Allow cross-repository dependencies on issues (#7901)

* in progress changes for #7405, added ability to add cross-repo dependencies

* removed unused repolink var

* fixed query that was breaking ci tests; fixed check in issue dependency add so that the id of the issue and dependency is checked rather than the indexes

* reverted removal of string in local files becasue these are done via crowdin, not updated manually

* removed 'Select("issue.*")' from getBlockedByDependencies and getBlockingDependencies based on comments in PR review

* changed getBlockedByDependencies and getBlockingDependencies to use a more xorm-like query, also updated the sidebar as a result

* simplified the getBlockingDependencies and getBlockedByDependencies methods; changed the sidebar to show the dependencies in a different format where you can see the name of the repository

* made some changes to the issue view in the dependencies (issue name on top, repo full name on separate line). Change view of issue in the dependency search results (also showing the full repo name on separate line)

* replace call to FindUserAccessibleRepoIDs with SearchRepositoryByName. The former was hardcoded to use isPrivate = false on the repo search, but this code needed it to be true. The SearchRepositoryByName method is used more in the code including on the user's dashboard

* some more tweaks to the layout of the issues when showing dependencies and in the search box when you add new dependencies

* added Name to the RepositoryMeta struct

* updated swagger doc

* fixed total count for link header on SearchIssues

* fixed indentation

* fixed aligment of remove icon on dependencies in issue sidebar

* removed unnecessary nil check (unnecessary because issue.loadRepo is called prior to this block)

* reverting .css change, somehow missed or forgot that less is used

* updated less file and generated css; updated sidebar template with styles to line up delete and issue index

* added ordering to the blocked by/depends on queries

* fixed sorting in issue dependency search and the depends on/blocks views to show issues from the current repo first, then by created date descending; added a "all cross repository dependencies" setting to allow this feature to be turned off, if turned off, the issue dependency search will work the way it did before (restricted to the current repository)

* re-applied my swagger changes after merge

* fixed split string condition in issue search

* changed ALLOW_CROSS_REPOSITORY_DEPENDENCIES description to sound more global than just the issue dependency search; returning 400 in the cross repo issue search api method if not enabled; fixed bug where the issue count did not respect the state parameter

* when adding a dependency to an issue, added a check to make sure the issue and dependency are in the same repo if cross repo dependencies is not enabled

* updated sortIssuesSession call in PullRequests, another commit moved this method from pull.go to pull_list.go so I had to re-apply my change here

* fixed incorrect setting of user id parameter in search repos call

4 files changed, 53 insertions, 20 deletions

diff --git a/models/issue.go b/models/issue.go
index 17205cc2fa..78413468b2 100644
--- a/models/issue.go
+++ b/models/issue.go
@@ -9,6 +9,7 @@ import (
 	"path"
 	"regexp"
 	"sort"
+	"strconv"
 	"strings"
 
 	"code.gitea.io/gitea/modules/base"
@@ -378,6 +379,12 @@ func (issue *Issue) apiFormat(e Engine) *api.Issue {
 		Updated:  issue.UpdatedUnix.AsTime(),
 	}
 
+	apiIssue.Repo = &api.RepositoryMeta{
+		ID:       issue.Repo.ID,
+		Name:     issue.Repo.Name,
+		FullName: issue.Repo.FullName(),
+	}
+
 	if issue.ClosedUnix != 0 {
 		apiIssue.Closed = issue.ClosedUnix.AsTimePtr()
 	}
@@ -1047,11 +1054,13 @@ type IssuesOptions struct {
 	LabelIDs    []int64
 	SortType    string
 	IssueIDs    []int64
+	// prioritize issues from this repo
+	PriorityRepoID int64
 }
 
