In my react application a user enters a keyword and gets a list of results. I am trying to implement filters on these results. Below is the screenshot of filters.
Here is my state
class SearchResultsPage extends React.Component{
constructor(props) {
super(props);
this.state = {
results: this.props.location.state.data.results,
keyword: this.props.location.state.data.keyword,
pageOfItems: [],
cities: {
'New York City (NYC)': false,
'Delhi': false,
'Bangkok': false,
'Paris': false,
'Mexico City': false
},
topics: {
'Environment': false,
'Crime': false,
'Politics': false,
'Social Unrest': false,
'Infrastructure': false
},
languages: {
'Hindi': false,
'English': false,
'Thai': false,
'French': false,
'Spanish': false
}
};
this.onChangePage = this.onChangePage.bind(this);
this.onCityChange = this.onCityChange.bind(this);
}What I am trying to do is, whenever a checkbox is checked or unchecked I am setting the corresponding checkbox to true/false. Based on this boolean value of each checkbox I am filtering out the results and then rendering it on the UI. I am able to filter the results when a checkbox is clicked, but I am unable to show all the results back when the checkbox is unchecked. This is how I am handling when checkbox changes.
onCityChange(e) {
const val = e.target.checked;
const name = e.target.name;
let updatedCities = Object.assign({},this.state.cities,{[name]: val});
this.setState({
cities: updatedCities,
},function () {
const filteredCities = [];
for (let key in this.state.cities) {
if (this.state.cities[key] === true) {
filteredCities.push(key)
}
}
const filteredResults = [];
this.state.results.forEach((result) => {
for (let i = 0; i < filteredCities.length; i++) {
if (result.city === filteredCities[i] && result.city != null) {
filteredResults.push(result)
}
}
})
console.log(filteredResults.length)
if (filteredResults.length > 0) {
this.setState({
results: filteredResults
})
}
})
}I know I am not correctly handling the state, what can I do in this situation. For better reference, here is the complete Search Result code.
import React from 'react';
import NavigationBar from './NavigationBar';
import SearchPageResultsStyle from "../assets/css/SearchResultsPage.css"
import Pagination from './Pagination';
class SearchResultsPage extends React.Component{
constructor(props) {
super(props);
this.state = {
results: this.props.location.state.data.results,
keyword: this.props.location.state.data.keyword,
pageOfItems: [],
cities: {
'New York City (NYC)': false,
'Delhi': false,
'Bangkok': false,
'Paris': false,
'Mexico City': false
},
topics: {
'Environment': false,
'Crime': false,
'Politics': false,
'Social Unrest': false,
'Infrastructure': false
},
languages: {
'Hindi': false,
'English': false,
'Thai': false,
'French': false,
'Spanish': false
}
};
this.onChangePage = this.onChangePage.bind(this);
this.onCityChange = this.onCityChange.bind(this);
}
onChangePage(pageOfItems) {
// update local state with new page of items
this.setState({pageOfItems});
}
// setting each city in cities object (city chechboxes which are clicked on UI) to true
onCityChange(e) {
const val = e.target.checked;
const name = e.target.name;
let updatedCities = Object.assign({},this.state.cities,{[name]: val});
this.setState({
cities: updatedCities,
},function () {
const filteredCities = [];
for (let key in this.state.cities) {
if (this.state.cities[key] === true) {
filteredCities.push(key)
}
}
const filteredResults = [];
this.state.results.forEach((result) => {
for (let i = 0; i < filteredCities.length; i++) {
if (result.city === filteredCities[i] && result.city != null) {
filteredResults.push(result)
}
}
})
console.log(filteredResults.length)
if (filteredResults.length > 0) {
this.setState({
results: filteredResults
})
}
})
}
// rendering checkboxes for topics
renderCityFilter() {
const cities = ['New York City (NYC)','Delhi','Bangkok','Paris','Mexico City']
return cities.map((city,i) => {
return (
<div key={i} className={'city-filters'}>
<input
type="checkbox"
name={city}
onChange={this.onCityChange}
value={this.state.cities[city]}/>
<label key={i} style={{fontSize:12}}>
{city}
</label>
</div>
)
})
}
// rendering checkboxes for topics
renderTopicFilter() {
const topics = ['Environment','Crime','Politics','Social Unrest','Infrastructure']
return topics.map((topic,i) => {
return (
<div key={i}>
<input
type="checkbox"
name={topic}
onChange={this.onCityChange}
value={this.state.topics[topic]}/>
<label key={i} style={{fontSize:12}}>
{topic}
</label>
</div>
)
})
}
// rendering checkboxes for languages
renderLanguageFilter() {
const languages = ['Hindi','English','Thai','French','Spanish']
return languages.map((language,i) => {
return (
<div key={i}>
<input
type="checkbox"
name={language}
onChange={this.onCityChange}
value={this.state.languages[language]}/>
<label key={i} style={{fontSize:12}}>
{language}
</label>
</div>
)
})
}
render() {
const renderItems = this.state.pageOfItems.map((item, index) => {
return (
<div key={index}>
<h3 style={{color: '#1a0dab'}} key={index}>{item.text}</h3>
<a href={'https://google.com'} key={index}>{item.tweetUrl}</a>
<br/>
<p><span style={{fontWeight:'bold', textColor:'#6a6a6a'}} key={index}>topic: </span>{item.topic}</p>
<p><span style={{fontWeight:'bold', textColor:'#6a6a6a'}} key={index}>city: </span>{item.city}</p>
<p><span style={{fontWeight:'bold', textColor:'#6a6a6a'}} key={index}>lang: </span>{item.lang}</p>
<p><span style={{fontWeight:'bold', textColor:'#6a6a6a'}} key={index}>Hashtags: </span></p>
<hr/>
</div>
)
});
return (
<div>
<NavigationBar/>
<h4 style={{textAlign:'center', color:'#1a0dab'}}>Showing search results for <span style={{fontWeight:'bold', fontStyle:'Italic'}}>'{this.state.keyword}'</span></h4>
<hr/>
<div className={'wrap'} style={SearchPageResultsStyle}>
<div className={'fleft'}>
<h4>City</h4>
{this.renderCityFilter()}
<hr/>
<h4>Topics</h4>
{this.renderTopicFilter()}
<hr/>
<h4>Language</h4>
{this.renderLanguageFilter()}
<hr/>
</div>
<div className={'fcenter'}>
{renderItems}
<Pagination items={this.state.results} onChangePage={this.onChangePage}/>
</div>
<div className={'fright'}/>
</div>
</div>
)
}
}
export default SearchResultsPage;