CountIssues counts issues by options.

DeleteRepoIssueIndexer deletes repo's all issues indexes.

InitIssueIndexer initialize issue indexer, syncReindex is true then reindex until all issue index done.

IsAvailable checks if issue indexer is available.

SearchIssues search issues by options.

UpdateIssueIndexer add/update an issue to the issue indexer.

UpdateRepoIndexer add/update all issues of the repositories.

IndexerMetadata is used to send data to the queue, so it contains only the ids.

SearchOptions indicates the options for searching issues.