Fix discussion list page showing empty content when not a member

Introduce the EmptyContent component to display an empty content message

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

js/src/components/Utils/EmptyContent.vue

@@ -0,0 +1,37 @@
+<template>
+  <div class="empty-content" :class="{ inline }" role="note">
+    <b-icon :icon="icon" size="is-large" />
+    <h2 class="empty-content__title">
+      <!-- @slot Mandatory title -->
+      <slot />
+    </h2>
+    <p v-show="$slots.desc">
+      <!-- @slot Optional description -->
+      <slot name="desc" />
+    </p>
+  </div>
+</template>
+<script lang="ts">
+import { Component, Prop, Vue } from "vue-property-decorator";
+
+@Component
+export default class EmptyContent extends Vue {
+  @Prop({ type: String, required: true }) icon!: string;
+  @Prop({ type: Boolean, required: false, default: false }) inline!: boolean;
+}
+</script>
+
+<style lang="scss">
+.empty-content {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  margin-top: 20vh;
+  &__title {
+    margin-bottom: 10px;
+  }
+  &.inline {
+    margin-top: 5vh;
+  }
+}
+</style>

js/src/views/Discussions/DiscussionsList.vue

@@ -27,7 +27,7 @@
         </li>
       </ul>
     </nav>
-    <section>
+    <section v-if="isCurrentActorAGroupMember">
       <p>
         {{
           $t(
@@ -39,7 +39,7 @@
         tag="router-link"
         :to="{
           name: RouteName.CREATE_DISCUSSION,
-          params: { preferredUsername: this.preferredUsername },
+          params: { preferredUsername },
         }"
         >{{ $t("New discussion") }}</b-button
       >
@@ -50,18 +50,38 @@
           :key="discussion.id"
         />
       </div>
+      <empty-content v-else icon="chat">
+        {{ $t("There's no discussions yet") }}
+      </empty-content>
+    </section>
+    <section class="section" v-else>
+      <empty-content icon="chat">
+        {{ $t("Only group members can access discussions") }}
+        <template #desc>
+          <router-link
+            :to="{ name: RouteName.GROUP, params: { preferredUsername } }"
+          >
+            {{ $t("Return to the group page") }}
+          </router-link>
+        </template>
+      </empty-content>
     </section>
   </div>
 </template>
 <script lang="ts">
 import { Component, Prop, Vue } from "vue-property-decorator";
 import { FETCH_GROUP } from "@/graphql/group";
-import { IGroup, usernameWithDomain } from "@/types/actor";
+import { IActor, IGroup, IPerson, usernameWithDomain } from "@/types/actor";
 import DiscussionListItem from "@/components/Discussion/DiscussionListItem.vue";
 import RouteName from "../../router/name";
+import { MemberRole } from "@/types/enums";
+import { CURRENT_ACTOR_CLIENT, PERSON_MEMBERSHIPS } from "@/graphql/actor";
+import { GROUP_MEMBERSHIP_SUBSCRIPTION_CHANGED } from "@/graphql/event";
+import { IMember } from "@/types/actor/member.model";
+import EmptyContent from "@/components/Utils/EmptyContent.vue";
 
 @Component({
-  components: { DiscussionListItem },
+  components: { DiscussionListItem, EmptyContent },
   apollo: {
     group: {
       query: FETCH_GROUP,
@@ -75,6 +95,30 @@ import RouteName from "../../router/name";
         return !this.preferredUsername;
       },
     },
+    person: {
+      query: PERSON_MEMBERSHIPS,
+      fetchPolicy: "cache-and-network",
+      variables() {
+        return {
+          id: this.currentActor.id,
+        };
+      },
+      subscribeToMore: {
+        document: GROUP_MEMBERSHIP_SUBSCRIPTION_CHANGED,
+        variables() {
+          return {
+            actorId: this.currentActor.id,
+          };
+        },
+        skip() {
+          return !this.currentActor || !this.currentActor.id;
+        },
+      },
+      skip() {
+        return !this.currentActor || !this.currentActor.id;
+      },
+    },
+    currentActor: CURRENT_ACTOR_CLIENT,
   },
   metaInfo() {
     return {
@@ -89,11 +133,36 @@ import RouteName from "../../router/name";
 export default class DiscussionsList extends Vue {
   @Prop({ type: String, required: true }) preferredUsername!: string;
 
+  person!: IPerson;
+
   group!: IGroup;
 
+  currentActor!: IActor;
+
   RouteName = RouteName;
 
   usernameWithDomain = usernameWithDomain;
+
+  get groupMemberships(): (string | undefined)[] {
+    if (!this.person || !this.person.id) return [];
+    return this.person.memberships.elements
+      .filter(
+        (membership: IMember) =>
+          ![
+            MemberRole.REJECTED,
+            MemberRole.NOT_APPROVED,
+            MemberRole.INVITED,
+          ].includes(membership.role)
+      )
+      .map(({ parent: { id } }) => id);
+  }
+
+  get isCurrentActorAGroupMember(): boolean {
+    return (
+      this.groupMemberships !== undefined &&
+      this.groupMemberships.includes(this.group.id)
+    );
+  }
 }
 </script>
 <style lang="scss">

js/src/views/Group/GroupMembers.vue

@@ -218,11 +218,9 @@
           </div>
         </b-table-column>
         <template slot="empty">
-          <section class="section">
-            <div class="content has-text-grey has-text-centered">
-              <p>{{ $t("No member matches the filters") }}</p>
-            </div>
-          </section>
+          <empty-content icon="account" inline>
+            {{ $t("No member matches the filters") }}
+          </empty-content>
         </template>
       </b-table>
     </section>
@@ -247,6 +245,7 @@ import {
   UPDATE_MEMBER,
 } from "../../graphql/member";
 import { usernameWithDomain } from "../../types/actor";
+import EmptyContent from "@/components/Utils/EmptyContent.vue";
 
 @Component({
   apollo: {
@@ -263,6 +262,9 @@ import { usernameWithDomain } from "../../types/actor";
       update: (data) => data.group.members,
     },
   },
+  components: {
+    EmptyContent,
+  },
 })
 export default class GroupMembers extends mixins(GroupMixin) {
   loading = true;