Added initial basic auth scheme.

api/.gitignore

@@ -14,3 +14,5 @@ teacher-tools-api-test-*
 *.o
 *.obj
 *.lst
+
+*.db

api/dub.json

@@ -13,7 +13,7 @@
 	"license": "proprietary",
 	"name": "teacher-tools-api",
 	"stringImportPaths": [
-		"*"
+		"."
 	],
 	"subConfigurations": {
 		"d2sqlite3": "all-included"

api/schema.sql

@@ -0,0 +1,16 @@
+CREATE TABLE user (
+    id INTEGER PRIMARY KEY,
+    username TEXT NOT NULL UNIQUE,
+    password_hash TEXT NOT NULL,
+    created_at INTEGER NOT NULL,
+    is_locked INTEGER NOT NULL,
+    is_admin INTEGER NOT NULL
+);
+
+INSERT INTO user (username, password_hash, created_at, is_locked, is_admin) VALUES (
+    'test',
+    '9F86D081884C7D659A2FEAA0C55AD015A3BF4F1B2B0B822CD15D6C15B0F00A08',
+    1734380300,
+    0,
+    1
+);

api/source/api_modules/auth.d

@@ -0,0 +1,78 @@
+module api_modules.auth;
+
+import handy_httpd;
+import handy_httpd.components.optional;
+import slf4d;
+import d2sqlite3;
+
+import db;
+import data_utils;
+
+struct User {
+    const ulong id;
+    const string username;
+    @Column("password_hash")
+    const string passwordHash;
+    @Column("created_at")
+    const ulong createdAt;
+    @Column("is_locked")
+    const bool isLocked;
+    @Column("is_admin")
+    const bool isAdmin;
+}
+
+struct UserResponse {
+    ulong id;
+    string username;
+    ulong createdAt;
+    bool isLocked;
+    bool isAdmin;
+}
+
+Optional!User getUser(ref HttpRequestContext ctx) {
+    import std.base64;
+    import std.string : startsWith;
+    import std.digest.sha;
+    import std.algorithm : countUntil;
+
+    string headerStr = ctx.request.headers.getFirst("Authorization").orElse("");
+    if (headerStr.length == 0 || !startsWith(headerStr, "Basic ")) {
+        return Optional!User.empty;
+    }
+    string encodedCredentials = headerStr[6..$];
+    string decoded = cast(string) Base64.decode(encodedCredentials);
+    size_t idx = countUntil(decoded, ':');
+    string username = decoded[0..idx];
+    auto passwordHash = toHexString(sha256Of(decoded[idx+1 .. $]));
+    Database db = getDb();
+    Optional!User optUser = findOne!(User)(db, "SELECT * FROM user WHERE username = ?", username);
+    if (!optUser.isNull && optUser.value.passwordHash != passwordHash) {
+        return Optional!User.empty;
+    }
+    return optUser;
+}
+
+User getUserOrThrow(ref HttpRequestContext ctx) {
+    Optional!User optUser = getUser(ctx);
+    if (optUser.isNull) {
+        throw new HttpStatusException(HttpStatus.UNAUTHORIZED, "Invalid credentials.");
+    }
+    return optUser.value;
+}
+
+void loginEndpoint(ref HttpRequestContext ctx) {
+    Optional!User optUser = getUser(ctx);
+    if (optUser.isNull) {
+        ctx.response.status = HttpStatus.UNAUTHORIZED;
+        ctx.response.writeBodyString("Invalid credentials.");
+        return;
+    }
+    infoF!"Login successful for user \"%s\"."(optUser.value.username);
+    writeJsonBody(ctx, UserResponse(
+        optUser.value.id,
+        optUser.value.username,
+        optUser.value.createdAt,
+        optUser.value.isLocked,
+        optUser.value.isAdmin
+    ));
+}

api/source/app.d

@@ -1,6 +1,31 @@
 import handy_httpd;
+import handy_httpd.handlers.path_handler;
+import std.stdio;
+import d2sqlite3;
+
+import db;
+import api_modules.auth;
 
 void main() {
-	HttpServer server = new HttpServer();
+	ServerConfig config;
+	config.enableWebSockets = false;
+	config.port = 8080;
+	config.workerPoolSize = 3;
+
+	config.defaultHeaders["Access-Control-Allow-Origin"] = "*";
+	config.defaultHeaders["Access-Control-Allow-Methods"] = "*";
+	config.defaultHeaders["Access-Control-Request-Method"] = "*";
+	config.defaultHeaders["Access-Control-Allow-Headers"] = "Authorization, Content-Length, Content-Type";
+
+
+	PathHandler handler = new PathHandler();
+	handler.addMapping(Method.OPTIONS, "/api/**", &optionsEndpoint);
+	handler.addMapping(Method.POST, "/api/auth/login", &loginEndpoint);
+
+	HttpServer server = new HttpServer(handler, config);
 	server.start();
 }
+
+void optionsEndpoint(ref HttpRequestContext ctx) {
+	ctx.response.status = HttpStatus.OK;
+}

