http: adds php api routes under do/

http/public/do/verify_otp.php

@@ -0,0 +1,63 @@
+<?php
+
+use JoeacNet\Http\Db;
+
+require_once __DIR__ . "/../../php/db.php";
+
+$db = Db\connectDb();
+
+$payload = json_decode(file_get_contents("php://input"), true);
+$guess = getGuessFromPayloadAndValidate($payload);
+$leniencySecs = getLeniencySecsFromPayloadAndValidate($payload);
+$userId = getUserIdFromPayloadAndValidate($payload);
+
+if (
+  !Db\isOtpCorrect(
+    db: $db,
+    userId: $userId,
+    guess: $guess,
+    leniencySecs: $leniencySecs,
+  )
+) {
+  http_response_code(400);
+  echo "OTP is not valid";
+  exit();
+}
+Db\deleteAllOtpsForUser($db, $userId);
+$token = bin2hex(random_bytes(256));
+Db\insertSendEmailToken(db: $db, userId: $userId, token: $token);
+http_response_code(200);
+echo $token;
+exit();
+
+/// functions ///
+
+function getGuessFromPayloadAndValidate(array $payload): string
+{
+  $guess = (string) $payload["guess"];
+  if (strlen($guess) != 6) {
+    http_response_code(400);
+    echo "guess must be six characters long";
+    exit();
+  }
+  return $guess;
+}
+
+function getLeniencySecsFromPayloadAndValidate(array $payload): int
+{
+  if ((bool) $payload["lenient"] ?? false) {
+    return 60;
+  }
+  return 0;
+}
+
+function getUserIdFromPayloadAndValidate(array $payload): string
+{
+  $userId = (string) $payload["userId"];
+  if (is_null($userId) || $userId == "") {
+    http_response_code(400);
+    echo "userId must not be empty";
+    exit();
+  }
+  return $userId;
+}