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Trace.sol
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Trace.sol
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pragma solidity >=0.4.22 <0.7.0;
pragma experimental ABIEncoderV2;
import "./FoodInfoItem.sol";
import "./Distributor.sol";
import "./Producer.sol";
import "./Retailer.sol";
//食品溯源合约(负责具体食品溯源信息的生成)
// 1.实现生产食品的方法(新建食品信息)
// 2.实现食品分销过程中增加溯源信息的接口
// 3.实现食品出售过程中增加溯源信息的接口
// 4.实现获取食品溯源信息接口
contract Trace is Producer, Distributor, Retailer{
mapping (uint256 => address) foods;//食品溯源id到具体食品溯源合约的映射表
uint[] foodList;
//构造函数
constructor(address producer, address distributor, address retailer)
public Producer(producer)
Distributor(distributor)
Retailer(retailer){
}
//生成食品溯源信息接口
//只有Producer能调用
//name 食品名称
//traceNumber 食品溯源id
//traceName 当前用户名称
//quality 当前食品质量
function newFood(string name, uint256 traceNumber, string traceName, uint8 quality)
public onlyProducer returns(address)
{
require(foods[traceNumber] == address(0), "traceNumber already exist");
FoodInfoItem food = new FoodInfoItem(name, traceName, quality, msg.sender);
foods[traceNumber] = food;
foodList.push(traceNumber);
return food;
}
//食品分销过程中增加溯源信息的接口
//只有Distributor能调用
//traceNumber 食品溯源id
//traceName 当前用户名称
//quality 当前食品质量
function addTraceInfoByDistributor(uint256 traceNumber, string traceName, uint8 quality)
public onlyDistributor returns(bool) {
require(foods[traceNumber] != address(0), "traceNumber does not exist");
return FoodInfoItem(foods[traceNumber]).addTraceInfoByDistributor( traceName, msg.sender, quality);
}
//食品出售过程中增加溯源信息的接口
//只有Retailer能调用
//traceNumber 食品溯源id
//traceName 当前用户名称
//quality 当前食品质量
function addTraceInfoByRetailer(uint256 traceNumber, string traceName, uint8 quality)
public onlyRetailer returns(bool) {
require(foods[traceNumber] != address(0), "traceNumber does not exist");
return FoodInfoItem(foods[traceNumber]).addTraceInfoByRetailer(traceName, msg.sender, quality);
}
//获取食品溯源信息接口
//string[] 保存食品流转过程中各个阶段的相关信息
//address[] 保存食品流转过程各个阶段的用户地址信息(和用户一一对应)
//uint8[] 保存食品流转过程中各个阶段的状态变化
function getTraceInfo(uint256 traceNumber) public constant returns(uint[], string[], address[], uint8[]) {
require(foods[traceNumber] != address(0), "traceNumber does not exist");
return FoodInfoItem(foods[traceNumber]).getTraceInfo();
}
function getFood(uint256 traceNumber) public constant returns(uint, string, string, string, address, uint8) {
require(foods[traceNumber] != address(0), "traceNumber does not exist");
return FoodInfoItem(foods[traceNumber]).getFood();
}
function getAllFood() public constant returns (uint[]) {
return foodList;
}
}