Add GraphQL API to access workflow tags

The implementations were already done in the previous commits, but the
GraphQL API was not yet exposed. This commit adds the necessary
implementations to expose the workflow tags through the GraphQL API.

It also fixes a bug in `update_workflow_tag` where it fetched a wrong
tag set.

CHANGELOG.md

@@ -11,6 +11,11 @@ Versioning](https://semver.org/spec/v2.0.0.html).
 
 - Add `apply_target_id` field to `Node` struct for reverting node status.
 - Add `apply_in_progress` field to `Node` struct for reverting node status.
+- Added the following GraphQL API to access workflow tags:
+  - 'workflowTagList'
+  - 'insertWorkflowTag'
+  - 'removeWorkflowTag'
+  - 'updateWorkflowTag'
 
 ### Fixed
 

src/graphql.rs

@@ -179,6 +179,7 @@ pub(super) struct Query(
     status::StatusQuery,
     tags::EventTagQuery,
     tags::NetworkTagQuery,
+    tags::WorkflowTagQuery,
     template::TemplateQuery,
     tor_exit_node::TorExitNodeQuery,
     tidb::TidbQuery,
@@ -216,6 +217,7 @@ pub(super) struct Mutation(
     status::StatusMutation,
     tags::EventTagMutation,
     tags::NetworkTagMutation,
+    tags::WorkflowTagMutation,
     template::TemplateMutation,
     tor_exit_node::TorExitNodeMutation,
     tidb::TidbMutation,

src/graphql/tags.rs

@@ -8,6 +8,8 @@ pub(super) use event_tag::EventTagMutation;
 pub(super) use event_tag::EventTagQuery;
 pub(super) use network_tag::NetworkTagMutation;
 pub(super) use network_tag::NetworkTagQuery;
+pub(super) use workflow_tag::WorkflowTagMutation;
+pub(super) use workflow_tag::WorkflowTagQuery;
 
 #[derive(SimpleObject)]
 #[graphql(complex)]

src/graphql/tags/workflow_tag.rs

@@ -22,10 +22,10 @@ impl WorkflowTagQuery {
 }
 
 #[derive(Default)]
-pub(in crate::graphql) struct EventTagMutation;
+pub(in crate::graphql) struct WorkflowTagMutation;
 
 #[Object]
-impl EventTagMutation {
+impl WorkflowTagMutation {
     /// Inserts a new workflow tag, returning the ID of the new tag.
     async fn insert_workflow_tag(&self, ctx: &Context<'_>, name: String) -> Result<ID> {
         let store = crate::graphql::get_store(ctx).await?;
@@ -57,7 +57,7 @@ impl EventTagMutation {
         new: String,
     ) -> Result<bool> {
         let store = crate::graphql::get_store(ctx).await?;
-        let set = store.event_tag_set();
+        let set = store.workflow_tag_set();
         Ok(set.update(id.0.parse()?, old.as_bytes(), new.as_bytes())?)
     }
 }