How to Create a Contact Form using Telegram Bot API

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You are looking for How to Create a Contact Form using Telegram Bot API then this post is just for you.

The instruction that follows is informative. Please think of a good reason to use it.

You can see the demo here⤵

Requirements

1. A Telegram bot, if you don't have, you can read documentation here Bot API token is required.

2. Login to your Telegram. Creat a new bot on Botfather and copy its API key. Search 'Telegram Bot Raw' click /start button and copy in own Chat Id.

It is not recommended to use a supergroup, as anyone having the groupname can easily join and read your visitors' submissions.

Limitations

As Telegram has a restriction of 4096 characters per message, users cannot send messages longer than 3000 characters. To ensure that all entries are accepted, we must set the character limit to less than 4096, or 3000.

How to Create a Contact Form?

Step 1: First of all Login to your . Blogger Dashboard

Step 2: On Blogger Dashboard, click Pages.

Step 3: Either create a new page by clicking on icon or click on the existing page to add codes there.

Step 4: Switch to <> HTML view.

Step 5: Paste the following codes in it and Publish your page.

<style>
/* Toast Notification */
.tNtf span{position:fixed;left:24px;bottom:-70px;display:inline-flex;align-items:center;text-align:center;justify-content:center;margin-bottom:20px;z-index:99981;background:#323232;color:rgba(255,255,255,.8);font-size:14px;font-family:inherit;border-radius:3px;padding:13px 24px; box-shadow:0 5px 35px rgba(149,157,165,.3);opacity:0;transition:all .1s ease;animation:slideinwards 2s ease forwards;-webkit-animation:slideinwards 2s ease forwards}
@media screen and (max-width:500px){.tNtf span{margin-bottom:20px;left:20px;right:20px;font-size:13px}}
@keyframes slideinwards{0%{opacity:0}20%{opacity:1;bottom:0}50%{opacity:1;bottom:0}80%{opacity:1;bottom:0}100%{opacity:0;bottom:-70px;visibility:hidden}}
@-webkit-keyframes slideinwards{0%{opacity:0}20%{opacity:1;bottom:0}50%{opacity:1;bottom:0}80%{opacity:1;bottom:0}100%{opacity:0;bottom:-70px;visibility:hidden}}
.drK .tNtf span{box-shadow:0 10px 40px rgba(0,0,0,.2)}
</style>

<!--[ Toast Notification ]-->
<div id='toast_notification' class='tNtf'></div>

<!--[ Form ]-->
<form id="telegram_form">
  <input name="name" type="text" placeholder="Name" />
  <input name="email" type="text" placeholder="Email Address" />
  <input name="phone" type="text" placeholder="Phone Number" />
  <input name="files" type="file" placeholder="Attachments" multiple="true" />
  <textarea name="message" placeholder="Message"></textarea>
  <button type="submit">Submit</button>
</form>

