feat(frontend): Add ogranization invitation

legalconsenthub/composables/useBetterAuth.ts

@@ -40,10 +40,81 @@ export function useBetterAuth() {
     )
   }
 
+  async function getInvitation(invitationId: string): Promise<CustomInvitation> {
+    return authClient.organization.getInvitation({
+      query: { id: invitationId },
+      fetchOptions: {
+        throw: true,
+        onSuccess: (ctx) => {
+          return ctx.data
+        },
+        onError: (error) => {
+          toast.add({ title: 'Fehler beim Einladen', description: error.error.message, color: 'error' })
+        }
+      }
+    })
+  }
+
+  async function inviteMember(email: string, role: 'member' | 'admin') {
+    await authClient.organization.inviteMember({
+      email,
+      role,
+      fetchOptions: {
+        throw: true,
+        onSuccess: (ctx) => {
+          if (activeOrganization.value) {
+            activeOrganization.value = {
+              ...activeOrganization.value,
+              invitations: [...(activeOrganization.value?.invitations || []), ctx.data]
+            }
+          }
+        },
+        onError: (error) => {
+          toast.add({ title: 'Fehler beim Einladen', description: error.error.message, color: 'error' })
+        }
+      }
+    })
+  }
+
+  async function acceptInvitation(invitationId: string) {
+    await authClient.organization.acceptInvitation({
+      invitationId,
+      fetchOptions: {
+        throw: true,
+        onSuccess: async () => {
+          toast.add({ title: 'Invitation accepted', color: 'success' })
+          await navigateTo('/')
+        },
+        onError: (ctx) => {
+          toast.add({ title: 'Error when accepting invitation', description: ctx.error.message, color: 'error' })
+        }
+      }
+    })
+  }
+
+  async function rejectInvitation(invitationId: string) {
+    await authClient.organization.rejectInvitation({
+      invitationId,
+      fetchOptions: {
+        throw: true,
+        onSuccess: () => {
+          toast.add({ title: 'Invitation rejected', color: 'success' })
+        },
+        onError: (ctx) => {
+          toast.add({ title: 'Error when rejecting invitation', description: ctx.error.message, color: 'error' })
+        }
+      }
+    })
+  }
+
   return {
     activeOrganization,
     selectedOrgId,
     createOrganization,
-    deleteOrganization
+    deleteOrganization,
+    getInvitation,
+    inviteMember,
+    acceptInvitation,
+    rejectInvitation
   }
 }