feat: Add create issue API

lib/integrations/linear/processor_service.rb

@@ -20,6 +20,13 @@ class Integrations::Linear::ProcessorService
     }
   end
 
+  def create_issue(team_id, title, description)
+    response = linear_client.create_issue(team_id, title, description)
+    return response if response[:error]
+
+    response
+  end
+
   private
 
   def linear_hook

lib/linear.rb

@@ -27,6 +27,14 @@ class Linear
     execute_query(LinearQueries.team_entites_query(team_id))
   end
 
+  def create_issue(team_id, title, description)
+    raise ArgumentError, 'Missing team id' if team_id.blank?
+    raise ArgumentError, 'Missing title' if title.blank?
+    raise ArgumentError, 'Missing description' if description.blank?
+
+    execute_mutation(LinearMutations::ISSUE_CREATE, input: { teamId: team_id, title: title, description: description })
+  end
+
   private
 
   def execute_query(query)
@@ -41,6 +49,12 @@ class Linear
     log_and_return_error("Unexpected Error: #{e.message}")
   end
 
+  def execute_mutation(query, variables)
+    response = @client.query(query, variables: variables)
+    log_and_return_error("Error creating issue: #{response.errors.messages}") if response.data.nil? && response.errors.any?
+    response.data.to_h
+  end
+
   def log_and_return_error(message)
     Rails.logger.error message
     { error: message }

lib/linear_mutations.rb

@@ -0,0 +1,15 @@
+module LinearMutations
+  ISSUE_CREATE = <<~GRAPHQL.freeze
+    mutation IssueCreate($input: IssueCreateInput!) {
+      issueCreate(
+        input: $input
+      ) {
+        success
+        issue {
+          id
+          title
+        }
+      }
+    }
+  GRAPHQL
+end