Expand/minimize text in message #4267

from telegram import Update, InlineKeyboardButton, InlineKeyboardMarkup
from telegram.ext import ApplicationBuilder, CallbackQueryHandler, ContextTypes

TOKEN = "YOUR_TOKEN"

# Your event data
EVENTS = {
    "event_1": {
        "title": "📅 Event 1",
        "details": (
            "🎉 *Community Meetup*\n"
            "📍 Location: Central Park\n"
            "🕐 Time: Saturday, 5 PM\n"
            "📝 Bring your ID and enthusiasm!\n"
            "Contact @admin for more info."
        )
    },
    "event_2": {
        "title": "📅 Event 2",
        "details": (
            "🏆 *Quiz Night*\n"
            "📍 Location: The Tavern\n"
            "🕐 Time: Friday, 8 PM\n"
            "📝 Teams of 4. Prize: ₹500 voucher.\n"
            "Register by Thursday!"
        )
    },
}

def collapsed_keyboard():
    """All events shown as collapsed buttons."""
    return InlineKeyboardMarkup([
        [InlineKeyboardButton(data["title"], callback_data=f"expand_{key}")]
        for key, data in EVENTS.items()
    ])

def expanded_keyboard(expanded_key: str):
    """One event expanded, rest collapsed."""
    rows = []
    for key, data in EVENTS.items():
        if key == expanded_key:
            # This one is open — show a collapse button for it
            rows.append([InlineKeyboardButton("▲ Collapse", callback_data=f"collapse_{key}")])
        else:
            rows.append([InlineKeyboardButton(data["title"], callback_data=f"expand_{key}")])
    return InlineKeyboardMarkup(rows)

def build_message_text(expanded_key: str | None) -> str:
    if expanded_key is None:
        return "Tap an event to see details:"
    return f"Tap an event to see details:\n\n{EVENTS[expanded_key]['details']}"

async def handle_callback(update: Update, context: ContextTypes.DEFAULT_TYPE):
    query = update.callback_query
    await query.answer()

    data = query.data

    if data.startswith("expand_"):
        key = data.removeprefix("expand_")
        if key not in EVENTS:
            return
        await query.edit_message_text(
            text=build_message_text(key),
            reply_markup=expanded_keyboard(key),
            parse_mode="Markdown"
        )

    elif data.startswith("collapse_"):
        key = data.removeprefix("collapse_")
        await query.edit_message_text(
            text=build_message_text(None),
            reply_markup=collapsed_keyboard(),
            parse_mode="Markdown"
        )

if __name__ == "__main__":
    app = ApplicationBuilder().token(TOKEN).build()
    app.add_handler(CallbackQueryHandler(handle_callback))
    app.run_polling()

await context.bot.send_message(
    chat_id=update.effective_chat.id,
    text="Tap an event to see details:",
    reply_markup=collapsed_keyboard()
)