Add pagination to resources

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

js/src/graphql/resources.ts

@@ -11,7 +11,12 @@ export const RESOURCE_METADATA_BASIC_FIELDS_FRAGMENT = gql`
 `;
 
 export const GET_RESOURCE = gql`
-  query GetResource($path: String!, $username: String!) {
+  query GetResource(
+    $path: String!
+    $username: String!
+    $page: Int
+    $limit: Int
+  ) {
     resource(path: $path, username: $username) {
       id
       title
@@ -38,7 +43,7 @@ export const GET_RESOURCE = gql`
         name
         domain
       }
-      children {
+      children(page: $page, limit: $limit) {
         total
         elements {
           id

js/src/views/Resources/ResourceFolder.vue

@@ -145,6 +145,17 @@
         <p>{{ $t("No resources in this folder") }}</p>
       </div>
     </section>
+    <b-pagination
+      v-if="resource.children.total > RESOURCES_PER_PAGE"
+      :total="resource.children.total"
+      v-model="page"
+      :per-page="RESOURCES_PER_PAGE"
+      :aria-next-label="$t('Next page')"
+      :aria-previous-label="$t('Previous page')"
+      :aria-page-label="$t('Page')"
+      :aria-current-label="$t('Current page')"
+    >
+    </b-pagination>
     <b-modal :active.sync="renameModal" has-modal-card>
       <div class="modal-card">
         <section class="modal-card-body">
@@ -250,6 +261,8 @@ import { IConfig } from "../../types/config.model";
 import ResourceMixin from "../../mixins/resource";
 import ResourceSelector from "../../components/Resource/ResourceSelector.vue";
 import { ApolloCache, FetchResult } from "@apollo/client/core";
+import VueRouter from "vue-router";
+const { isNavigationFailure, NavigationFailureType } = VueRouter;
 
 @Component({
   components: { FolderItem, ResourceItem, Draggable, ResourceSelector },
@@ -265,6 +278,8 @@ import { ApolloCache, FetchResult } from "@apollo/client/core";
         return {
           path,
           username: this.$route.params.preferredUsername,
+          page: this.page,
+          limit: this.RESOURCES_PER_PAGE,
         };
       },
       error({ graphQLErrors }) {
@@ -303,6 +318,8 @@ export default class Resources extends Mixins(ResourceMixin) {
 
   usernameWithDomain = usernameWithDomain;
 
+  RESOURCES_PER_PAGE = 10;
+
   newResource: IResource = {
     title: "",
     summary: "",
@@ -344,6 +361,16 @@ export default class Resources extends Mixins(ResourceMixin) {
 
   mapServiceTypeToIcon = mapServiceTypeToIcon;
 
+  get page(): number {
+    return parseInt((this.$route.query.page as string) || "1", 10);
+  }
+
+  set page(page: number) {
+    this.pushRouter({
+      page: page.toString(),
+    });
+  }
+
   get actualPath(): string {
     const path = Array.isArray(this.$route.params.path)
       ? this.$route.params.path.join("/")
@@ -641,16 +668,51 @@ export default class Resources extends Mixins(ResourceMixin) {
     }
   }
 
+  @Watch("page")
+  loadMoreResources(): void {
+    this.$apollo.queries.resource.fetchMore({
+      // New variables
+      variables: {
+        page: this.page,
+        limit: this.RESOURCES_PER_PAGE,
+      },
+    });
+  }
+
   handleErrors(errors: any[]): void {
     if (errors.some((error) => error.status_code === 404)) {
       this.$router.replace({ name: RouteName.PAGE_NOT_FOUND });
     }
   }
+
+  async pushRouter(args: Record<string, string>): Promise<void> {
+    try {
+      const path = this.filteredPath.toString();
+      const routeName =
+        path === ""
+          ? RouteName.RESOURCE_FOLDER_ROOT
+          : RouteName.RESOURCE_FOLDER;
+
+      await this.$router.push({
+        name: routeName,
+        params: { path },
+        query: { ...this.$route.query, ...args },
+      });
+    } catch (e) {
+      if (isNavigationFailure(e, NavigationFailureType.redirected)) {
+        throw Error(e.toString());
+      }
+    }
+  }
 }
 </script>
 <style lang="scss" scoped>
 .container.section {
   background: $white;
+
+  & > nav.pagination {
+    margin-top: 1rem;
+  }
 }
 
 nav.breadcrumb ul {

lib/graphql/resolvers/resource.ex

@@ -50,7 +50,7 @@ defmodule Mobilizon.GraphQL.Resolvers.Resource do
 
   def find_resources_for_parent(
         %Resource{actor_id: group_id} = parent,
-        _args,
+        %{page: page, limit: limit},
         %{
           context: %{
             current_user: %User{} = user
@@ -59,7 +59,7 @@ defmodule Mobilizon.GraphQL.Resolvers.Resource do
       ) do
     with %Actor{id: actor_id} <- Users.get_actor_for_user(user),
          {:member, true} <- {:member, Actors.is_member?(actor_id, group_id)},
-         %Page{} = page <- Resources.get_resources_for_folder(parent) do
+         %Page{} = page <- Resources.get_resources_for_folder(parent, page, limit) do
       {:ok, page}
     end
   end

lib/graphql/schema/resource.ex

@@ -27,6 +27,14 @@ defmodule Mobilizon.GraphQL.Schema.ResourceType do
 
     field :children, :paginated_resource_list do
       description("Children resources in folder")
+
+      arg(:page, :integer,
+        default_value: 1,
+        description: "The page in the paginated resource list"
+      )
+
+      arg(:limit, :integer, default_value: 10, description: "The limit of resources per page")
+
       resolve(&Resource.find_resources_for_parent/3)
     end
   end