From 4babf39f3d47289075c56e2ba393d6e524b44359 Mon Sep 17 00:00:00 2001
From: andrewlalis <andrewlalisofficial@gmail.com>
Date: Thu, 7 Aug 2025 19:46:29 -0400
Subject: [PATCH] Added global loader, MyUserPage.

---
 finnow-api/source/api_mapping.d               |  1 +
 finnow-api/source/auth/api.d                  | 11 +++
 finnow-api/source/auth/data.d                 |  1 +
 finnow-api/source/auth/data_impl_fs.d         |  8 ++
 finnow-api/source/auth/service.d              | 13 +++
 web-app/src/App.vue                           |  2 +
 web-app/src/api/auth.ts                       |  6 +-
 web-app/src/api/base.ts                       |  7 ++
 .../src/components/GlobalLoadingOverlay.vue   | 45 +++++++++
 web-app/src/pages/MyUserPage.vue              | 91 +++++++++++++++++++
 web-app/src/pages/UserAccountLayout.vue       |  2 +-
 web-app/src/router/index.ts                   |  6 ++
 web-app/src/util/loader.ts                    | 11 +++
 13 files changed, 202 insertions(+), 2 deletions(-)
 create mode 100644 web-app/src/components/GlobalLoadingOverlay.vue
 create mode 100644 web-app/src/pages/MyUserPage.vue
 create mode 100644 web-app/src/util/loader.ts

diff --git a/finnow-api/source/api_mapping.d b/finnow-api/source/api_mapping.d
index c47bb31..018e8bc 100644
--- a/finnow-api/source/api_mapping.d
+++ b/finnow-api/source/api_mapping.d
@@ -34,6 +34,7 @@ HttpRequestHandler mapApiHandlers() {
 	a.map(HttpMethod.GET, "/me", &getMyUser);
 	a.map(HttpMethod.DELETE, "/me", &deleteMyUser);
 	a.map(HttpMethod.GET, "/me/token", &getNewToken);
+	a.map(HttpMethod.POST, "/me/password", &changeMyPassword);
 
 	import profile.api;
 	a.map(HttpMethod.GET, "/profiles", &handleGetProfiles);
diff --git a/finnow-api/source/auth/api.d b/finnow-api/source/auth/api.d
index 6a3e446..f3e60fd 100644
--- a/finnow-api/source/auth/api.d
+++ b/finnow-api/source/auth/api.d
@@ -90,3 +90,14 @@ void getNewToken(ref ServerHttpRequest request, ref ServerHttpResponse response)
     response.writeBodyString(token);
     infoF!"Generated token for user: %s"(auth.user.username);
 }
+
+struct PasswordChangeRequest {
+    string currentPassword;
+    string newPassword;
+}
+
+void changeMyPassword(ref ServerHttpRequest request, ref ServerHttpResponse response) {
+    AuthContext auth = getAuthContext(request);
+    PasswordChangeRequest data = readJsonBodyAs!PasswordChangeRequest(request);
+    changePassword(auth.user, new FileSystemUserRepository(), data.currentPassword, data.newPassword);
+}
diff --git a/finnow-api/source/auth/data.d b/finnow-api/source/auth/data.d
index b62ce38..4551ab8 100644
--- a/finnow-api/source/auth/data.d
+++ b/finnow-api/source/auth/data.d
@@ -8,4 +8,5 @@ interface UserRepository {
     User[] findAll();
     User createUser(string username, string passwordHash);
     void deleteByUsername(string username);
+    void updatePasswordHash(User user);
 }
diff --git a/finnow-api/source/auth/data_impl_fs.d b/finnow-api/source/auth/data_impl_fs.d
index 73f82d9..deb5007 100644
--- a/finnow-api/source/auth/data_impl_fs.d
+++ b/finnow-api/source/auth/data_impl_fs.d
@@ -58,6 +58,14 @@ class FileSystemUserRepository : UserRepository {
         }
     }
 
+    void updatePasswordHash(User user) {
+        if (!exists(getUserDataFile(user.username))) throw new Exception("User doesn't exist.");
+        JSONValue userObj = parseJSON(readText(getUserDataFile(user.username)));
+        userObj.object["passwordHash"] = JSONValue(user.passwordHash);
+        string jsonStr = userObj.toPrettyString();
+        std.file.write(getUserDataFile(user.username), cast(ubyte[]) jsonStr);
+    }
+
     private string getUserDir(string username) {
         return buildPath(this.usersDir, username);
     }
diff --git a/finnow-api/source/auth/service.d b/finnow-api/source/auth/service.d
index dbf30d2..080bc2d 100644
--- a/finnow-api/source/auth/service.d
+++ b/finnow-api/source/auth/service.d
@@ -20,6 +20,19 @@ void deleteUser(User user, UserRepository repo) {
     repo.deleteByUsername(user.username);
 }
 
