[API] Add more filters to issues search (#13514)

* Add time filter for issue search

* Add limit option for paggination

* Add Filter for: Created by User, Assigned to User, Mentioning User

* update swagger

* Add Tests for limit, before & since

1 files changed, 24 insertions, 5 deletions

diff --git a/integrations/api_issue_test.go b/integrations/api_issue_test.go
index 9311d50c5c..81e5c44873 100644
--- a/integrations/api_issue_test.go
+++ b/integrations/api_issue_test.go
@@ -9,6 +9,7 @@ import (
 	"net/http"
 	"net/url"
 	"testing"
+	"time"
 
 	"code.gitea.io/gitea/models"
 	api "code.gitea.io/gitea/modules/structs"
@@ -152,17 +153,27 @@ func TestAPISearchIssues(t *testing.T) {
 	resp := session.MakeRequest(t, req, http.StatusOK)
 	var apiIssues []*api.Issue
 	DecodeJSON(t, resp, &apiIssues)
-
 	assert.Len(t, apiIssues, 10)
 
-	query := url.Values{}
-	query.Add("token", token)
+	query := url.Values{"token": {token}}
 	link.RawQuery = query.Encode()
 	req = NewRequest(t, "GET", link.String())
 	resp = session.MakeRequest(t, req, http.StatusOK)
 	DecodeJSON(t, resp, &apiIssues)
 	assert.Len(t, apiIssues, 10)
 
+	since := "2000-01-01T00%3A50%3A01%2B00%3A00" // 946687801
+	before := time.Unix(999307200, 0).Format(time.RFC3339)
+	query.Add("since", since)
+	query.Add("before", before)
+	link.RawQuery = query.Encode()
+	req = NewRequest(t, "GET", link.String())
+	resp = session.MakeRequest(t, req, http.StatusOK)
+	DecodeJSON(t, resp, &apiIssues)
+	assert.Len(t, apiIssues, 8)
+	query.Del("since")
+	query.Del("before")
+
 	query.Add("state", "closed")
 	link.RawQuery = query.Encode()
 	req = NewRequest(t, "GET", link.String())
@@ -175,14 +186,22 @@ func TestAPISearchIssues(t *testing.T) {
 	req = NewRequest(t, "GET", link.String())
 	resp = session.MakeRequest(t, req, http.StatusOK)
 	DecodeJSON(t, resp, &apiIssues)
+	assert.EqualValues(t, "12", resp.Header().Get("X-Total-Count"))
 	assert.Len(t, apiIssues, 10) //there are more but 10 is page item limit
 
-	query.Add("page", "2")
+	query.Add("limit", "20")
 	link.RawQuery = query.Encode()
 	req = NewRequest(t, "GET", link.String())
 	resp = session.MakeRequest(t, req, http.StatusOK)
 	DecodeJSON(t, resp, &apiIssues)
-	assert.Len(t, apiIssues, 2)
+	assert.Len(t, apiIssues, 12)
+
+	query = url.Values{"assigned": {"true"}, "state": {"all"}}
+	link.RawQuery = query.Encode()
+	req = NewRequest(t, "GET", link.String())
+	resp = session.MakeRequest(t, req, http.StatusOK)
+	DecodeJSON(t, resp, &apiIssues)
+	assert.Len(t, apiIssues, 1)
 }
 
 func TestAPISearchIssuesWithLabels(t *testing.T) {