869 lines
32 KiB
HTML
869 lines
32 KiB
HTML
<!doctype html>
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<html class="no-js" lang="">
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<head>
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<meta charset="utf-8">
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<meta http-equiv="x-ua-compatible" content="ie=edge">
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<title>hometask documentation</title>
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<meta name="description" content="">
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<link rel="icon" type="image/x-icon" href="../images/favicon.ico">
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<link rel="stylesheet" href="../styles/style.css">
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<link rel="stylesheet" href="../styles/dark.css">
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<link rel="stylesheet" href="../styles/readthedocs.css">
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</head>
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<body>
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<div class="navbar navbar-default navbar-fixed-top visible-xs">
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<a href="../" class="navbar-brand">hometask documentation</a>
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<button type="button" class="btn btn-default btn-menu ion-ios-menu" id="btn-menu"></button>
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</div>
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<div class="xs-menu menu" id="mobile-menu">
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<div id="book-search-input" role="search"><input type="text" placeholder="Type to search"></div> <compodoc-menu></compodoc-menu>
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</div>
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<div class="container-fluid main">
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<div class="row main">
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<div class="hidden-xs menu">
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<compodoc-menu mode="normal"></compodoc-menu>
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</div>
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<!-- START CONTENT -->
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<div class="content injectable">
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<div class="content-data">
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<ol class="breadcrumb">
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<li>Injectables</li>
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<li >PageInterceptor</li>
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</ol>
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<ul class="nav nav-tabs" role="tablist">
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<li class="active">
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<a href="#info" role="tab" id="info-tab" data-toggle="tab" data-link="info">Info</a>
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</li>
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<li >
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<a href="#source" role="tab" id="source-tab" data-toggle="tab" data-link="source">Source</a>
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</li>
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</ul>
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<div class="tab-content">
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<div class="tab-pane fade active in" id="c-info">
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<p class="comment">
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<h3>File</h3>
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</p>
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<p class="comment">
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<code>src/core/interceptors/page.interceptor.ts</code>
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</p>
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<p class="comment">
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<h3>Description</h3>
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</p>
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<p class="comment">
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<p>Pagination-implementing interceptor</p>
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</p>
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<section>
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<h3 id="index">Index</h3>
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<table class="table table-sm table-bordered index-table">
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<tbody>
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<tr>
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<td class="col-md-4">
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<h6><b>Properties</b></h6>
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</td>
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</tr>
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<tr>
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<td class="col-md-4">
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<ul class="index-list">
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<li>
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<span class="modifier">Private</span>
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<span class="modifier">Readonly</span>
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<a href="#ES_PORT" >ES_PORT</a>
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</li>
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<li>
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<span class="modifier">Private</span>
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<a href="#prevSearch" >prevSearch</a>
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</li>
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</ul>
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</td>
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</tr>
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<tr>
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<td class="col-md-4">
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<h6><b>Methods</b></h6>
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</td>
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</tr>
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<tr>
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<td class="col-md-4">
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<ul class="index-list">
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<li>
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<span class="modifier">Async</span>
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<a href="#deletePIT" >deletePIT</a>
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</li>
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<li>
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<span class="modifier">Public</span>
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<span class="modifier">Async</span>
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<a href="#getPIT" >getPIT</a>
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</li>
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<li>
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<span class="modifier">Async</span>
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<a href="#intercept" >intercept</a>
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</li>
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</ul>
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</td>
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</tr>
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</tbody>
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</table>
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</section>
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<section>
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<h3 id="constructor">Constructor</h3>
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<table class="table table-sm table-bordered">
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<tbody>
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<tr>
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<td class="col-md-4">
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<code>constructor(httpService: HttpService)</code>
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</td>
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</tr>
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<tr>
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<td class="col-md-4">
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<div class="io-line">Defined in <a href="" data-line="59" class="link-to-prism">src/core/interceptors/page.interceptor.ts:59</a></div>
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</td>
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</tr>
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<tr>
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<td class="col-md-4">
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<div class="io-description"><p>Injects needed dependencies and instantiates the storage object</p>
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</div>