 // sortIssuesSession sort an issues-related session based on the provided
 // sortType string
-func sortIssuesSession(sess *xorm.Session, sortType string) {
+func sortIssuesSession(sess *xorm.Session, sortType string, priorityRepoID int64) {
 	switch sortType {
 	case "oldest":
 		sess.Asc("issue.created_unix")
@@ -1069,6 +1078,8 @@ func sortIssuesSession(sess *xorm.Session, sortType string) {
 		sess.Asc("issue.deadline_unix")
 	case "farduedate":
 		sess.Desc("issue.deadline_unix")
+	case "priorityrepo":
+		sess.OrderBy("CASE WHEN issue.repo_id = " + strconv.FormatInt(priorityRepoID, 10) + " THEN 1 ELSE 2 END, issue.created_unix DESC")
 	default:
 		sess.Desc("issue.created_unix")
 	}
@@ -1170,7 +1181,7 @@ func Issues(opts *IssuesOptions) ([]*Issue, error) {
 	defer sess.Close()
 
 	opts.setupSession(sess)
-	sortIssuesSession(sess, opts.SortType)
+	sortIssuesSession(sess, opts.SortType, opts.PriorityRepoID)
 
 	issues := make([]*Issue, 0, setting.UI.IssuePagingNum)
 	if err := sess.Find(&issues); err != nil {
@@ -1476,8 +1487,8 @@ func GetRepoIssueStats(repoID, uid int64, filterMode int, isPull bool) (numOpen
 }
 
 // SearchIssueIDsByKeyword search issues on database
-func SearchIssueIDsByKeyword(kw string, repoID int64, limit, start int) (int64, []int64, error) {
-	var repoCond = builder.Eq{"repo_id": repoID}
+func SearchIssueIDsByKeyword(kw string, repoIDs []int64, limit, start int) (int64, []int64, error) {
+	var repoCond = builder.In("repo_id", repoIDs)
 	var subQuery = builder.Select("id").From("issue").Where(repoCond)
 	var cond = builder.And(
 		repoCond,
@@ -1566,33 +1577,43 @@ func UpdateIssueDeadline(issue *Issue, deadlineUnix timeutil.TimeStamp, doer *Us
 	return sess.Commit()
 }
 
+// DependencyInfo represents high level information about an issue which is a dependency of another issue.
+type DependencyInfo struct {
+	Issue      `xorm:"extends"`
+	Repository `xorm:"extends"`
+}
+
 // Get Blocked By Dependencies, aka all issues this issue is blocked by.
-func (issue *Issue) getBlockedByDependencies(e Engine) (issueDeps []*Issue, err error) {
+func (issue *Issue) getBlockedByDependencies(e Engine) (issueDeps []*DependencyInfo, err error) {
 	return issueDeps, e.
-		Table("issue_dependency").
-		Select("issue.*").
-		Join("INNER", "issue", "issue.id = issue_dependency.dependency_id").
+		Table("issue").
+		Join("INNER", "repository", "repository.id = issue.repo_id").
+		Join("INNER", "issue_dependency", "issue_dependency.dependency_id = issue.id").
 		Where("issue_id = ?", issue.ID).
+		//sort by repo id then created date, with the issues of the same repo at the beginning of the list
+		OrderBy("CASE WHEN issue.repo_id = " + strconv.FormatInt(issue.RepoID, 10) + " THEN 0 ELSE issue.repo_id END, issue.created_unix DESC").
 		Find(&issueDeps)
 }
 
 // Get Blocking Dependencies, aka all issues this issue blocks.
-func (issue *Issue) getBlockingDependencies(e Engine) (issueDeps []*Issue, err error) {
+func (issue *Issue) getBlockingDependencies(e Engine) (issueDeps []*DependencyInfo, err error) {
 	return issueDeps, e.
-		Table("issue_dependency").
-		Select("issue.*").
-		Join("INNER", "issue", "issue.id = issue_dependency.issue_id").
+		Table("issue").
+		Join("INNER", "repository", "repository.id = issue.repo_id").
+		Join("INNER", "issue_dependency", "issue_dependency.issue_id = issue.id").
 		Where("dependency_id = ?", issue.ID).
+		//sort by repo id then created date, with the issues of the same repo at the beginning of the list
+		OrderBy("CASE WHEN issue.repo_id = " + strconv.FormatInt(issue.RepoID, 10) + " THEN 0 ELSE issue.repo_id END, issue.created_unix DESC").
 		Find(&issueDeps)
 }
 
