form: modularize captcha somewhat

ts/form.ts

@@ -4,6 +4,7 @@ import { _get, _post, toggleLoader, addLoader, removeLoader, toDateString } from
 import { loadLangSelector } from "./modules/lang.js";
 import { Validator, ValidatorConf, ValidatorRespDTO } from "./modules/validator.js";
 import { Discord, Telegram, Matrix, ServiceConfiguration, MatrixConfiguration } from "./modules/account-linking.js";
+import { Captcha } from "./modules/captcha.js";
 
 interface formWindow extends Window {
     invalidPassword: string;
@@ -172,35 +173,7 @@ if (!window.usernameEnabled) { usernameField.parentElement.remove(); usernameFie
 const passwordField = document.getElementById("create-password") as HTMLInputElement;
 const rePasswordField = document.getElementById("create-reenter-password") as HTMLInputElement;
 
-let captchaVerified = false;
+let captcha = new Captcha(window.code, window.captcha, window.reCAPTCHA);
-let captchaID = "";
-let captchaInput = document.getElementById("captcha-input") as HTMLInputElement;
-const captchaCheckbox = document.getElementById("captcha-success") as HTMLSpanElement;
-let prevCaptcha = "";
-
-let baseValidator = (oncomplete: (valid: boolean) => void): void => {
-    if (window.captcha && !window.reCAPTCHA && (captchaInput.value != prevCaptcha)) {
-        prevCaptcha = captchaInput.value;
-        _post("/captcha/verify/" + window.code + "/" + captchaID + "/" + captchaInput.value, null, (req: XMLHttpRequest) => {
-            if (req.readyState == 4) {
-                if (req.status == 204) {
-                    captchaCheckbox.innerHTML = `<i class="ri-check-line"></i>`;
-                    captchaCheckbox.classList.add("~positive");
-                    captchaCheckbox.classList.remove("~critical");
-                    captchaVerified = true;
-                } else {
-                    captchaCheckbox.innerHTML = `<i class="ri-close-line"></i>`;
-                    captchaCheckbox.classList.add("~critical");
-                    captchaCheckbox.classList.remove("~positive");
-                    captchaVerified = false;
-                }
-                _baseValidator(oncomplete, captchaVerified);
-            }
-        });
-    } else {
-        _baseValidator(oncomplete, captchaVerified);
-    }
-}
 
 function _baseValidator(oncomplete: (valid: boolean) => void, captchaValid: boolean): void {
     if (window.emailRequired) {
@@ -228,6 +201,8 @@ function _baseValidator(oncomplete: (valid: boolean) => void, captchaValid: bool
     oncomplete(true);
 }
 
+let baseValidator = captcha.baseValidatorWrapper(_baseValidator); 
+
 interface GreCAPTCHA {
     render: (container: HTMLDivElement, parameters: {
         sitekey?: string,
@@ -273,29 +248,15 @@ interface sendDTO {
     captcha_text?: string;
 }
 
-const genCaptcha = () => {
-    _get("/captcha/gen/"+window.code, null, (req: XMLHttpRequest) => {
-        if (req.readyState == 4) {
-            if (req.status == 200) {
-                captchaID = req.response["id"];
-                document.getElementById("captcha-img").innerHTML = `
-                <img class="w-100" src="${window.location.toString().substring(0, window.location.toString().lastIndexOf("/invite"))}/captcha/img/${window.code}/${captchaID}"></img>
-                `;
-                captchaInput.value = "";
-            }
-        }
-    });
-};
-
 if (window.captcha && !window.reCAPTCHA) {
-    genCaptcha();
+    captcha.generate();
-    (document.getElementById("captcha-regen") as HTMLSpanElement).onclick = genCaptcha;
+    (document.getElementById("captcha-regen") as HTMLSpanElement).onclick = captcha.generate;
-    captchaInput.onkeyup = validator.validate;
+    captcha.input.onkeyup = validator.validate;
 }
 
 const create = (event: SubmitEvent) => {
     event.preventDefault();
-    if (window.captcha && !window.reCAPTCHA && !captchaVerified) {
+    if (window.captcha && !window.reCAPTCHA && !captcha.verified) {
         