+void changePassword(User user, UserRepository repo, string currentPassword, string newPassword) {
+    import secured.kdf;
+    auto verificationResult = verifyPassword(currentPassword, HashedPassword(user.passwordHash), PASSWORD_HASH_PEPPER);
+    if (verificationResult == VerifyPasswordResult.Failure) {
+        throw new HttpStatusException(HttpStatus.FORBIDDEN, "Incorrect password.");
+    }
+    if (currentPassword == newPassword) {
+        throw new HttpStatusException(HttpStatus.BAD_REQUEST, "New password cannot be the same as your current one.");
+    }
+    HashedPassword newHash = securePassword(newPassword, PASSWORD_HASH_PEPPER);
+    repo.updatePasswordHash(User(user.username, newHash.toString()));
+}
+
 /**
  * Generates a new token for a user who's logging in with the given credentials.
  * Params:
diff --git a/web-app/src/App.vue b/web-app/src/App.vue
index 5d9fb7a..d4b3de1 100644
--- a/web-app/src/App.vue
+++ b/web-app/src/App.vue
@@ -1,10 +1,12 @@
 <script setup lang="ts">
 import GlobalAlertModal from './components/GlobalAlertModal.vue';
+import GlobalLoadingOverlay from './components/GlobalLoadingOverlay.vue';
 </script>
 <template>
   <RouterView></RouterView>
 
   <!-- Global alert modal used by util/alert.ts -->
   <GlobalAlertModal id="global-alert-modal" />
+  <GlobalLoadingOverlay id="global-loading-overlay" />
 </template>
 <style scoped></style>
diff --git a/web-app/src/api/auth.ts b/web-app/src/api/auth.ts
index 3bbcbbc..afd84a0 100644
--- a/web-app/src/api/auth.ts
+++ b/web-app/src/api/auth.ts
@@ -25,10 +25,14 @@ export class AuthApiClient extends ApiClient {
   }
 
   async deleteMyUser(): Promise<void> {
-    await super.delete('/me')
+    return await super.delete('/me')
   }
 
   async getNewToken(): Promise<string> {
     return await super.getText('/me/token')
   }
+
+  async changeMyPassword(currentPassword: string, newPassword: string): Promise<void> {
+    return await super.postNoResponse('/me/password', { currentPassword, newPassword })
+  }
 }
diff --git a/web-app/src/api/base.ts b/web-app/src/api/base.ts
index 3819d88..07df891 100644
--- a/web-app/src/api/base.ts
+++ b/web-app/src/api/base.ts
@@ -54,6 +54,13 @@ export abstract class ApiClient {
     return await r.text()
   }
 
