Web3/main.js at main · Syechran/Web3 · GitHub

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let WALLET_CONNECTED = "";
let contractAddress = ""; // in the video it is 0xdD3375552d7eDd5Bf695bF1143515697733d6FCa
let contractAbi = [
    {
      "inputs": [],
      "stateMutability": "nonpayable",
      "type": "constructor"
    },
    {
      "inputs": [
        {
          "internalType": "string",
          "name": "_desc",
          "type": "string"
        }
      ],
      "name": "addTask",
      "outputs": [],
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "inputs": [],
      "name": "getAllTasks",
      "outputs": [
        {
          "components": [
            {
              "internalType": "string",
              "name": "desc",
              "type": "string"
            },
            {
              "internalType": "enum TaskToDo.TaskStatus",
              "name": "status",
              "type": "uint8"
            }
          ],
          "internalType": "struct TaskToDo.Task[]",
          "name": "",
          "type": "tuple[]"
        }
      ],
      "stateMutability": "view",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "uint256",
          "name": "id",
          "type": "uint256"
        }
      ],
      "name": "getTask",
      "outputs": [
        {
          "internalType": "string",
          "name": "",
          "type": "string"
        },
        {
          "internalType": "enum TaskToDo.TaskStatus",
          "name": "",
          "type": "uint8"
        }
      ],
      "stateMutability": "view",
      "type": "function"
    },
    {
      "inputs": [],
      "name": "getTaskCount",
      "outputs": [
        {
          "internalType": "uint256",
          "name": "",
          "type": "uint256"
        }
      ],
      "stateMutability": "view",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "uint256",
          "name": "id",
          "type": "uint256"
        }
      ],
      "name": "markAsFinished",
      "outputs": [],
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "uint256",
          "name": "",
          "type": "uint256"
        }
      ],
      "name": "tasks",
      "outputs": [
        {
          "internalType": "string",
          "name": "desc",
          "type": "string"
        },
        {
          "internalType": "enum TaskToDo.TaskStatus",
          "name": "status",
          "type": "uint8"
        }
      ],
      "stateMutability": "view",
      "type": "function"
    }
  ];

const connectMetamask = async() => {
    const provider = new ethers.providers.Web3Provider(window.ethereum);
    await provider.send("eth_requestAccounts", []);
    const signer = provider.getSigner();
    WALLET_CONNECTED = await signer.getAddress();
    var element = document.getElementById("metamasknotification");
    element.innerHTML = "Metamask is connected " + WALLET_CONNECTED;
}

const getAllTasks = async() => {
    if(WALLET_CONNECTED != 0) {
        var p3 = document.getElementById("p3");
        const provider = new ethers.providers.Web3Provider(window.ethereum);
        await provider.send("eth_requestAccounts", []);
        const signer = provider.getSigner();
        const contractInstance = new ethers.Contract(contractAddress, contractAbi, signer);
        p3.innerHTML = "Please wait, getting all the tasks from the smart contract";
        var tasks = await contractInstance.getAllTasks();

        var table = document.getElementById("myTable");

        for (let i = 0; i < tasks.length; i++) {
            var row = table.insertRow();
            var idCell = row.insertCell();
            var descCell = row.insertCell();
            var statusCell = row.insertCell();

            const status = tasks[i].status == 0 ? "Pending" : "Finished";

            idCell.innerHTML = i;
            descCell.innerHTML = tasks[i].desc;
            statusCell.innerHTML = status;
        }

        p3.innerHTML = "The tasks are updated"
    }
    else {
        var p3 = document.getElementById("p3");
        p3.innerHTML = "Please connect metamask first";
    }
}