 // BlockedByDependencies finds all Dependencies an issue is blocked by
-func (issue *Issue) BlockedByDependencies() ([]*Issue, error) {
+func (issue *Issue) BlockedByDependencies() ([]*DependencyInfo, error) {
 	return issue.getBlockedByDependencies(x)
 }
 
 // BlockingDependencies returns all blocking dependencies, aka all other issues a given issue blocks
-func (issue *Issue) BlockingDependencies() ([]*Issue, error) {
+func (issue *Issue) BlockingDependencies() ([]*DependencyInfo, error) {
 	return issue.getBlockingDependencies(x)
 }
 
diff --git a/models/issue_label.go b/models/issue_label.go
index 1fc873cfd4..497756af5b 100644
--- a/models/issue_label.go
+++ b/models/issue_label.go
@@ -250,6 +250,19 @@ func GetLabelIDsInRepoByNames(repoID int64, labelNames []string) ([]int64, error
 		Find(&labelIDs)
 }
 
+// GetLabelIDsInReposByNames returns a list of labelIDs by names in one of the given
+// repositories.
+// it silently ignores label names that do not belong to the repository.
+func GetLabelIDsInReposByNames(repoIDs []int64, labelNames []string) ([]int64, error) {
+	labelIDs := make([]int64, 0, len(labelNames))
+	return labelIDs, x.Table("label").
+		In("repo_id", repoIDs).
+		In("name", labelNames).
+		Asc("name").
+		Cols("id").
+		Find(&labelIDs)
+}
+
 // GetLabelInRepoByID returns a label by ID in given repository.
 func GetLabelInRepoByID(repoID, labelID int64) (*Label, error) {
 	return getLabelInRepoByID(x, repoID, labelID)
diff --git a/models/issue_test.go b/models/issue_test.go
index 592a0e3d77..d16c1de25d 100644
--- a/models/issue_test.go
+++ b/models/issue_test.go
@@ -264,24 +264,23 @@ func TestIssue_loadTotalTimes(t *testing.T) {
 
 func TestIssue_SearchIssueIDsByKeyword(t *testing.T) {
 	assert.NoError(t, PrepareTestDatabase())
-
-	total, ids, err := SearchIssueIDsByKeyword("issue2", 1, 10, 0)
+	total, ids, err := SearchIssueIDsByKeyword("issue2", []int64{1}, 10, 0)
 	assert.NoError(t, err)
 	assert.EqualValues(t, 1, total)
 	assert.EqualValues(t, []int64{2}, ids)
 
-	total, ids, err = SearchIssueIDsByKeyword("first", 1, 10, 0)
+	total, ids, err = SearchIssueIDsByKeyword("first", []int64{1}, 10, 0)
 	assert.NoError(t, err)
 	assert.EqualValues(t, 1, total)
 	assert.EqualValues(t, []int64{1}, ids)
 
-	total, ids, err = SearchIssueIDsByKeyword("for", 1, 10, 0)
+	total, ids, err = SearchIssueIDsByKeyword("for", []int64{1}, 10, 0)
 	assert.NoError(t, err)
 	assert.EqualValues(t, 4, total)
 	assert.EqualValues(t, []int64{1, 2, 3, 5}, ids)
 
 	// issue1's comment id 2
-	total, ids, err = SearchIssueIDsByKeyword("good", 1, 10, 0)
+	total, ids, err = SearchIssueIDsByKeyword("good", []int64{1}, 10, 0)
 	assert.NoError(t, err)
 	assert.EqualValues(t, 1, total)
 	assert.EqualValues(t, []int64{1}, ids)
diff --git a/models/pull_list.go b/models/pull_list.go
index 4ec6fdde3b..2c2f53f4a1 100644
--- a/models/pull_list.go
+++ b/models/pull_list.go
@@ -87,7 +87,7 @@ func PullRequests(baseRepoID int64, opts *PullRequestsOptions) ([]*PullRequest,
 
 	prs := make([]*PullRequest, 0, ItemsPerPage)
 	findSession, err := listPullRequestStatement(baseRepoID, opts)
-	sortIssuesSession(findSession, opts.SortType)
+	sortIssuesSession(findSession, opts.SortType, 0)
 	if err != nil {
 		log.Error("listPullRequestStatement: %v", err)
 		return nil, maxResults, err