Move issues related files into models/issues (#19931)

* Move access and repo permission to models/perm/access

* fix test

* fix git test

* Move functions sequence

* Some improvements per @KN4CK3R and @delvh

* Move issues related code to models/issues

* Move some issues related sub package

* Merge

* Fix test

* Fix test

* Fix test

* Fix test

* Rename some files

models/issues/issue_watch_test.go

@@ -0,0 +1,68 @@
+// 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 issues_test
+
+import (
+	"testing"
+
+	"code.gitea.io/gitea/models/db"
+	issues_model "code.gitea.io/gitea/models/issues"
+	"code.gitea.io/gitea/models/unittest"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestCreateOrUpdateIssueWatch(t *testing.T) {
+	assert.NoError(t, unittest.PrepareTestDatabase())
+
+	assert.NoError(t, issues_model.CreateOrUpdateIssueWatch(3, 1, true))
+	iw := unittest.AssertExistsAndLoadBean(t, &issues_model.IssueWatch{UserID: 3, IssueID: 1}).(*issues_model.IssueWatch)
+	assert.True(t, iw.IsWatching)
+
+	assert.NoError(t, issues_model.CreateOrUpdateIssueWatch(1, 1, false))
+	iw = unittest.AssertExistsAndLoadBean(t, &issues_model.IssueWatch{UserID: 1, IssueID: 1}).(*issues_model.IssueWatch)
+	assert.False(t, iw.IsWatching)
+}
+
+func TestGetIssueWatch(t *testing.T) {
+	assert.NoError(t, unittest.PrepareTestDatabase())
+
+	_, exists, err := issues_model.GetIssueWatch(db.DefaultContext, 9, 1)
+	assert.True(t, exists)
+	assert.NoError(t, err)
+
+	iw, exists, err := issues_model.GetIssueWatch(db.DefaultContext, 2, 2)
+	assert.True(t, exists)
+	assert.NoError(t, err)
+	assert.False(t, iw.IsWatching)
+
+	_, exists, err = issues_model.GetIssueWatch(db.DefaultContext, 3, 1)
+	assert.False(t, exists)
+	assert.NoError(t, err)
+}
+
+func TestGetIssueWatchers(t *testing.T) {
+	assert.NoError(t, unittest.PrepareTestDatabase())
+
+	iws, err := issues_model.GetIssueWatchers(db.DefaultContext, 1, db.ListOptions{})
+	assert.NoError(t, err)
+	// Watcher is inactive, thus 0
+	assert.Len(t, iws, 0)
+
+	iws, err = issues_model.GetIssueWatchers(db.DefaultContext, 2, db.ListOptions{})
+	assert.NoError(t, err)
+	// Watcher is explicit not watching
+	assert.Len(t, iws, 0)
+
+	iws, err = issues_model.GetIssueWatchers(db.DefaultContext, 5, db.ListOptions{})
+	assert.NoError(t, err)
+	// Issue has no Watchers
+	assert.Len(t, iws, 0)
+
+	iws, err = issues_model.GetIssueWatchers(db.DefaultContext, 7, db.ListOptions{})
+	assert.NoError(t, err)
+	// Issue has one watcher
+	assert.Len(t, iws, 1)
+}