Election DApp

.gitattributes

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+*.sol linguist-language=Solidity

LICENSE

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+The MIT License (MIT)
+
+Copyright (c) 2018 Truffle
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+

README.md

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+Dependencies:
+1. NodeJS
+2. Truffle Framework
+3. Ganache
+4. Metamask (pw=(<usual>.metamask)
+5. Syntax Highlighting - optional

bs-config.json

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+{
+  "server": {
+    "baseDir": ["./src", "./build/contracts"]
+  }
+}

contracts/Election.sol

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+pragma solidity 0.4.25;
+
+contract Election {
+    // Model a Candidate
+    struct Candidate {
+        uint id;
+        string name;
+        uint voteCount;
+    }
+
+    // Store accounts that have voted
+    mapping(address => bool) public voters;
+    // Store Candidates
+    // Fetch Candidate
+    mapping(uint => Candidate) public candidates;
+    // Store Candidates Count
+    uint public candidatesCount;
+
+    // voted event
+    event votedEvent (
+        uint indexed _candidateId
+    );
+
+    constructor () public {
+        addCandidate("Candidate 1");
+        addCandidate("Candidate 2");
+    }
+
+    function addCandidate (string _name) private {
+        candidatesCount ++;
+        candidates[candidatesCount] = Candidate(candidatesCount, _name, 0);
+    }
+
+    function vote (uint _candidateId) public {
+        // require that they haven't voted before
+        require(!voters[msg.sender]);
+
+        // require a valid candidate
+        require(_candidateId > 0 && _candidateId <= candidatesCount);
+
+        // record that voter has voted
+        voters[msg.sender] = true;
+
+        // update candidate vote Count
+        candidates[_candidateId].voteCount ++;
+
+        // trigger voted event
+        emit votedEvent(_candidateId);
+    }
+}

contracts/Migrations.sol

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+pragma solidity ^0.4.2;
+
+contract Migrations {
+  address public owner;
+  uint public last_completed_migration;
+
+  modifier restricted() {
+    if (msg.sender == owner) _;
+  }
+
+  constructor () public {
+    owner = msg.sender;
+  }
+
+  function setCompleted(uint completed) public restricted {
+    last_completed_migration = completed;
+  }
+
+  function upgrade(address new_address) public restricted {
+    Migrations upgraded = Migrations(new_address);
+    upgraded.setCompleted(last_completed_migration);
+  }
+}

migrations/1_initial_migration.js

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+var Migrations = artifacts.require("./Migrations.sol");
+
+module.exports = function(deployer) {
+  deployer.deploy(Migrations);
+};

migrations/2_deploy_contracts.js

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+var Election = artifacts.require("./Election.sol");
+
+module.exports = function(deployer) {
+  deployer.deploy(Election);
+};