From 67aa15e006580c1de98c6ecc10c4a33d915a72b9 Mon Sep 17 00:00:00 2001
From: Katalina Okano <git@kat.cafe>
Date: Sat, 13 Mar 2021 04:03:42 -0500
Subject: [PATCH] feat(web): add picker saves

---
 packages/web/src/pages/picker.tsx             | 31 +++++++++++++++++--
 .../web/src/utils/roleTransactions.spec.ts    |  0
 packages/web/src/utils/roleTransactions.ts    | 30 ++++++++++++++++++
 3 files changed, 59 insertions(+), 2 deletions(-)
 create mode 100644 packages/web/src/utils/roleTransactions.spec.ts
 create mode 100644 packages/web/src/utils/roleTransactions.ts

diff --git a/packages/web/src/pages/picker.tsx b/packages/web/src/pages/picker.tsx
index 2f23666..2d51c59 100644
--- a/packages/web/src/pages/picker.tsx
+++ b/packages/web/src/pages/picker.tsx
@@ -1,7 +1,8 @@
 import { RolePickerTemplate } from '@roleypoly/design-system/templates/role-picker';
-import { PresentableGuild, UserGuildPermissions } from '@roleypoly/types';
+import { PresentableGuild, RoleUpdate, UserGuildPermissions } from '@roleypoly/types';
 import * as React from 'react';
 import { useSessionContext } from '../session-context/SessionContext';
+import { makeRoleTransactions } from '../utils/roleTransactions';
 
 type PickerProps = {
     serverID: string;
@@ -11,6 +12,7 @@ const Picker = (props: PickerProps) => {
     const { session, authedFetch } = useSessionContext();
 
     const [pickerData, setPickerData] = React.useState<PresentableGuild | null>(null);
+    const [pending, setPending] = React.useState(false);
 
     React.useEffect(() => {
         const fetchPickerData = async () => {
@@ -27,6 +29,31 @@ const Picker = (props: PickerProps) => {
         return <div>Loading...</div>;
     }
 
+    const onSubmit = async (submittedRoles: string[]) => {
+        if (pending === true) {
+            return;
+        }
+
+        setPending(true);
+        const updatePayload: RoleUpdate = {
+            knownState: pickerData.member.roles,
+            transactions: makeRoleTransactions(pickerData.member.roles, submittedRoles),
+        };
+
+        const response = await authedFetch(`/update-roles/${props.serverID}`, {
+            method: 'PATCH',
+            body: JSON.stringify(updatePayload),
+        });
+        if (response.status === 200) {
+            setPickerData({
+                ...pickerData,
+                member: { ...pickerData.member, roles: (await response.json()).roles },
+            });
+        }
+
+        setPending(false);
+    };
+
     return (
         <RolePickerTemplate
             activeGuildId={props.serverID}
@@ -36,8 +63,8 @@ const Picker = (props: PickerProps) => {
             guildData={pickerData.data}
             member={pickerData.member}
             roles={pickerData.roles}
-            onSubmit={(args) => console.log('onSubmit', ...args)}
             editable={pickerData.guild.permissionLevel > UserGuildPermissions.User}
+            onSubmit={onSubmit}
         />
     );
 };
diff --git a/packages/web/src/utils/roleTransactions.spec.ts b/packages/web/src/utils/roleTransactions.spec.ts
new file mode 100644
index 0000000..e69de29
diff --git a/packages/web/src/utils/roleTransactions.ts b/packages/web/src/utils/roleTransactions.ts
new file mode 100644
index 0000000..174b181
--- /dev/null
+++ b/packages/web/src/utils/roleTransactions.ts
@@ -0,0 +1,30 @@
+import { Role, RoleTransaction, TransactionType } from '@roleypoly/types';
+
+export const makeRoleTransactions = (
+    oldRoles: Role['id'][],
+    newRoles: Role['id'][]
+): RoleTransaction[] => {
+    const transactions: RoleTransaction[] = [];
+
+    // Removes: old roles not in new roles
+    for (let oldID of oldRoles) {
+        if (!newRoles.includes(oldID)) {
+            transactions.push({
+                id: oldID,
+                action: TransactionType.Remove,
+            });
+        }
+    }
+
+    // Adds: new roles not in old roles
+    for (let newID of newRoles) {
+        if (!oldRoles.includes(newID)) {
+            transactions.push({
+                id: newID,
+                action: TransactionType.Add,
+            });
+        }
+    }
+
+    return transactions;
+};