1 files changed, 42 insertions, 0 deletions
diff --git a/src/services/graphql/topics.ts b/src/services/graphql/topics.ts
new file mode 100644
index 0000000..0f59bad
--- /dev/null
+++ b/src/services/graphql/topics.ts
@@ -0,0 +1,42 @@
+import { RawTopicPreview, TotalItems } from '@ts/types/raw-data';
+import { EdgesResponse, EdgesVars, fetchAPI, getAPIUrl } from './api';
+import { topicsListQuery, totalTopicsQuery } from './topics.query';
+
+/**
+ * Retrieve the total number of topics.
+ *
+ * @returns {Promise<number>} - The topics total number.
+ */
+export const getTotalTopics = async (): Promise<number> => {
+  const response = await fetchAPI<TotalItems, typeof totalTopicsQuery>({
+    api: getAPIUrl(),
+    query: totalTopicsQuery,
+  });
+
+  return response.topics.pageInfo.total;
+};
+
+/**
+ * Retrieve the given number of topics from API.
+ *
+ * @param {EdgesVars} props - An object of GraphQL variables.
+ * @returns {Promise<EdgesResponse<RawTopicPreview>>} The topics data.
+ */
+export const getTopicsPreview = async (
+  props: EdgesVars
+): Promise<EdgesResponse<RawTopicPreview>> => {
+  const response = await fetchAPI<RawTopicPreview, typeof topicsListQuery>({
+    api: getAPIUrl(),
+    query: topicsListQuery,
+    variables: props,
+  });
+
+  return response.topics;
+};
+
+export const getAllTopicsLinks = async () => {
+  const allTopics = [];
+  const initialTopics = await getTopicsPreview({ first: 1 });
+
+  if (!initialTopics.pageInfo.hasNextPage) return initialTopics;
+};