1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154

// will_options.rs
// This file is part of the Eclipse Paho MQTT Rust Client library.
//

/*******************************************************************************
 * Copyright (c) 2017 Frank Pagliughi <fpagliughi@mindspring.com>
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * and Eclipse Distribution License v1.0 which accompany this distribution.
 *
 * The Eclipse Public License is available at
 *    http://www.eclipse.org/legal/epl-v10.html
 * and the Eclipse Distribution License is available at
 *   http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * Contributors:
 *    Frank Pagliughi - initial implementation and documentation
 *******************************************************************************/

//use std::slice;
use std::ffi::{CString, IntoStringError};
use std::string::{FromUtf8Error};
use std::os::raw::{c_void};

use ffi;

/// The options for the Last Will and Testament (LWT)
#[derive(Debug)]
pub struct WillOptions {
	pub opts: ffi::MQTTAsync_willOptions,
	topic: CString,
	payload: Vec<u8>,
}

impl WillOptions {
	pub fn new() -> WillOptions {
		let opts = WillOptions {
			opts: ffi::MQTTAsync_willOptions::default(),
			topic: CString::new("").unwrap(),
			payload: Vec::new(),
		};
		WillOptions::fixup(opts)
	}

	pub fn from_message<V>(topic: &str, payload: V) -> WillOptions
		where V: Into<Vec<u8>>
	{
		let opts = WillOptions {
			opts: ffi::MQTTAsync_willOptions::default(),
			topic: CString::new(topic).unwrap(),
			payload: payload.into(),
		};
		WillOptions::fixup(opts)
	}

	// Updates the C struct from the cached topic and payload vars
	fn fixup(mut opts: WillOptions) -> WillOptions {
		opts.opts.topicName = opts.topic.as_ptr();
		opts.opts.payload.data = opts.payload.as_ptr() as *const c_void;
		opts.opts.payload.len = opts.payload.len() as i32;
		opts
	}

	/// Gets the topic string for the LWT
	fn get_topic(&self) -> Result<String, IntoStringError> {
		self.topic.clone().into_string()
	}

	/// Gets the payload of the LWT
	pub fn get_payload(&self) -> &Vec<u8> {
		&self.payload
	}

	/// Gets the payload of the message as a string.
	/// Note that this clones the payload.
	pub fn get_payload_str(&self) -> Result<String, FromUtf8Error> {
		String::from_utf8(self.payload.clone())
	}

	/// Returns the Quality of Service (QOS) for the message.
	pub fn get_qos(&self) -> i32 {
		self.opts.qos
	}

	/// Gets the 'retained' flag for the message.
	pub fn get_retained(&self) -> bool {
		self.opts.retained != 0
	}
}

impl Clone for WillOptions {
	fn clone(&self) -> WillOptions {
		let will = WillOptions {
			opts: self.opts.clone(),
			topic: self.topic.clone(),
			payload: self.payload.clone(),
		};
		WillOptions::fixup(will)
	}
}

#[derive(Debug,Clone)]
pub struct WillOptionsBuilder { 
	topic: CString,
	payload: Vec<u8>,
	retained: bool,
	qos: i32,
}

impl WillOptionsBuilder {
	pub fn new() -> WillOptionsBuilder {
		let copts = ffi::MQTTAsync_willOptions::default();

		WillOptionsBuilder {
			topic: CString::new("").unwrap(),
			payload: Vec::new(),
			retained: copts.retained != 0,
			qos: copts.qos,
		}
	}

	pub fn topic(&mut self, topic: &str) -> &mut WillOptionsBuilder {
		self.topic = CString::new(topic).unwrap();
		self
	}

	pub fn payload<V>(&mut self, payload: V) -> &mut WillOptionsBuilder
		where V: Into<Vec<u8>>
	{
		self.payload = payload.into();
		self
	}

	pub fn retained(&mut self, retained: bool) -> &mut WillOptionsBuilder {
		self.retained = retained;
		self
	}

	pub fn qos(&mut self, qos: i32) -> &mut WillOptionsBuilder {
		self.qos = qos;
		self
	}

	pub fn finalize(&self) -> WillOptions {
		let opts = WillOptions {
			opts: ffi::MQTTAsync_willOptions::default(),
			topic: self.topic.clone(),
			payload: self.payload.clone(),
		};
		WillOptions::fixup(opts)
	}
}