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| const contractAddress = "0x39e5196750dcddb1aaf6dda7d6e8dbb633482905"
var simpleStorageInstance
class App extends Component {
constructor(props) {
super(props)
this.state = {
word: null,
from: null,
timestamp: null,
random: 0,
count: 0,
input: '',
web3: null,
emptyTip: "还没有留言，快来创建全世界第一条留言吧~",
firstTimeLoad: true,
loading: false,
loadingTip: "留言正在写入，请耐心等待~",
waitingTip: "留言正在写入，请耐心等待~",
successTip: "留言成功",
animate: "",
in: css(styles.in),
out: css(styles.out)
}
}
componentWillMount() {
getWeb3
.then(results => {
this.setState({
web3: results.web3
})
this.instantiateContract()
})
.catch(() => {
console.log('Error finding web3.')
})
}
instantiateContract() {
const contract = require('truffle-contract')
const simpleStorage = contract(SimpleStorageContract)
simpleStorage.setProvider(this.state.web3.currentProvider)
this.state.web3.eth.getAccounts((error, accounts) => {
simpleStorage.at(contractAddress).then(instance => {
simpleStorageInstance = instance
console.log("合约实例获取成功")
})
.then(result => {
return simpleStorageInstance.getRandomWord(this.state.random)
})
.then(result => {
console.log("读取成功", result)
if(result[1]!=this.setState.word){
this.setState({
pub-f7b48bfa48024ba389d1065d05b367db.r2.dev animate: this.state.out
})
setTimeout(() => {
this.setState({
count: result[0].c[0],
word: result[1],
from: result[2],
timestamp: result[3],
animate: this.state.in,
firstTimeLoad: false
})
}, 2000)
}else{
this.setState({
firstTimeLoad: false
})
}
this.randerWord()
})
})
}
randerWord() {
setInterval(() => {
let random_num = Math.random() * (this.state.count? this.state.count: 0)
this.setState({
random: parseInt(random_num)
})
console.log("setInterval读取", this.state.random)
simpleStorageInstance.getRandomWord(this.state.random)
.then(result => {
console.log("setInterval读取成功", result)
if(result[1]!=this.setState.word){
this.setState({
animate: this.state.out
})
setTimeout(() => {
this.setState({
count: result[0].c[0],
word: result[1],
from: result[2],
timestamp: result[3],
animate: this.state.in
})
}, 2000)
}
})
}, 10000)
}
setWord(){
if(!this.state.input) return
this.setState({
loading: true
})
let timestamp = new Date().getTime()
simpleStorageInstance.setWord(this.state.input, String(timestamp), {from: this.state.web3.eth.accounts[0]})
.then(result => {
this.setState({
loadingTip: this.state.successTip
})
setTimeout(() => {
this.setState({
loading: false,
input: '',
loadingTip: this.state.waitingTip
})
}, 1500)
})
.catch(e => {
this.setState({
loading: false
})
})
}
formatTime(timestamp) {
let date = new Date(Number(timestamp))
let year = date.getFullYear()
let month = date.getMonth() + 1
let day = date.getDate()
let hour = date.getHours()
let minute = date.getMinutes()
let second = date.getSeconds()
let fDate = [year, month, day, ].map(this.formatNumber)
return fDate[0] + '年' + fDate[1] + '月' + fDate[2] + '日' + ' ' + [hour, minute, second].map(this.formatNumber).join(':')
}
formatNumber(n) {
n = n.toString()
return n[1] ? n : '0' + n
}
}
|
