ferogram 0.6.5

A native, elegant, and asynchronous MTProto framework in Rust for Telegram clients, bots, and applications.
Documentation 
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/*
 * Copyright (c) 2026 Ankit Chaubey <ankitchaubey.dev@gmail.com>
 * https://github.com/ankit-chaubey
 *
 * Project: ferogram
 * Website: https://ferogram.dev
 *
 * Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 * https://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 * <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option.
 * This file may not be copied, modified, or distributed except according
 * to those terms.
 */

//! List every dialog (chat) in the account, newest first, with unread counts.
//!
//! Enumerating the full dialog list is impossible over the Bot API - bots only
//! learn about chats they are added to. MTProto gives you the complete picture
//! across all DMs, groups, channels and bots in one paginated walk.
//!
//! Run:
//!   cargo run --example dialogs_list
//!
//! Fill in API_ID, API_HASH and PHONE below, then run. Session is reused on
//! subsequent runs.

use ferogram::{Client, TransportKind};

const API_ID: i32 = 0; // from https://my.telegram.org
const API_HASH: &str = ""; // from https://my.telegram.org
const PHONE: &str = ""; // e.g. "+15551234567"

/// Stop after printing this many dialogs. Set to 0 for no limit (walks the
/// entire account - may take a few seconds for large accounts).
const MAX_DIALOGS: usize = 50;

#[tokio::main]
async fn main() {
    if let Err(e) = run().await {
        eprintln!("error: {e}");
        std::process::exit(1);
    }
}

async fn run() -> Result<(), Box<dyn std::error::Error>> {
    if API_ID == 0 || API_HASH.is_empty() || PHONE.is_empty() {
        eprintln!("Fill in API_ID, API_HASH and PHONE at the top of dialogs_list.rs");
        std::process::exit(1);
    }

    println!("Connecting...");
    let (client, _shutdown) = Client::builder()
        .api_id(API_ID)
        .api_hash(API_HASH)
        .transport(TransportKind::Abridged)
        .connect()
        .await?;

    if !client.is_authorized().await? {
        login(&client).await?;
        client.save_session().await?;
        println!("Session saved.");
    }

    let me = client.get_me().await?;
    let display = me
        .first_name
        .as_deref()
        .unwrap_or(me.username.as_deref().unwrap_or("?"));
    println!("Logged in as {display}\n");

    let limit_label = if MAX_DIALOGS == 0 {
        "all".to_string()
    } else {
        MAX_DIALOGS.to_string()
    };
    println!("Dialogs ({limit_label}):\n{}", "-".repeat(60));

    // iter_dialogs() pages through GetDialogs automatically.
    // Each Dialog carries the chat entity and the top message already resolved.
    let mut iter = client.iter_dialogs();
    let mut n = 0usize;
    let mut total_unread = 0i32;

    while let Some(dialog) = iter.next(&client).await? {
        n += 1;
        let unread = dialog.unread_count();
        total_unread += unread;

        let badge = if unread > 0 {
            format!("  [{unread} unread]")
        } else {
            String::new()
        };

        // Print total once we get it back from the first server response.
        if n == 1 {
            if let Some(total) = iter.total() {
                println!("Total dialogs reported by server: {total}\n");
            }
        }

        println!("{n:>4}. {}{badge}", dialog.title());

        if MAX_DIALOGS > 0 && n >= MAX_DIALOGS {
            println!("... (truncated at {MAX_DIALOGS})");
            break;
        }
    }

    println!(
        "{}\nShowed {n} dialog(s), {total_unread} total unread message(s).",
        "-".repeat(60)
    );
    Ok(())
}

async fn login(client: &Client) -> Result<(), Box<dyn std::error::Error>> {
    let name = client.interactive_sign_in(PHONE).await?;
    println!("Signed in as {name}");
    Ok(())
}