@grammyjs/stateless-question
v4.0.0
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Create stateless questions to Telegram users working in privacy mode
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Stateless Question
Create stateless questions to Telegram users working in privacy mode
You want to keep the privacy of the user with Telegrams privacy mode enabled (by default), send users translated questions in their language and don't save the state what users are currently doing?
This library wants to solve this problem.
The basic idea is to send your question with a
special text at the end.
This text is invisible to the user but still visible for your bot. When the user
replies to a message the message is checked. If it is containing this special
text at the end it is an answer to the question. This way you can have many
strings for the same questions as when having translations. You only have to
make sure the uniqueIdentifier
is unique within your bot.
Special thanks to @Ramin-Bateni and take a look on his explanation how this works if you like.
Install
npm install grammy @grammyjs/stateless-question
Usage
import {StatelessQuestion} from '@grammyjs/stateless-question';
const bot = new Bot(token);
const unicornQuestion = new StatelessQuestion('unicorns', ctx => {
console.log('User thinks unicorns are doing:', ctx.message)
})
// Dont forget to use the middleware
bot.use(unicornQuestion.middleware())
bot.command('rainbows', async ctx => {
let text
if (ctx.session.language === 'de') {
text = 'Was machen Einhörner?'
} else {
text = 'What are unicorns doing?'
}
return unicornQuestion.replyWithMarkdown(ctx, text)
})
// Or send your question manually (make sure to use a parse_mode and force_reply!)
bot.command('unicorn', async ctx => ctx.replyWithMarkdown('What are unicorns doing?' + unicornQuestion.messageSuffixMarkdown(), {parse_mode: 'Markdown', reply_markup: {force_reply: true}})
bot.command('unicorn', async ctx => ctx.replyWithHTML( 'What are unicorns doing?' + unicornQuestion.messageSuffixHTML(), {parse_mode: 'HTML', reply_markup: {force_reply: true}})
Additional State
When your question is specific for a certain topic then you can use the
additionalState
to remember that stateless with the message. For example when
you want to know in which room an event is happening you can set the event as
additionalState
. This also helpful when working with
telegraf-inline-menu to
store the path to return the menu to.
const locationQuestion = new StatelessQuestion(
"target",
(ctx, additionalState) => {
console.log("Location of", additionalState, "is", ctx.message.text);
saveHeroLocation(additionalState, ctx.message.text);
},
);
// Dont forget to use the middleware
bot.use(locationQuestion.middleware());
bot.command("batman", async (ctx) => {
return locationQuestion.replyWithMarkdown(ctx, "Where is Batman?", "batman");
});
bot.command("superman", async (ctx) => {
return locationQuestion.replyWithMarkdown(
ctx,
"Where is superman?",
"superman",
);
});
selective
ForceReply
When using in groups in might be nice to only request a reply from the user
starting the question. Telegram provides selected
as an option for the
ForceReply.
In order to make selected
work you need to reply to a message
(reply_to_message_id
) or need to mention the user(s) which should reply to
this.
await ctx.replyWithHTML(
"What are unicorns doing?" + unicornQuestion.messageSuffixHTML(),
{
parse_mode: "HTML",
reply_to_message_id: ctx.message.message_id,
reply_markup: {
force_reply: true,
selective: true,
},
},
);
Known Issues
The ForceReply question is always shown in some Telegram Clients even long after the question has already answered
see #4
As of the design choices Telegram made to create ForceReply it's hard for a
Telegram Client to know if a question is still relevant or not. As a workaround
we can send
ReplyKeyboardRemove as
reply_markup
with messages that do not require any other reply_markup
(only
one is possible for a message).
const unicornQuestion = new StatelessQuestion("unicorns", async (ctx) => {
console.log("User thinks unicorns are doing:", ctx.message);
await ctx.reply("if you think so...", {
reply_markup: { remove_keyboard: true },
});
});
Sending an abort/back (inline) button with the question message
see #1
Telegram allows only one reply_markup
at a time. As this library relies on
replies to a message ForceReply
is already used as the reply_markup
. In order to send an (inline) button with
the same message it would require an (inline) keyboard markup. That would be a
second reply_markup
which Telegram sadly does not support.