-label="{{.Title}}" class="page-content repository issue-list">
 	{{template "repo/header" .}}
 	<div class="ui container">
 		<div class="ui three column grid issue-list-headers">
@@ -117,7 +117,11 @@
 					</div>
 
 					<!-- Author -->
-					<div class="ui {{if not .Posters}}disabled{{end}} dropdown jump item">
+					<div class="ui dropdown jump item user-remote-search" data-tooltip-content="{{.locale.Tr "repo.author_search_tooltip"}}"
+						data-search-url="{{$.Link}}/posters"
+						data-selected-user-id="{{$.PosterID}}"
+						data-action-jump-url="{{$.Link}}?type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{$.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={user_id}"
+					>
 						<span class="text">
 							{{.locale.Tr "repo.issues.filter_poster"}}
 							{{svg "octicon-triangle-down" 14 "dropdown icon"}}
@@ -127,12 +131,7 @@
 								<i class="icon gt-df gt-ac gt-jc">{{svg "octicon-search" 16}}</i>
 								<input type="text" placeholder="{{.locale.Tr "repo.issues.filter_poster"}}">
 							</div>
-							<a class="item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}">{{.locale.Tr "repo.issues.filter_poster_no_select"}}</a>
-							{{range .Posters}}
-								<a class="{{if eq $.PosterID .ID}}active selected{{end}} item gt-df" href="{{$.Link}}?type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{$.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{.ID}}">
-									{{avatar $.Context .}}{{template "repo/search_name" .}}
-								</a>
-							{{end}}
+							<a class="item" data-value="0">{{.locale.Tr "repo.issues.filter_poster_no_select"}}</a>
 						</div>
 					</div>
 
@@ -150,7 +149,7 @@
 							<a class="item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&poster={{$.PosterID}}">{{.locale.Tr "repo.issues.filter_assginee_no_select"}}</a>
 							{{range .Assignees}}
 								<a class="{{if eq $.AssigneeID .ID}}active selected{{end}} item gt-df" href="{{$.Link}}?type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{$.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{.ID}}&poster={{$.PosterID}}">
-									{{avatar $.Context .}}{{template "repo/search_name" .}}
+									{{avatar $.Context . 20}}{{template "repo/search_name" .}}
 								</a>
 							{{end}}
 						</div>
@@ -299,7 +298,7 @@
 							</div>
 							{{range .Assignees}}
 								<div class="item issue-action" data-element-id="{{.ID}}" data-url="{{$.RepoLink}}/issues/assignee">
-									{{avatar $.Context .}} {{.GetDisplayName}}
+									{{avatar $.Context . 20}} {{.GetDisplayName}}
 								</div>
 							{{end}}
 						</div>
diff --git a/templates/repo/issue/milestone_issues.tmpl b/templates/repo/issue/milestone_issues.tmpl
index 2ca2fa2bce..148a23db66 100644
--- a/templates/repo/issue/milestone_issues.tmpl
+++ b/templates/repo/issue/milestone_issues.tmpl
@@ -1,5 +1,5 @@
 {{template "base/head" .}}
-<div role="main" aria-label="{{.Title}}" class="page-content repository">
+<div role="main" aria-label="{{.Title}}" class="page-content repository milestone-issue-list">
 	{{template "repo/header" .}}
 	<div class="ui container">
 		<div class="ui two column stackable grid">
@@ -71,7 +71,11 @@
 					</div>
 
 					<!-- Author -->
-					<div class="ui {{if not .Posters}}disabled{{end}} dropdown jump item">
+					<div class="ui dropdown jump item user-remote-search" data-tooltip-content="{{.locale.Tr "repo.author_search_tooltip"}}"
+						data-search-url="{{$.RepoLink}}/issues/posters"
+						data-selected-user-id="{{$.PosterID}}"
+						data-action-jump-url="{{$.Link}}?type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{$.SelectLabels}}&assignee={{$.AssigneeID}}&poster={user_id}"
+					>
 						<span class="text">
 							{{.locale.Tr "repo.issues.filter_poster"}}
 							{{svg "octicon-triangle-down" 14 "dropdown icon"}}
@@ -81,12 +85,7 @@
 								<i class="icon gt-df gt-ac gt-jc">{{svg "octicon-search" 16}}</i>
 								<input type="text" placeholder="{{.locale.Tr "repo.issues.filter_poster"}}">
 							</div>
-							<a class="item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{.SelectLabels}}&assignee={{$.AssigneeID}}">{{.locale.Tr "repo.issues.filter_poster_no_select"}}</a>
-							{{range .Posters}}
-								<a class="{{if eq $.PosterID .ID}}active selected{{end}} item" href="{{$.Link}}?type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{$.SelectLabels}}&assignee={{$.AssigneeID}}&poster={{.ID}}">
-									{{avatar $.Context .}}{{template "repo/search_name" .}}
-								</a>
-							{{end}}
+							<a class="item" data-value="0">{{.locale.Tr "repo.issues.filter_poster_no_select"}}</a>
 						</div>
 					</div>
 
@@ -104,7 +103,7 @@
 							<a class="item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{.SelectLabels}}&poster={{$.PosterID}}">{{.locale.Tr "repo.issues.filter_assginee_no_select"}}</a>
 							{{range .Assignees}}
 								<a class="{{if eq $.AssigneeID .ID}}active selected{{end}} item" href="{{$.Link}}?type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{$.SelectLabels}}&assignee={{.ID}}&poster={{$.PosterID}}">
-									{{avatar $.Context . 28 "gt-mr-2"}}{{template "repo/search_name" .}}
+									{{avatar $.Context . 20}}{{template "repo/search_name" .}}
 								</a>
 							{{end}}
 						</div>
@@ -190,7 +189,7 @@
 							</div>
 							{{range .Assignees}}
 								<div class="item issue-action" data-element-id="{{.ID}}" data-url="{{$.RepoLink}}/issues/assignee">
-									{{avatar $.Context . 28 "gt-mr-2"}}
+									{{avatar $.Context . 20}}
 									{{.GetDisplayName}}
 								</div>
 							{{end}}
diff --git a/templates/repo/issue/view_content/sidebar.tmpl b/templates/repo/issue/view_content/sidebar.tmpl
index 25df29e5fb..521d6ba1d3 100644
--- a/templates/repo/issue/view_content/sidebar.tmpl
+++ b/templates/repo/issue/view_content/sidebar.tmpl
@@ -254,7 +254,7 @@
 						{{end}}
 						<span class="octicon-check {{if not $checked}}invisible{{end}}">{{svg "octicon-check"}}</span>
 						<span class="text">
-							{{avatar $.Context . 28 "gt-mr-3"}}{{template "repo/search_name" .}}
+							{{avatar $.Context . 20 "gt-mr-3"}}{{template "repo/search_name" .}}
 						</span>
 					</a>
 				{{end}}