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todo.sol
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| pragma solidity ^0.4.20; | |
| contract TodoList { | |
| struct Todo { | |
| uint256 id; | |
| bytes32 content; | |
| address owner; | |
| bool isCompleted; | |
| uint256 timestamp; | |
| } | |
| uint256 public constant maxAmountOfTodos = 100; | |
| // Owner => todos | |
| mapping(address => Todo[maxAmountOfTodos]) public todos; | |
| // Owner => last todo id | |
| mapping(address => uint256) public lastIds; | |
| // Add a todo to the list function | |
| function addTodo(bytes32 _content) public { | |
| Todo memory myNote = Todo(lastIds[msg.sender], _content, msg.sender, false, now); | |
| todos[msg.sender][lastIds[msg.sender]] = myNote; | |
| if(lastIds[msg.sender] >= maxAmountOfTodos) { | |
| lastIds[msg.sender] = 0; | |
| } else { | |
| lastIds[msg.sender]++; | |
| } | |
| } | |
| // Mark a todo as completed | |
| function markTodoAsCompleted(uint256 _todoId) public { | |
| require(_todoId < maxAmountOfTodos); | |
| require(!todos[msg.sender][_todoId].isCompleted); | |
| require(msg.sender == todos[msg.sender][_todoId].owner); | |
| todos[msg.sender][_todoId].isCompleted = true; | |
| } | |
| } |
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