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| 1 | +import Ractive from 'ractive'; |
| 2 | +import xhttp from 'xhttp'; |
| 3 | +import _ from 'lodash'; |
| 4 | + |
| 5 | +export default Ractive.extend({ // jshint ignore:line |
| 6 | + template: require('./Home.html'), |
| 7 | + data() { |
| 8 | + return { |
| 9 | + loading: true, |
| 10 | + search_index: 0 |
| 11 | + } |
| 12 | + }, |
| 13 | + computed: { |
| 14 | + search_results() { |
| 15 | + let { data, search } = this.get(); |
| 16 | + search = search.trim().toLowerCase(); |
| 17 | + if (search.trim().length > 0) { |
| 18 | + return _.filter(data, user => user.first.startsWith(search) || user.last.startsWith(search)) || []; |
| 19 | + } else { |
| 20 | + return [] |
| 21 | + } |
| 22 | + } |
| 23 | + }, |
| 24 | + oninit() { |
| 25 | + let page_size = 500; |
| 26 | + |
| 27 | + this.observe({ |
| 28 | + search: () => this.set({ search_index: 0 }) // Reset index on new search |
| 29 | + }); |
| 30 | + |
| 31 | + // Request first page of data, up to page_size results: |
| 32 | + xhttp({ method: 'get', url: `/api/data?size=${page_size}`}) |
| 33 | + .then(data => { |
| 34 | + // Get total results from first request: |
| 35 | + let total_results = data.total; |
| 36 | + |
| 37 | + // Display first results and total: |
| 38 | + this.set({ |
| 39 | + data: data.results, |
| 40 | + total: total_results |
| 41 | + }); |
| 42 | + |
| 43 | + // If results length < page size, we are done; otherwise queue up requests: |
| 44 | + if (total_results > page_size) { |
| 45 | + |
| 46 | + // Build array of page start indexes: |
| 47 | + let page_indexes = _.range(page_size, total_results, page_size); |
| 48 | + |
| 49 | + // Create array of promises for requesting each page, then appending results: |
| 50 | + let page_requests = |
| 51 | + page_indexes.map(start_index => () => { |
| 52 | + return xhttp({ method: 'get', url: `/api/data?size=${page_size}&start=${start_index}`}) |
| 53 | + .then(data => this.push('data', ...data.results)); // Appends data |
| 54 | + }); |
| 55 | + |
| 56 | + // Sets loading indicator to false when all requests are complete: |
| 57 | + page_requests.push(() => this.set({ loading: false })); |
| 58 | + |
| 59 | + // This calls the promises above in sequence: |
| 60 | + page_requests.reduce((promise, next_request) => promise.then(next_request), Promise.resolve()); |
| 61 | + |
| 62 | + // Parallel |
| 63 | +// let page_requests = |
| 64 | +// page_indexes.map(start_index => new Promise(() => {xhttp({ method: 'get', url: `/api/data?size=${page_size}&start=${start_index}`}) |
| 65 | +// .then(data => this.push('data', ...data.results))); // Appends data |
| 66 | +// // Start all requests, set loading indicator to false when all are complete: |
| 67 | +// Promise.all(page_requests) |
| 68 | +// .then(data => this.set({ loading: false })) |
| 69 | +// .catch(err => console.error); |
| 70 | + } |
| 71 | + }) |
| 72 | + .catch(err => console.error); |
| 73 | + } |
| 74 | +}); |
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