fix: re-add support for resource object-linkage for relationships (#552)

* Adding sub relationships for routes with 4 subpaths

* test(kitsu): add coverage for fetching relationships of a resource

* ci(codeclimate): move public identifier into workflow

PRs from forks do not have access to the secret variable.

According to CodeClimate, this is a public read-only token and doesn't need to be kept secret: https://docs.codeclimate.com/docs/finding-your-test-coverage-token#should-i-keep-my-test-reporter-id-secret

* docs: fix jsdoc syntax

Co-authored-by: wopian <wopian@wopian.me>

Author: koji98

packages/kitsu/src/get.spec.js

@@ -92,6 +92,24 @@ describe('kitsu', () => {
       expect(request).toEqual(getSingleWithNestedIncludes.kitsu)
     })
 
+    it('fetches relationships of a resource', async () => {
+      expect.assertions(1)
+      const response = {
+        links: {
+          self: 'https://api.example/media-relationships/1/relationships/destination',
+          related: 'https://api.example/media-relationships/1/destination'
+        },
+        data: {
+          type: 'anime',
+          id: '1'
+        }
+      }
+      const api = new Kitsu()
+      mock.onGet('media-relationships/1/relationships/destination').reply(200, response)
+      const request = await api.get('media-relationships/1/relationships/destination')
+      expect(request).toEqual(response)
+    })
+
     it('returns a JSON:API error object for invalid queries', async () => {
       expect.assertions(5)
       const api = new Kitsu()

packages/kitsu/src/index.js

@@ -197,11 +197,12 @@ export default class Kitsu {
    */
   async get (model, params = {}, headers = {}) {
     try {
-      const [ res, id, relationship ] = model.split('/')
+      const [ res, id, relationship, subRelationship ] = model.split('/')
 
       let url = this.plural(this.resCase(res))
       if (id) url += `/${id}`
       if (relationship) url += `/${this.resCase(relationship)}`
+      if (subRelationship) url += `/${this.resCase(subRelationship)}`
 
       const { data } = await this.axios.get(url, {
         params,