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13 | var d = require("debug")("raptorjs:pager")
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14 |
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15 | class Pager {
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16 |
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17 | constructor(json) {
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18 |
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19 | const defaults = {
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20 | content: [],
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21 | last: true,
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22 | totalPages: 0,
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23 | totalElements: 0,
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24 | sort: [],
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25 | first: true,
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26 | numberOfElements: 0,
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27 | size: 25,
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28 | number: 0
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29 | }
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30 |
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31 | this.json = Object.assign({}, defaults, json)
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32 | }
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33 |
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34 | getContent() {
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35 | return this.json.content || []
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36 | }
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37 |
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38 | isFirst() {
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39 | return this.json.first
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40 | }
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41 |
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42 | isLast() {
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43 | return this.json.last
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44 | }
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45 |
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46 | getPage() {
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47 | return this.json.page
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48 | }
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49 |
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50 | getTotalPages() {
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51 | return this.json.totalPages
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52 | }
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53 |
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54 | getTotalElements() {
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55 | return this.json.totalElements
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56 | }
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57 |
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58 | getNumberOfElements() {
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59 | return this.json.numberOfElements
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60 | }
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61 |
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62 | getSize() {
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63 | return this.json.size
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64 | }
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65 |
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66 | getSort(key) {
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67 | if(!key) return this.json.sort
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68 | const keys = this.json.sort.filter((s) => s.property === key)
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69 | return keys.length ? keys[0] : null
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70 | }
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71 |
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72 | }
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73 |
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74 | module.exports = Pager
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75 | module.exports.create = (raw, mapCallback) => {
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76 |
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77 | if(mapCallback && typeof mapCallback === "function") {
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78 | raw.content = raw.content.map(mapCallback)
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79 | }
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80 |
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81 | return new Pager(raw)
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82 | }
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83 |
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84 | module.exports.buildQuery = (pageOptions, q) => {
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85 | const query = []
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86 |
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87 | if(pageOptions) {
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88 |
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89 | if(pageOptions.size && pageOptions.limit === undefined) {
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90 | pageOptions.limit = pageOptions.size
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91 | }
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92 |
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93 | if (pageOptions.page) {
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94 | query.push(`page=${pageOptions.page}`)
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95 | }
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96 | if (pageOptions.limit) {
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97 | query.push(`size=${pageOptions.limit}`)
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98 | }
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99 | if (pageOptions.sort) {
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100 | pageOptions.sortDir = pageOptions.sortDir.toLowerCase() === "desc" ? "desc" : "asc"
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101 | query.push(`sort=${pageOptions.sort},${pageOptions.sortDir}`)
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102 | }
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103 | }
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104 |
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105 |
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106 | if(q) {
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107 | Object.keys(q).forEach((field) => {
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108 | const value = q[field]
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109 | query.push(`${field}=${value}`)
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110 | })
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111 | }
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112 |
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113 | return (query.length) ? encodeURI(`?${query.join("&")}`) : ""
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114 | }
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