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App.js
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App.js
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import React from 'react';
import Header from './Header.js';
import BulletinBoard from './BulletinBoard.js';
import Footer from './Footer.js';
import firebase from '../firebase.js';
class App extends React.Component {
constructor() {
super();
this.state = {
messages: [],
value: "",
showError: false,
minutes: 0,
seconds: 0,
givenTime: 10,
showDeleteOption: false
};
}
//when mounted, check the DB for data and setState
componentDidMount() {
const dbRef = firebase.database().ref();
dbRef.on("value", response => {
//create an empty array to contain data from the db
const newState = [];
//store the data from the db in a variable
const data = response.val();
for (let key in data) {
newState.push({
key: key,
userMessage: data[key].value,
likes: data[key].likeCount
});
}
this.setState({
messages: newState
});
});
}
addNewInput = currentInput => {
//add new input the state
this.setState({
value: currentInput
});
};
//on click post
updateDB = event => {
event.preventDefault();
if (this.state.value) {
const dbRef = firebase.database().ref();
dbRef.push({ value: this.state.value, likeCount: 0 });
} else {
this.setState({
showError: true
});
}
this.setState({
value: ""
});
};
toggleErrorMessage = () => {
this.setState({
showError: !this.state.showError
});
};
addNewLikeCount = key => {
const dbRef = firebase
.database()
.ref()
.child(key);
const dbLikeCount = dbRef.child("likeCount");
let updatedCount;
dbLikeCount.on("value", snapshot => {
const currentLikeCount = snapshot.val();
updatedCount = currentLikeCount + 1;
return updatedCount;
});
dbLikeCount.set(updatedCount);
};
removeInput = key => {
const dbRef = firebase
.database()
.ref()
.child(key);
dbRef.remove();
};
tick = () => {
this.timer= setInterval(() => {
const secondsRemaining = this.state.givenTime;
if(secondsRemaining > 0) {
const newTime = secondsRemaining - 1;
const min = Math.floor(newTime / 60);
const sec = Math.floor((newTime / 60 - min) * 60);
this.setState({
minutes: min,
seconds: sec,
givenTime: newTime,
showDeleteOption: true
});
} else {
this.setState({
showDeleteOption: false
})
}
}, 1000);
};
stopTimer = () => {
clearInterval(this.timer);
this.setState({
showDeleteOption: false
});
}
render() {
return (
<div className="app">
<Header
addNewInput={this.addNewInput}
updateDB={this.updateDB}
value={this.state.value}
showError={this.state.showError}
toggleErrorMessage={this.toggleErrorMessage}
tick={this.tick}
showDeleteOption={this.state.showDeleteOption}
minutes={this.state.minutes}
seconds={this.state.seconds}
removeInput={this.removeInput}
messages={this.state.messages}
stopTimer={this.stopTimer}
/>
<BulletinBoard
messages={this.state.messages}
addNewLikeCount={this.addNewLikeCount}
/>
<Footer />
</div>
);
}
}
export default App;