api/source/data_utils.d

@@ -0,0 +1,40 @@
+module data_utils;
+
+import handy_httpd;
+import asdf;
+
+public import handy_httpd.components.optional;
+
+
+/**
+ * Reads a JSON payload into a type T. Throws an `HttpStatusException` if
+ * the data cannot be read or converted to the given type, with a 400 BAD
+ * REQUEST status.
+ * Params:
+ *   ctx = The request context to read from.
+ * Returns: The data that was read.
+ */
+T readJsonPayload(T)(ref HttpRequestContext ctx) {
+    try {
+        string requestBody = ctx.request.readBodyAsString();
+        return deserialize!T(requestBody);
+    } catch (SerdeException e) {
+        throw new HttpStatusException(HttpStatus.BAD_REQUEST);
+    }
+}
+
+/**
+ * Writes data of type T to a JSON response body. Throws an `HttpStatusException`
+ * with status 501 INTERNAL SERVER ERROR if serialization fails.
+ * Params:
+ *   ctx = The request context to write to.
+ *   data = The data to write.
+ */
+void writeJsonBody(T)(ref HttpRequestContext ctx, in T data) {
+    try {
+        string jsonStr = serializeToJson(data);
+        ctx.response.writeBodyString(jsonStr, "application/json");
+    } catch (SerdeException e) {
+        throw new HttpStatusException(HttpStatus.INTERNAL_SERVER_ERROR);
+    }
+}

api/source/db.d

@@ -0,0 +1,78 @@
+module db;
+
+import std.algorithm;
+import std.array;
+import std.typecons;
+import std.conv;
+
+import d2sqlite3;
+import slf4d;
+import handy_httpd.components.optional;
+
+struct Column {
+    const string name;
+}
+
+Database getDb() {
+    import std.file;
+    bool shouldInitDb = !exists("teacher-tools.db");
+    int flags = SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE;
+    if (d2sqlite3.threadSafe()) {
+        flags |= SQLITE_OPEN_NOMUTEX;
+    }
+    Database db = Database("teacher-tools.db", flags);
+    db.execute("PRAGMA foreign_keys=ON");
+    const string schema = import("schema.sql");
+    if (shouldInitDb) {
+        db.run(schema);
+        info("Initialized database schema.");
+    }
+    return db;
+}
+
+private string[] getColumnNames(T)() {
+    import std.string : toLower;
+    alias members = __traits(allMembers, T);
+    string[members.length] columnNames;
+    static foreach (i; 0 .. members.length) {
+        static if (__traits(getAttributes, __traits(getMember, T, members[i])).length > 0) {
+            columnNames[i] = toLower(__traits(getAttributes, __traits(getMember, T, members[i]))[0].name);
+        } else {
+            columnNames[i] = toLower(members[i]);
+        }
+    }
+    return columnNames.dup;
+}
+
+private string getArgsStr(T)() {
+    import std.traits : RepresentationTypeTuple;
+    alias types = RepresentationTypeTuple!T;
+    string argsStr = "";
+    static foreach (i, type; types) {
+        argsStr ~= "row.peek!(" ~ type.stringof ~ ")(" ~ i.to!string ~ ")";
+        static if (i + 1 < types.length) {
+            argsStr ~= ", ";
+        }
+    }
+    return argsStr;
+}
+
+T parseRow(T)(Row row) {
+    mixin("T t = T(" ~ getArgsStr!T ~ ");");
+    return t;
+}
+
+T[] findAll(T, Args...)(Database db, string query, Args args) {
+    Statement stmt = db.prepare(query);
+    stmt.bindAll(args);
+    ResultRange result = stmt.execute();
+    return result.map!(row => parseRow!T(row)).array;
+}
+
+Optional!T findOne(T, Args...)(Database db, string query, Args args) {
+    Statement stmt = db.prepare(query);
+    stmt.bindAll(args);
+    ResultRange result = stmt.execute();
+    if (result.empty) return Optional!T.empty;
+    return Optional!T.of(parseRow!T(result.front));
+}

app/src/api/auth.ts

@@ -0,0 +1,21 @@
+export interface User {
+  id: number
+  username: string
+  createdAt: Date
+  isLocked: boolean
+  isAdmin: boolean
+}
+
+export async function login(username: string, password: string): Promise<User | null> {
+  const basicAuth = btoa(username + ':' + password)
+  const response = await fetch(import.meta.env.VITE_API_AUTH_URL + '/login', {
+    method: 'POST',
+    headers: {
+      Authorization: 'Basic ' + basicAuth,
+    },
+  })
+  if (!response.ok) {
+    return null
+  }
+  return (await response.json()) as User
+}

app/src/stores/auth.ts

@@ -1,17 +1,19 @@
+import type { User } from '@/api/auth'
 import { defineStore } from 'pinia'
 import { ref, type Ref } from 'vue'
 
 export interface Authenticated {
   username: string
   password: string
+  user: User
 }
 
 export type AuthenticationState = Authenticated | null
 
 export const useAuthStore = defineStore('auth', () => {
   const state: Ref<AuthenticationState> = ref(null)
-  function logIn(username: string, password: string) {
-    state.value = { username: username, password: password }
+  function logIn(username: string, password: string, user: User) {
+    state.value = { username: username, password: password, user: user }
   }
   function logOut() {
     state.value = null

app/src/views/LoginView.vue

@@ -1,4 +1,5 @@
 <script setup lang="ts">
+import { login } from '@/api/auth';
 import { useAuthStore } from '@/stores/auth'
 import { ref, type Ref } from 'vue'
 import { useRouter } from 'vue-router'
@@ -13,9 +14,13 @@ const authStore = useAuthStore()
 const credentials: Ref<Credentials> = ref({ username: '', password: '' })
 
 async function doLogin() {
-  // TODO: Check credentials with the API.
-  authStore.logIn(credentials.value.username, credentials.value.password)
+  const user = await login(credentials.value.username, credentials.value.password)
+  if (user) {
+    authStore.logIn(credentials.value.username, credentials.value.password, user)
     await router.replace('/')
+  } else {
+    console.warn('Invalid credentials.')
+  }
 }
 </script>
 <template>