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<div>
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<b>Parameters :</b>
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<table class="params">
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<thead>
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<tr>
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<td>Name</td>
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<td>Type</td>
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<td>Optional</td>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td>httpService</td>
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<td>
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<code>HttpService</code>
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</td>
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<td>
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No
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</td>
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</tr>
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</tbody>
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</table>
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</div>
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</td>
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</tr>
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</tbody>
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</table>
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</section>
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<section>
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<h3 id="methods">
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Methods
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</h3>
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<table class="table table-sm table-bordered">
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<tbody>
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<tr>
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<td class="col-md-4">
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<a name="deletePIT"></a>
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<span class="name">
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<span class="modifier">Async</span>
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<span ><b>deletePIT</b></span>
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<a href="#deletePIT"><span class="icon ion-ios-link"></span></a>
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</span>
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</td>
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</tr>
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<tr>
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<td class="col-md-4">
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<span class="modifier-icon icon ion-ios-reset"></span>
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<code>deletePIT(pitID: <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/string" target="_blank">string</a>)</code>
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</td>
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</tr>
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<tr>
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<td class="col-md-4">
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<div class="io-line">Defined in <a href="" data-line="180"
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class="link-to-prism">src/core/interceptors/page.interceptor.ts:180</a></div>
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</td>
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</tr>
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<tr>
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<td class="col-md-4">
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<div class="io-description"><p>Deletes the PIT specified by provided ID</p>
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</div>
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<div class="io-description">
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<b>Parameters :</b>
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<table class="params">
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<thead>
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<tr>
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<td>Name</td>
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<td>Type</td>
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<td>Optional</td>
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<td>Description</td>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td>pitID</td>
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<td>
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<code><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/string" target="_blank" >string</a></code>
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</td>
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<td>
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No
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</td>
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<td>
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<p>, ID of the PIT, that would be deleted</p>
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</td>
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</tr>
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</tbody>
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</table>
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</div>
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<div>
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</div>
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<div class="io-description">
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<b>Returns : </b> <code>Promise<boolean></code>
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</div>
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<div class="io-description">
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<p>true/false, depending on the result of deletion of the PIT</p>
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</div>
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</td>
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</tr>
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</tbody>
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</table>
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<table class="table table-sm table-bordered">
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<tbody>
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<tr>
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<td class="col-md-4">
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<a name="getPIT"></a>
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<span class="name">
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<span class="modifier">Public</span>
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<span class="modifier">Async</span>
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<span ><b>getPIT</b></span>
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<a href="#getPIT"><span class="icon ion-ios-link"></span></a>
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</span>
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</td>
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</tr>
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<tr>
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<td class="col-md-4">
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<span class="modifier-icon icon ion-ios-reset"></span>
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<code>getPIT(alive: <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/number" target="_blank">number</a>, unit: <a href="../undefineds/EsTime.html" target="_self">EsTime</a>)</code>
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</td>
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</tr>
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<tr>
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<td class="col-md-4">
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<div class="io-line">Defined in <a href="" data-line="160"
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class="link-to-prism">src/core/interceptors/page.interceptor.ts:160</a></div>
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</td>
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</tr>
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<tr>
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<td class="col-md-4">
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<div class="io-description"><p>Acquires a PIT ID from Elasticsearch, needed for a request</p>
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</div>
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<div class="io-description">
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<b>Parameters :</b>
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<table class="params">
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<thead>
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<tr>
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<td>Name</td>
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<td>Type</td>
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<td>Optional</td>
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<td>Default value</td>