     }
     addLoader(submitSpan);
@@ -330,8 +291,8 @@ const create = (event: SubmitEvent) => {
         if (window.reCAPTCHA) {
             send.captcha_text = grecaptcha.getResponse();
         } else {
-            send.captcha_id = captchaID;
+            send.captcha_id = captcha.captchaID;
-            send.captcha_text = captchaInput.value;
+            send.captcha_text = captcha.input.value;
         }
     }
     _post("/newUser", send, (req: XMLHttpRequest) => {

ts/modules/captcha.ts

@@ -0,0 +1,64 @@
+import { _get, _post } from "./common.js";
+
+export class Captcha {
+    enabled = true;
+    verified = false;
+    captchaID = "";
+    input = document.getElementById("captcha-input") as HTMLInputElement;
+    checkbox = document.getElementById("captcha-success") as HTMLSpanElement;
+    previous = "";
+    reCAPTCHA = false;
+    code = "";
+
+    get value(): string { return this.input.value; }
+
+    hasChanged = (): boolean => { return this.value != this.previous; }
+
+    baseValidatorWrapper = (_baseValidator: (oncomplete: (valid: boolean) => void, captchaValid: boolean) => void) => {
+        return (oncomplete: (valid: boolean) => void): void => {
+            if (this.enabled && !this.reCAPTCHA && this.hasChanged()) {
+                this.previous = this.value;
+                this.verify(() => {
+                    _baseValidator(oncomplete, this.verified);
+                });
+            } else {
+                _baseValidator(oncomplete, this.verified);
+            }
+        };
+    };
+
+    verify = (callback: () => void) => _post("/captcha/verify/" + this.code + "/" + this.captchaID + "/" + this.input.value, null, (req: XMLHttpRequest) => {
+        if (req.readyState == 4) {
+            if (req.status == 204) {
+                this.checkbox.innerHTML = `<i class="ri-check-line"></i>`;
+                this.checkbox.classList.add("~positive");
+                this.checkbox.classList.remove("~critical");
+                this.verified = true;
+            } else {
+                this.checkbox.innerHTML = `<i class="ri-close-line"></i>`;
+                this.checkbox.classList.add("~critical");
+                this.checkbox.classList.remove("~positive");
+                this.verified = false;
+            }
+            callback();
+        }
+    });
+    
+    generate = () => _get("/captcha/gen/"+this.code, null, (req: XMLHttpRequest) => {
+        if (req.readyState == 4) {
+            if (req.status == 200) {
+                this.captchaID = req.response["id"];
+                document.getElementById("captcha-img").innerHTML = `
+                <img class="w-100" src="${window.location.toString().substring(0, window.location.toString().lastIndexOf("/invite"))}/captcha/img/${this.code}/${this.captchaID}"></img>
+                `;
+                this.input.value = "";
+            }
+        }
+    });
+
+    constructor(code: string, enabled: boolean, reCAPTCHA: boolean) {
+        this.code = code;
+        this.enabled = enabled;
+        this.reCAPTCHA = reCAPTCHA;
+    }
+}

ts/pwr.ts

@@ -28,6 +28,9 @@ interface formWindow extends Window {
     userExpiryHours: number;
     userExpiryMinutes: number;
     userExpiryMessage: string;
+    captcha: boolean;
+    reCAPTCHA: boolean;
+    reCAPTCHASiteKey: string;
 }
 
 loadLangSelector("pwr");

views.go

@@ -296,6 +296,9 @@ func (app *appContext) ResetPassword(gc *gin.Context) {
 		data["telegramEnabled"] = false
 		data["discordEnabled"] = false
 		data["matrixEnabled"] = false
+		data["captcha"] = app.config.Section("captcha").Key("enabled").MustBool(false)
+		data["reCAPTCHA"] = app.config.Section("captcha").Key("recaptcha").MustBool(false)
+		data["reCAPTCHASiteKey"] = app.config.Section("captcha").Key("recaptcha_site_key").MustString("")
 		gcHTML(gc, http.StatusOK, "form-loader.html", data)
 		return
 	}