Easy Schedule

A flexible and powerful task scheduler built on Tokio, providing multiple scheduling options with advanced skip conditions and timezone support.

✨ Features

🕐 Multiple Scheduling Types

• Wait - Execute once after a delay
• Interval - Execute repeatedly at fixed intervals
• At - Execute daily at specific times
• Once - Execute at an exact datetime

🚫 Flexible Skip Conditions

• Date-based: Skip specific dates or date ranges
• Weekday-based: Skip specific weekdays or weekday ranges
• Time-based: Skip specific times or time ranges (including overnight ranges)
• Combinable: Use multiple skip rules together

🌍 Advanced Features

• Timezone Support - Full timezone support with minute-level precision
• String Parsing - Create tasks from intuitive strings like wait(5), at(14:30)
• Cancellation - Comprehensive task cancellation support
• Next Run Time - Query when tasks will next execute
• Error Handling - Robust error handling with sensible defaults
• Async/Await - Full async support with Tokio integration

🚀 Quick Start

Add to your Cargo.toml:

[dependencies]
easy-schedule = "0.11"
tokio = { version = "1", features = ["full"] }
time = { version = "0.3", features = ["macros"] }

📖 Usage

Basic Setup

use easy_schedule::prelude::*;
use time::{Time, OffsetDateTime, macros::offset};

#[derive(Debug)]
struct MyTask {
    name: String,
}

#[async_trait]
impl Notifiable for MyTask {
    fn get_task(&self) -> Task {
        Task::Wait(5, None) // Wait 5 seconds
    }

    async fn on_time(&self, cancel: CancellationToken) {
        println!("{} executed!", self.name);
        cancel.cancel(); // Stop after first execution
    }
}

#[tokio::main]
async fn main() {
    let scheduler = Scheduler::new();
    
    scheduler.run(MyTask { name: "my_task".to_string() }).await;
    
    tokio::time::sleep(std::time::Duration::from_secs(10)).await;
    scheduler.stop();
}

Task Types

use easy_schedule::prelude::*;
use time::{Time, macros::time};

// Wait 30 seconds then execute once
let wait_task = Task::Wait(30, None);
let scheduler = Scheduler::new();

// Execute every 60 seconds
let interval_task = Task::Interval(60, None);
let scheduler = Scheduler::new();

// Execute daily at 9:00 AM
let at_task = Task::At(time!(09:00), None);
let scheduler = Scheduler::new();

// Execute once at specific datetime
let future = OffsetDateTime::now_utc() + time::Duration::minutes(5);
let once_task = Task::Once(future, None);
let scheduler = Scheduler::new();

Skip Conditions

use easy_schedule::prelude::*;
use time::macros::time;

let skip_rules = vec![
    Skip::Day(vec![6, 7]),                           // Skip weekends
    Skip::TimeRange(time!(22:00), time!(06:00)),     // Skip night hours
    Skip::Time(time!(12:00)),                        // Skip lunch time
];

let task = Task::Interval(3600, Some(skip_rules));  // Every hour, with skips
let scheduler = Scheduler::new();

Next Run Time

use easy_schedule::prelude::*;

let task = Task::Interval(60, None);
let scheduler = Scheduler::new();

// Create a test task that implements Notifiable
struct TestTask(Task);

#[async_trait]
impl Notifiable for TestTask {
    fn get_task(&self) -> Task { self.0.clone() }
    async fn on_time(&self, _cancel: CancellationToken) {}
}

let test_task = TestTask(task);
if let Some(next_time) = scheduler.get_next_run_time(test_task) {
    println!("Next execution: {}", next_time);
} else {
    println!("Task will not run (likely skipped)");
}

Timezone Support

use easy_schedule::prelude::*;

// Different timezone configurations
let utc_scheduler = Scheduler::with_timezone(0, 0);         // UTC
let tokyo_scheduler = Scheduler::with_timezone(9, 0);       // JST
let india_scheduler = Scheduler::with_timezone(5, 30);      // IST

// Or use minute offsets directly
let custom_scheduler = Scheduler::with_timezone_minutes(330); // UTC+5:30

📋 Task Types Reference

🚫 Skip Rules Reference

🛠️ Advanced Usage

Custom Cancellation Logic

#[async_trait]
impl Notifiable for SmartTask {
    async fn on_time(&self, cancel: CancellationToken) {
        // Custom logic to decide when to stop
        if self.should_stop() {
            cancel.cancel();
        }
    }
}

Multiple Skip Conditions

let complex_skips = vec![
    Skip::Day(vec![6, 7]),                    // No weekends
    Skip::TimeRange(time!(01:00), time!(06:00)), // No early morning
    Skip::Date(date!(2024-12-25)),            // No Christmas
];

let task = Task::Interval(1800, Some(complex_skips));     // Every 30 minutes with conditions

🧪 Testing

Run the comprehensive test suite:

cargo test                    # Run all tests
cargo test --test skip_tests  # Test skip functionality
cargo test --test task_tests  # Test task parsing

📄 License

• Apache License, Version 2.0, (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)