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autocomplete-demo.ts
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autocomplete-demo.ts
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import {Component, ViewChild, ViewEncapsulation} from '@angular/core';
import {FormControl, NgModel} from '@angular/forms';
import 'rxjs/add/operator/startWith';
import 'rxjs/add/operator/map';
export interface State {
code: string;
name: string;
}
export interface StateGroup {
letter: string;
states: State[];
}
@Component({
moduleId: module.id,
selector: 'autocomplete-demo',
templateUrl: 'autocomplete-demo.html',
styleUrls: ['autocomplete-demo.css'],
encapsulation: ViewEncapsulation.None
})
export class AutocompleteDemo {
stateCtrl: FormControl;
currentState = '';
currentGroupedState = '';
topHeightCtrl = new FormControl(0);
reactiveStates: any;
tdStates: any[];
tdDisabled = false;
@ViewChild(NgModel) modelDir: NgModel;
groupedStates: StateGroup[];
filteredGroupedStates: StateGroup[];
states: State[] = [
{code: 'AL', name: 'Alabama'},
{code: 'AK', name: 'Alaska'},
{code: 'AZ', name: 'Arizona'},
{code: 'AR', name: 'Arkansas'},
{code: 'CA', name: 'California'},
{code: 'CO', name: 'Colorado'},
{code: 'CT', name: 'Connecticut'},
{code: 'DE', name: 'Delaware'},
{code: 'FL', name: 'Florida'},
{code: 'GA', name: 'Georgia'},
{code: 'HI', name: 'Hawaii'},
{code: 'ID', name: 'Idaho'},
{code: 'IL', name: 'Illinois'},
{code: 'IN', name: 'Indiana'},
{code: 'IA', name: 'Iowa'},
{code: 'KS', name: 'Kansas'},
{code: 'KY', name: 'Kentucky'},
{code: 'LA', name: 'Louisiana'},
{code: 'ME', name: 'Maine'},
{code: 'MD', name: 'Maryland'},
{code: 'MA', name: 'Massachusetts'},
{code: 'MI', name: 'Michigan'},
{code: 'MN', name: 'Minnesota'},
{code: 'MS', name: 'Mississippi'},
{code: 'MO', name: 'Missouri'},
{code: 'MT', name: 'Montana'},
{code: 'NE', name: 'Nebraska'},
{code: 'NV', name: 'Nevada'},
{code: 'NH', name: 'New Hampshire'},
{code: 'NJ', name: 'New Jersey'},
{code: 'NM', name: 'New Mexico'},
{code: 'NY', name: 'New York'},
{code: 'NC', name: 'North Carolina'},
{code: 'ND', name: 'North Dakota'},
{code: 'OH', name: 'Ohio'},
{code: 'OK', name: 'Oklahoma'},
{code: 'OR', name: 'Oregon'},
{code: 'PA', name: 'Pennsylvania'},
{code: 'RI', name: 'Rhode Island'},
{code: 'SC', name: 'South Carolina'},
{code: 'SD', name: 'South Dakota'},
{code: 'TN', name: 'Tennessee'},
{code: 'TX', name: 'Texas'},
{code: 'UT', name: 'Utah'},
{code: 'VT', name: 'Vermont'},
{code: 'VA', name: 'Virginia'},
{code: 'WA', name: 'Washington'},
{code: 'WV', name: 'West Virginia'},
{code: 'WI', name: 'Wisconsin'},
{code: 'WY', name: 'Wyoming'},
];
constructor() {
this.tdStates = this.states;
this.stateCtrl = new FormControl({code: 'CA', name: 'California'});
this.reactiveStates = this.stateCtrl.valueChanges
.startWith(this.stateCtrl.value)
.map(val => this.displayFn(val))
.map(name => this.filterStates(name));
this.filteredGroupedStates = this.groupedStates = this.states.reduce((groups, state) => {
let group = groups.find(g => g.letter === state.name[0]);
if (!group) {
group = { letter: state.name[0], states: [] };
groups.push(group);
}
group.states.push({ code: state.code, name: state.name });
return groups;
}, [] as StateGroup[]);
}
displayFn(value: any): string {
return value && typeof value === 'object' ? value.name : value;
}
filterStates(val: string) {
return val ? this._filter(this.states, val) : this.states;
}
filterStateGroups(val: string) {
if (val) {
return this.groupedStates
.map(group => ({ letter: group.letter, states: this._filter(group.states, val) }))
.filter(group => group.states.length > 0);
}
return this.groupedStates;
}
private _filter(states: State[], val: string) {
const filterValue = val.toLowerCase();
return states.filter(state => state.name.toLowerCase().startsWith(filterValue));
}
}