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<td>Description</td>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td>alive</td>
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<td>
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<code><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/number" target="_blank" >number</a></code>
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</td>
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<td>
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No
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</td>
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<td>
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</td>
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<td>
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<p>, amount of time in minutes (defaults to 1). If time unit is not specified - defaults to minutes.</p>
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</td>
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</tr>
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<tr>
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<td>unit</td>
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<td>
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<code><a href="../miscellaneous/enumerations.html#EsTime" target="_self" >EsTime</a></code>
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</td>
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<td>
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No
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</td>
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<td>
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<code>EsTime.min</code>
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</td>
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<td>
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</td>
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</tr>
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</tbody>
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</table>
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</div>
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<div>
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</div>
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<div class="io-description">
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<b>Returns : </b> <code><a href="../interfaces/EsPit.html" target="_self" >Promise<EsPit></a></code>
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</div>
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<div class="io-description">
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<p>PIT object <EsPit> containing PIT ID and keep_alive value</p>
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</div>
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</td>
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</tr>
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</tbody>
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</table>
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<table class="table table-sm table-bordered">
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<tbody>
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<tr>
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<td class="col-md-4">
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<a name="intercept"></a>
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<span class="name">
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<span class="modifier">Async</span>
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<span ><b>intercept</b></span>
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<a href="#intercept"><span class="icon ion-ios-link"></span></a>
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</span>
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</td>
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</tr>
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<tr>
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<td class="col-md-4">
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<span class="modifier-icon icon ion-ios-reset"></span>
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<code>intercept(context: ExecutionContext, next: CallHandler<any>)</code>
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</td>
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</tr>
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<tr>
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<td class="col-md-4">
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<div class="io-line">Defined in <a href="" data-line="75"
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class="link-to-prism">src/core/interceptors/page.interceptor.ts:75</a></div>
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</td>
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</tr>
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<tr>
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<td class="col-md-4">
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<div class="io-description"><p>Override of intercept() method, specified in NestInterceptor interface</p>
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</div>
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<div class="io-description">
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<b>Parameters :</b>
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<table class="params">
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<thead>
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<tr>
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<td>Name</td>
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<td>Type</td>
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<td>Optional</td>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td>context</td>
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<td>
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<code>ExecutionContext</code>
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</td>
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<td>
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No
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</td>
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</tr>
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<tr>
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<td>next</td>
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<td>
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<code>CallHandler<any></code>
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</td>
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<td>
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No
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</td>
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</tr>
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</tbody>
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</table>
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</div>
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<div>
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</div>
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<div class="io-description">
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<b>Returns : </b> <code><a href="../classes/PageDto.html" target="_self" >Promise<Observable<PageDto>></a></code>
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</div>
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<div class="io-description">
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<p>Page with content and metadata</p>
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</div>
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</td>
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</tr>
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</tbody>
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</table>
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</section>
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<section>
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<h3 id="inputs">
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Properties
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</h3>
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<table class="table table-sm table-bordered">
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<tbody>
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<tr>
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<td class="col-md-4">
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<a name="ES_PORT"></a>
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<span class="name">
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<span class="modifier">Private</span>
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<span class="modifier">Readonly</span>
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<span ><b>ES_PORT</b></span>
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<a href="#ES_PORT"><span class="icon ion-ios-link"></span></a>
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</span>
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</td>
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</tr>
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<tr>
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<td class="col-md-4">
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<i>Default value : </i><code>process.env.ES_PORT</code>
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</td>
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</tr>
