refactor: Update auth_email_passwordless and auth_email_password to use the new flows proposed

modules/auth_email_password/module.json

@@ -26,26 +26,16 @@
     "fromName": "Authentication Code"
   },
   "scripts": {
-    "send_verification": {
-      "name": "Send Email Verification",
-      "description": "Send a one-time verification code to an email address to verify ownership.",
-      "public": true
-    },
-    "sign_in_email_pass": {
-      "name": "Sign In with Email and Password",
-      "description": "Sign in a user with an email and password.",
-      "public": true
-    },
-    "verify_sign_up_email_pass": {
-      "name": "Verify and Sign Up with Email and Password",
-      "description": "Sign up a new user with an email and password.",
-      "public": true
-    },
-    "verify_add_email_pass": {
-      "name": "Verify and Add Email and Password to existing user",
-      "description": "Verify a user's email address and register it with an existing account. Requires a password.",
-      "public": true
-    }
+		"sign_in": {
+			"name": "Sign In",
+			"description": "Initiates a verification flow with an intended action attached. Returns a token to reference that verification/action.",
+			"public": true
+		},
+		"verify_code": {
+			"name": "Verify Code",
+			"description": "Verifies ownership of an email and executes the intended action. May error if action is not able to be taken.",
+			"public": true
+		}
   },
   "errors": {
     "verification_code_invalid": {

modules/auth_email_password/scripts/sign_in.ts

@@ -0,0 +1,77 @@
+import { Empty, Module, RuntimeError, ScriptContext, UnreachableError } from "../module.gen.ts";
+import { ensureNotAssociated, ensureNotAssociatedAll } from "../utils/link_assertions.ts";
+import { IDENTITY_INFO_PASSWORD } from "../utils/provider.ts";
+
+interface ConnectRequest {
+	connectEmail: {
+		userToken: string;
+	};
+}
+interface SignInRequest {
+	signIn: {
+		createUser: boolean;
+	};
+}
+interface SignUpRequest {
+	signUp: Empty;
+}
+export type Request = { email: string, password: string } & (ConnectRequest | SignInRequest | SignUpRequest);
+
+export interface Response {
+	token: string;
+}
+
+const HOUR_MS = 60 * 60 * 1000;
+const ATTEMPTS = 3;
+
+export async function run(ctx: ScriptContext, req: Request): Promise<Response> {
+	let verificationData: unknown;
+	if ("connectEmail" in req) {
+		const { userId } = await ctx.modules.users.authenticateToken({
+			userToken: req.connectEmail.userToken,
+		});
+
+		if (await ctx.modules.userPasswords.meta({ userId })) {
+			await ctx.modules.userPasswords.verify({ userId, password: req.password });
+			await ensureNotAssociatedAll(ctx, req.email, new Set());
+			verificationData = { email: req.email, connect: userId, createdAt: new Date().toISOString() };
+		} else {
+			const newHash = Module.userPasswords.prehash(req.password);
+			verificationData = { email: req.email, newHash, connect: userId };
+		}
+	} else if ("signIn" in req) {
+		try {
+			const { userId } = await ctx.modules.identities.signIn({
+				info: IDENTITY_INFO_PASSWORD,
+				uniqueData: { identifier: req.email },
+			});
+
+			await ctx.modules.userPasswords.verify({ userId, password: req.password });
+
+			verificationData = { email: req.email, signIn: userId, createdAt: new Date().toISOString() };
+		} catch (e) {
+			if (!(e instanceof RuntimeError) || e.code !== "identity_provider_not_found") {
+				throw e;
+			}
+			if (!req.signIn.createUser) throw new RuntimeError("email_unregistered");
+
+			await ensureNotAssociatedAll(ctx, req.email, new Set());
+			const newHash = Module.userPasswords.prehash(req.password);
+			verificationData = { email: req.email, signUp: true, newHash };
+		}
+	} else if ("signUp" in req) {
+		await ensureNotAssociatedAll(ctx, req.email, new Set());
+		const newHash = Module.userPasswords.prehash(req.password);
+		verificationData = { email: req.email, signUp: true, newHash };
+	} else {
+		throw new UnreachableError(req);
+	}
+
+	const { token } = await ctx.modules.verifications.create({
+		data: verificationData,
+		expireAt: new Date(Date.now() + HOUR_MS).toISOString(),
+		maxAttempts: ATTEMPTS,
+	});
+
+	return { token };
+}