<script>
/*! Telegram Bot Form Handler by Tecky AaryaN */
function handleTelegram(e={}){const t={get title(){return document.title},get homepage(){return c.origin},get page(){this.homepage,c.pathname}},r={stringify:e=>`${"string"==typeof e?e:JSON.stringify(e)}`,escapeHTML:e=>e.replace(/&/g,"&amp;").replace(/>/g,"&gt;").replace(/>/g,"&lt;"),objectToFormData(e){const t=new FormData,r=(e,r,n)=>{["string","number","boolean"].includes(typeof r)?t.append(e,`${r}`):r instanceof Blob&&t.append(e,r,n)};return Object.keys(e).forEach((t=>{const n=e[t];Array.isArray(n)?n.forEach((e=>r(t,e))):r(t,n)})),t},getFormData(e){const t=Object.defineProperties({},{toArray:{value(){return Object.keys(this).map((e=>this[e]))}},toValues:{value(){return Object.keys(this).reduce(((e,t)=>(e[t]=this[t].value,e)),{})}}}),{elements:r}=e,n=Object.keys(r).map((e=>r[e].name)).filter(((e,t,r)=>r.indexOf(e)===t&&e));for(let e=0;e<n.length;e+=1){const o=n[e],a=r[o],i={element:a,name:o,type:a.type};switch(a.type){case"checkbox":i.value=a.checked;break;case"file":i.value=Array.from(a.files),i.multiple=a.multiple;break;case"select-multiple":i.value=Array.from(a.options).filter((e=>e.selected)).map((e=>e.value));break;case"date":case"datetime-local":i.value=[""===a.value?null:a.value,isNaN(a.valueAsNumber)?null:a.valueAsNumber];break;default:i.value=""===a.value?null:a.value}t[o]=i}return t}},n={error(r,n){if("function"!=typeof e.onError)throw r;e.onError(r,n,t)},validate:(r,n)=>"function"!=typeof e.validate||!0===e.validate(r,n,t),submit(r,n,o){"function"==typeof e.onSubmit&&e.onSubmit(r,n,o,t)},sent(r,n,o){"function"==typeof e.onSent&&e.onSent(r,n,o,t)},notSent(r,n,o,a){"function"==typeof e.onNotSent&&e.onNotSent(r,n,o,a,t)},complete(r,n,o,a){"function"==typeof e.onComplete&&e.onComplete(r,n,o,a,t)},format(n,o,a){if("function"==typeof e.format){const r=e.format(n,o,a,t);if("string"==typeof r)return r}let i="";return Object.keys(n).forEach((e=>{const t=n[e];"file"!==t.type&&(i&&(i+="\n\n"),i+=`Field: ${r.escapeHTML(e)}\nValue: <pre><code>${r.escapeHTML("string"==typeof t.value?t.value:JSON.stringify(t.value))}</code></pre>`)})),i},caption(n,o,a,i){if("function"==typeof e.caption){const r=e.caption(n,o,a,i,t);if("string"==typeof r)return r}return`Field: ${r.escapeHTML(o.name)}\nName: ${r.escapeHTML(n.name)}\nType: ${r.escapeHTML(n.type)}\nModified at: ${new Date(n.lastModified).toJSON()}`}},{form:o,token:a,chat:i,thread:s}=e,{location:c}=window,l=()=>{};if(!o instanceof HTMLFormElement)return n.error(new TypeError("Field 'form' must be an HTMLFormElement")),l;if("string"!=typeof a)return n.error(new TypeError("Field 'token' must be of type string"),o),l;if("string"!=typeof i&&"number"!=typeof i)return n.error(new TypeError("Field 'chat' must be of type string or number"),o),l;if("thread"in e&&"string"!=typeof s&&"number"!=typeof s)return n.error(new TypeError("Field 'thread' must be of type string or number"),o),l;const p=(e=>({get token(){return e},get url(){return`https://api.telegram.org/bot${this.token}`},async request(e,t){const n=`${this.url}/${e}`;let o=t;t&&(o.reply_markup||o.entities)&&(o={...t},o.reply_markup&&(o.reply_markup=r.stringify(o.reply_markup)),o.entities&&(o.entities=r.stringify(o.entities)));const a=o?r.objectToFormData(o):void 0,i=new Request(n,{method:"POST",body:a,headers:{Accept:"application/json"}}),s=await fetch(i).then((e=>{const t=e.headers.get("Content-Type");return t&&t.startsWith("application/json")?e.json():null}));if(s){if(s.ok)return s.result;if(s.description)throw new Error(s.description)}throw new Error("Response is invalid")},async sendMessage(e,t,r){return this.request("sendMessage",{...r,chat_id:e,text:t})},async sendMediaGroup(e,t,n){const o={};return t&&t.forEach(((e,r)=>{if(e&&e.media instanceof Blob){const n=`file_attach_id_${r}`;o[n]=e.media,t[r]={...e,media:`attach://${n}`}}})),this.request("sendMediaGroup",{...n,...o,chat_id:e,media:r.stringify(t)})}}))(a),u=e=>{e.preventDefault();const a=r.getFormData(o);if(n.submit(e,a,o),n.validate(a,t,o)){const e=a.toArray().filter((e=>"file"===e.type)).reduce(((e,t)=>(t.value.forEach((r=>{const i=n.caption(r,t,a,o);e.push({type:"document",media:r,caption:i,parse_mode:"html"})})),e)),[]);if(0!==e.length){e[e.length-1].caption+=`\n\n${n.format(a,e,o)}`,p.sendMediaGroup(i,e,{message_thread_id:s}).then((e=>{try{n.sent(e,a,o),n.complete(!0,e,a,o)}catch(e){n.error(e,o)}})).catch((e=>{n.notSent(e,"bot",a,o),n.error(e,o),n.complete(!1,e,a,o)}))}else p.sendMessage(i,n.format(a,void 0,o),{message_thread_id:s,parse_mode:"html"}).then((e=>{try{n.sent(e,a,o),n.complete(!0,e,a,o)}catch(e){n.error(e,o)}})).catch((e=>{n.notSent(e,"bot",a,o),n.error(e,o),n.complete(!1,e,a,o)}))}else{const e=new Error("Validation Failed");n.notSent(e,"validation",a,o),n.complete(!1,e,a,o)}};return o.addEventListener("submit",u),()=>{o.removeEventListener("submit",u)}}
</script>

<script>
// Toast Notification function
function toast(m){
  var e = document.getElementById('toast_notification');
  if (e !== null) {
    e.innerHTML = `<span>${m}</span>`
  } else {
    alert(m);
  }
};

const formElement = document.getElementById("telegram_form");
const submitButton = formElement.querySelector("button");

// Attach onSubmit Event listener and send data to telegram
const unsubscribe = handleTelegram({
  form: formElement,
  token: "208*******:AAG*******_**********-7*********Z0I",
  chat:-1002200000000,

  // Formatting
  format(data, media, form) {},
  caption(file, field, data, form) {},

  // Validation
  validate(data, form) {
    if (!data.name.value) {
      data.name.element.focus();
      return toast("Enter your name!");
    }

    if (!data.email.value) {
      data.email.element.focus();
      return toast("Enter your email!")
    }

    return true;
  },

  // Callbacks
  onSubmit(event, data, form) {
    submitButton.disabled = true;
  },
  onComplete(success, response, data, form) {
    submitButton.disabled = false;
  },
  onSent(response, data, form) {
    toast(`Hey, ${data.name.value}! Form submitted!`);
    // Reset form after submission
    formElement.reset();
  },
  onNotSent(error, reason, data, form) {
    if (reason !== "validation") {
      toast(`Form failed to submit! (${(error || {}).message || "Unknown"})`);
    }
  },
  onError(error, form) {
    console.log(error)
  },
});

// Call the unsubscribe function to remove listener
// unsubscribe();
</script>

Replace the marked parts with correct information.

It is not at all safe to make your Bot API Token publicly available. Use any JavaScript obfuscator to obfuscate the Forms Configuration codes after making all the changes. You can revoke and generate new API Token of your bot through Bot Father at any time you think something is going wrong with the bot token.

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