+  protected async postNoResponse(
+    path: string,
+    body: object | undefined = undefined,
+  ): Promise<void> {
+    await this.doRequest('POST', path, body)
+  }
+
   protected async delete(path: string): Promise<void> {
     await this.doRequest('DELETE', path)
   }
diff --git a/web-app/src/components/GlobalLoadingOverlay.vue b/web-app/src/components/GlobalLoadingOverlay.vue
new file mode 100644
index 0000000..b4c5065
--- /dev/null
+++ b/web-app/src/components/GlobalLoadingOverlay.vue
@@ -0,0 +1,45 @@
+<!-- A globally-mounted loading overlay controlled by util/loader.ts. -->
+<script setup lang="ts">
+</script>
+<template>
+  <div class="loading-overlay">
+    <div class="loader-indicator"></div>
+  </div>
+</template>
+<style lang="css">
+.loading-overlay {
+  position: fixed;
+  top: 0;
+  left: 0;
+  width: 100%;
+  height: 100%;
+  background: rgba(0, 0, 0, 0.7);
+  display: none;
+  justify-content: center;
+  align-items: center;
+  z-index: 9999;
+}
+
+.loader-indicator {
+  width: 100px;
+  height: 5px;
+  background-color: white;
+  border-radius: 5px;
+  animation: 1s ease-in-out 0s loader-movement;
+  animation-iteration-count: infinite;
+}
+
+@keyframes loader-movement {
+  0% {
+    margin-left: -50%;
+  }
+
+  50% {
+    margin-left: 50%;
+  }
+
+  100% {
+    margin-left: -50%;
+  }
+}
+</style>
diff --git a/web-app/src/pages/MyUserPage.vue b/web-app/src/pages/MyUserPage.vue
new file mode 100644
index 0000000..32f5046
--- /dev/null
+++ b/web-app/src/pages/MyUserPage.vue
@@ -0,0 +1,91 @@
+<script setup lang="ts">
+import { AuthApiClient } from '@/api/auth';
+import { ApiError } from '@/api/base';
+import AppButton from '@/components/AppButton.vue';
+import AppPage from '@/components/AppPage.vue';
+import AppForm from '@/components/form/AppForm.vue';
+import FormControl from '@/components/form/FormControl.vue';
+import FormGroup from '@/components/form/FormGroup.vue';
+import ModalWrapper from '@/components/ModalWrapper.vue';
+import { useAuthStore } from '@/stores/auth-store';
+import { showAlert, showConfirm } from '@/util/alert';
+import { hideLoader, showLoader } from '@/util/loader';
+import { ref, useTemplateRef } from 'vue';
+
+const authStore = useAuthStore()
+
+const changePasswordModal = useTemplateRef('changePasswordModal')
+const currentPassword = ref('')
+const newPassword = ref('')
+
+async function doDeleteUser() {
+  if (await showConfirm('Are you sure you want to delete your account? All data will be permanently deleted.')) {
+    const api = new AuthApiClient()
+    try {
+      await api.deleteMyUser()
+      await showAlert('Your user has been deleted. You will now be logged out.')
+      authStore.onUserLoggedOut()
+    } catch (err) {
+      console.error(err)
+    }
+  }
+}
+
+async function showChangePasswordModal() {
+  await changePasswordModal.value?.show()
+  // Reset password vars to avoid data leakage.
+  currentPassword.value = ''
+  newPassword.value = ''
+}
+
+async function doChangePassword() {
+  changePasswordModal.value?.close()
+  showLoader()
+  const api = new AuthApiClient()
+  try {
+    await api.changeMyPassword(currentPassword.value, newPassword.value)
+    hideLoader()
+    await showAlert('Password has been updated.')
+  } catch (err) {
+    hideLoader()
+    console.error(err)
+    if (err instanceof ApiError) {
+      await showAlert(err.message)
+    }
+  }
+}
+</script>
+<template>
+  <AppPage title="My User">
+    <p>
+      You are logged in as <code>{{ authStore.state?.username }}</code>.
+    </p>
+    <div style="text-align: right;">
+      <AppButton @click="showChangePasswordModal()">Change Password</AppButton>
+      <AppButton @click="doDeleteUser()">Delete My User Account</AppButton>
+    </div>
+
+    <!-- Modal for changing the user's password. -->
+    <ModalWrapper ref="changePasswordModal">
+      <template v-slot:default>
+        <AppForm>
+          <h2>Change Password</h2>
+          <FormGroup>
+            <FormControl label="Current Password">
+              <input type="password" v-model="currentPassword" minlength="8" />
+            </FormControl>
+          </FormGroup>
+          <FormGroup>
+            <FormControl label="New Password">
+              <input type="password" v-model="newPassword" minlength="8" @keydown.enter.prevent="doChangePassword()" />
+            </FormControl>
+          </FormGroup>
+        </AppForm>
+      </template>
+      <template v-slot:buttons>
+        <AppButton @click="doChangePassword()">Change</AppButton>
+        <AppButton button-style="secondary" @click="changePasswordModal?.close()">Cancel</AppButton>
+      </template>
+    </ModalWrapper>
+  </AppPage>
+</template>
diff --git a/web-app/src/pages/UserAccountLayout.vue b/web-app/src/pages/UserAccountLayout.vue
index 88cb055..4a2da6b 100644
--- a/web-app/src/pages/UserAccountLayout.vue
+++ b/web-app/src/pages/UserAccountLayout.vue
@@ -55,7 +55,7 @@ async function checkAuth() {
       </div>
       <div>
         <span class="app-user-widget">
-          Welcome, <em>{{ authStore.state?.username }}</em>
+          Welcome, <RouterLink to="/me" style="color: var(--bg-primary)">{{ authStore.state?.username }}</RouterLink>
         </span>
 
         <span class="app-logout-button" @click="authStore.onUserLoggedOut()">
diff --git a/web-app/src/router/index.ts b/web-app/src/router/index.ts
index 43ac9c6..646bef9 100644
--- a/web-app/src/router/index.ts
+++ b/web-app/src/router/index.ts
@@ -8,6 +8,7 @@ import ProfilesPage from '@/pages/ProfilesPage.vue'
 import { useProfileStore } from '@/stores/profile-store'
 import AccountPage from '@/pages/AccountPage.vue'
 import EditAccountPage from '@/pages/forms/EditAccountPage.vue'
+import MyUserPage from '@/pages/MyUserPage.vue'
 
 const router = createRouter({
   history: createWebHistory(import.meta.env.BASE_URL),
@@ -28,6 +29,11 @@ const router = createRouter({
           meta: { title: 'Home' },
           beforeEnter: profileSelected,
         },
+        {
+          path: 'me',
+          component: async () => MyUserPage,
+          meta: { title: 'My User' },
+        },
         {
           path: 'profiles',
           component: async () => ProfilesPage,
diff --git a/web-app/src/util/loader.ts b/web-app/src/util/loader.ts
new file mode 100644
index 0000000..7004975
--- /dev/null
+++ b/web-app/src/util/loader.ts
@@ -0,0 +1,11 @@
+export function showLoader() {
+  getLoader().style.display = 'flex'
+}
+
+export function hideLoader() {
+  getLoader().style.display = 'none'
+}
+
+function getLoader(): HTMLDivElement {
+  return document.getElementById('global-loading-overlay') as HTMLDivElement
+}