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FirestoreCollection.js
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FirestoreCollection.js
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import { Component } from 'react';
import PropTypes from 'prop-types';
import withFirestore from './withFirestore';
import deepEqual from './utils/deepEqual';
class FirestoreCollection extends Component {
static propTypes = {
path: PropTypes.string.isRequired,
sort: PropTypes.string,
limit: PropTypes.number,
filter: PropTypes.oneOfType([
PropTypes.arrayOf(
PropTypes.oneOfType([
PropTypes.string,
PropTypes.number,
PropTypes.object,
]),
),
PropTypes.arrayOf(PropTypes.array),
]),
children: PropTypes.func,
render: PropTypes.func,
firestore: PropTypes.object.isRequired,
};
state = {
isLoading: true,
data: [],
error: null,
snapshot: null,
};
componentDidMount() {
this.setupFirestoreListener();
}
componentWillUnmount() {
this.handleUnsubscribe();
}
componentWillReceiveProps(nextProps) {
if (
nextProps.path !== this.props.path ||
nextProps.sort !== this.props.sort ||
nextProps.limit !== this.props.limit ||
!deepEqual(nextProps.filter, this.props.filter)
) {
this.handleUnsubscribe();
this.setState({ isLoading: true }, () => this.setupFirestoreListener());
}
}
handleUnsubscribe() {
if (this.unsubscribe) {
this.unsubscribe();
}
}
setupFirestoreListener = () => {
const { firestore, path, ...queryProps } = this.props;
const collectionRef = firestore.collection(path);
const query = this.buildQuery(collectionRef, queryProps);
this.unsubscribe = query.onSnapshot(
this.handleOnSnapshotSuccess,
this.handleOnSnapshotError,
);
};
handleOnSnapshotSuccess = snapshot => {
if (snapshot) {
this.setState({
isLoading: false,
data: snapshot.docs.map(doc => ({
id: doc.id,
...doc.data(),
})),
error: null,
snapshot,
});
}
};
handleOnSnapshotError = error => {
this.setState({
isLoading: false,
data: [],
error,
snapshot: null,
});
};
buildQuery = (collectionRef, queryProps) => {
const { sort, limit, filter } = queryProps;
let query = collectionRef;
if (sort) {
sort.split(',').forEach(sortItem => {
const [field, order] = sortItem.split(':');
query = query.orderBy(field, order);
});
}
if (limit) {
query = query.limit(limit);
}
if (filter) {
//if filter is array of array, build the compound query
if (Array.isArray(filter[0])) {
filter.forEach(clause => {
query = query.where(...clause);
});
} else {
//build the simple query
query = query.where(...filter);
}
}
return query;
};
render() {
const { children, render } = this.props;
if (render) return render(this.state);
if (typeof children === 'function') return children(this.state);
return null;
}
}
export default withFirestore(FirestoreCollection);