Allow admins to view user email (#3261)

apps/frontend/src/pages/admin/user_email.vue

@@ -0,0 +1,61 @@
+<template>
+  <div class="normal-page no-sidebar">
+    <h1>User account request</h1>
+    <div class="normal-page__content">
+      <div class="card flex flex-col gap-3">
+        <div class="flex flex-col gap-2">
+          <label for="name">
+            <span class="text-lg font-semibold text-contrast">
+              User email
+              <span class="text-brand-red">*</span>
+            </span>
+          </label>
+          <input
+            id="name"
+            v-model="userEmail"
+            type="email"
+            maxlength="64"
+            :placeholder="`Enter user email...`"
+            autocomplete="off"
+          />
+        </div>
+        <div class="flex gap-2">
+          <ButtonStyled color="brand">
+            <button @click="getUserFromEmail">
+              <MailIcon aria-hidden="true" />
+              Get user account
+            </button>
+          </ButtonStyled>
+        </div>
+      </div>
+    </div>
+  </div>
+</template>
+<script setup lang="ts">
+import { ButtonStyled } from "@modrinth/ui";
+import { MailIcon } from "@modrinth/assets";
+
+const userEmail = ref("");
+
+async function getUserFromEmail() {
+  startLoading();
+
+  try {
+    const result = await useBaseFetch(`user_email?email=${encodeURIComponent(userEmail.value)}`, {
+      method: "GET",
+      apiVersion: 3,
+    });
+
+    await navigateTo(`/user/${result.username}`);
+  } catch (err) {
+    console.error(err);
+    addNotification({
+      group: "main",
+      title: "An error occurred",
+      text: err.data.description,
+      type: "error",
+    });
+  }
+  stopLoading();
+}
+</script>

apps/labrinth/src/routes/v3/users.rs

@@ -28,6 +28,7 @@ use crate::{
 pub fn config(cfg: &mut web::ServiceConfig) {
     cfg.route("user", web::get().to(user_auth_get));
     cfg.route("users", web::get().to(users_get));
+    cfg.route("user_email", web::get().to(admin_user_email));
 
     cfg.service(
         web::scope("user")
@@ -44,6 +45,62 @@ pub fn config(cfg: &mut web::ServiceConfig) {
     );
 }
 
+#[derive(Deserialize)]
+pub struct UserEmailQuery {
+    pub email: String,
+}
+
+pub async fn admin_user_email(
+    req: HttpRequest,
+    pool: web::Data<PgPool>,
+    redis: web::Data<RedisPool>,
+    session_queue: web::Data<AuthQueue>,
+    email: web::Query<UserEmailQuery>,
+) -> Result<HttpResponse, ApiError> {
+    let user = get_user_from_headers(
+        &req,
+        &**pool,
+        &redis,
+        &session_queue,
+        Some(&[Scopes::SESSION_ACCESS]),
+    )
+    .await
+    .map(|x| x.1)?;
+
+    if !user.role.is_admin() {
+        return Err(ApiError::CustomAuthentication(
+            "You do not have permission to get a user from their email!"
+                .to_string(),
+        ));
+    }
+
+    let user_id = sqlx::query!(
+        "
+        SELECT id FROM users
+        WHERE LOWER(email) = LOWER($1)
+        ",
+        email.email
+    )
+    .fetch_optional(&**pool)
+    .await?
+    .map(|x| x.id)
+    .ok_or_else(|| {
+        ApiError::InvalidInput(
+            "The email provided is not associated with a user!".to_string(),
+        )
+    })?;
+
+    let user =
+        User::get_id(crate::database::models::UserId(user_id), &**pool, &redis)
+            .await?;
+
+    if let Some(user) = user {
+        Ok(HttpResponse::Ok().json(user))
+    } else {
+        Err(ApiError::NotFound)
+    }
+}
+
 pub async fn projects_list(
     req: HttpRequest,
     info: web::Path<(String,)>,