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<tr>
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<td class="col-md-4">
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<div class="io-line">Defined in <a href="" data-line="148" class="link-to-prism">src/core/interceptors/page.interceptor.ts:148</a></div>
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</td>
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</tr>
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<tr>
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<td class="col-md-4">
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<div class="io-description"><p>Elastichsearch server port-number</p>
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</div>
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</td>
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</tr>
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</tbody>
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</table>
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<table class="table table-sm table-bordered">
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<tbody>
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<tr>
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<td class="col-md-4">
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<a name="prevSearch"></a>
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<span class="name">
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<span class="modifier">Private</span>
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<span ><b>prevSearch</b></span>
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<a href="#prevSearch"><span class="icon ion-ios-link"></span></a>
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</span>
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</td>
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</tr>
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<tr>
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<td class="col-md-4">
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<i>Type : </i> <code><a href="../classes/PrevSearch.html" target="_self" >PrevSearch</a></code>
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</td>
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</tr>
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<tr>
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<td class="col-md-4">
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<div class="io-line">Defined in <a href="" data-line="153" class="link-to-prism">src/core/interceptors/page.interceptor.ts:153</a></div>
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</td>
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</tr>
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<tr>
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<td class="col-md-4">
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<div class="io-description"><p>Info about previously completed search</p>
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</div>
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</td>
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</tr>
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</tbody>
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</table>
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</section>
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</div>
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<div class="tab-pane fade tab-source-code" id="c-source">
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<pre class="line-numbers compodoc-sourcecode"><code class="language-typescript">import { HttpService } from "@nestjs/axios";
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import { CallHandler, ExecutionContext, Injectable, NestInterceptor } from "@nestjs/common";
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import { reverse } from "dns";
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import { Observable, map, take } from "rxjs";
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import { EsResponseDto, PageDto } from "../domain/dtos";
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import { EsQueryDto } from "../domain/dtos/es-query.dto";
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import { RequestDto } from "../domain/dtos/request.dto";
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import { SearchQueryDto } from "../domain/dtos/search-q.dto";
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import { SearchResultDto } from "../domain/dtos/search-result.dto";
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import { EsTime } from "../domain/enums/es-time.enum";
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import { Order } from "../domain/enums/page-order.enum";
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import { PageMeta } from "../domain/interfaces";
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import { EsPit } from "../domain/interfaces/es-pit.interface";
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import { SearchInfo } from "../domain/interfaces/search-info.interface";
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import { SearchService } from "../services/common/search.service";
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/**
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* Previous search data storage
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*/
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class PrevSearch implements SearchInfo {
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/**
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* Constructs an uninitialized object
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*/
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constructor() {
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this.pit = undefined;
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|
this.tiebreaker = undefined;
|
|
this.prevPage = -1;
|
|
}
|
|
|
|
/**
|
|
* PIT object of the previous search
|
|
*/
|
|
pit: EsPit;
|
|
|
|
/**
|
|
* Tiebreaker and sort parameters
|
|
*/
|
|
tiebreaker: unknown[];
|
|
|
|
/**
|
|
* Number of the previous page
|
|
*/
|
|
prevPage: number;
|
|
|
|
/**
|
|
* Checks if there was the search before current one
|
|
* @returns true/false, showing whether or not there was another search before
|
|
*/
|
|
public isSet(): boolean {
|
|
if (this.pit && this.tiebreaker && this.prevPage !== -1) return true;
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Pagination-implementing interceptor
|
|
*/
|
|
@Injectable()
|
|
export class PageInterceptor implements NestInterceptor {
|
|
/**
|
|
* Injects needed dependencies and instantiates the storage object
|
|
* @param httpService
|
|
* @param searchService
|
|
*/
|
|
constructor(private readonly httpService: HttpService) {
|
|
this.prevSearch = new PrevSearch;
|
|
}
|
|
|
|
/**
|
|
* Override of intercept() method, specified in NestInterceptor interface
|
|
* @param context
|
|
* @param next
|
|
* @returns Page with content and metadata
|
|
*/
|
|
async intercept(context: ExecutionContext, next: CallHandler<any>): Promise<Observable<PageDto>> {
|
|
let request: RequestDto = context.switchToHttp().getRequest<RequestDto>();
|
|
const query: SearchQueryDto = request.query;
|
|
let reverse: boolean = false;
|
|
|
|
request.es_query = new EsQueryDto();
|
|
|
|
request.es_query.query = {
|
|
query_string: {
|
|
query: query.query,
|
|
default_field: 'content',
|
|
}
|
|
};
|
|
request.es_query.sort = [
|
|
{ _score: { order: !query?.order ? Order.DESC : query.order } },
|
|
{ _shard_doc: 'desc' }
|
|
];
|
|
|
|
if (this.prevSearch.isSet()) {
|
|
request.es_query.pit = this.prevSearch.pit;
|
|
request.es_query.search_after = this.prevSearch.tiebreaker;
|
|
|
|
let limit = !query?.limit ? 10 : query.limit;
|
|
request.es_query.size = limit * Math.abs(query.page - this.prevSearch.prevPage);
|
|
|
|
if (query.page < this.prevSearch.prevPage) {
|
|
request.es_query.sort = [{ _score: { order: 'asc' } }];
|
|
request.es_query.size += limit - 1;
|
|
reverse = true;
|
|
} else if (query.page == this.prevSearch.prevPage) {
|
|
//...
|
|
}
|
|
} else {
|
|
this.prevSearch.pit = request.es_query.pit = await this.getPIT(1);
|
|
request.es_query.size = !query?.limit ? 10 : query.limit;
|
|
}
|
|
|
|
return next.handle().pipe(
|
|
map((res) => {
|
|
// Setting the page meta-data
|
|
let meta: PageMeta = {
|
|
total: res.hits.total.value,
|
|
pagenum: !query?.page ? 1 : query.page,
|
|
order: query?.order?.toUpperCase() === Order.ASC ? Order.ASC : Order.DESC,
|
|
hasNext: false,
|
|
hasPrev: false,
|
|
pagesize: !query?.limit ? 10 : query.limit,
|
|
};
|
|
// meta.hasNext = res.hits.hits[meta.pagenum * meta.pagesize] ? true : false;
|
|
// meta.hasPrev = res.hits.hits[(meta.pagenum - 1) * meta.pagesize - 1] ? true: false;
|
|
|
|
// Saving the search info
|
|
this.prevSearch.pit.id = res.pit_id;
|
|
this.prevSearch.tiebreaker = res.hits.hits[res.hits.hits.length - 1].sort;
|
|
this.prevSearch.prevPage = query.page;
|
|
|
|
let data = res.hits.hits.slice(-meta.pagesize);
|
|
if (reverse) {
|
|
console.log('REVERSE');
|
|
this.prevSearch.tiebreaker = data[0].sort;
|
|
data.reverse();
|
|
reverse = false;
|
|
}
|
|
|
|
// Return the page
|
|
return new PageDto(data, meta);
|
|
})
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Elastichsearch server port-number
|
|
*/
|
|
private readonly ES_PORT = process.env.ES_PORT;
|
|
|
|
/**
|
|
* Info about previously completed search
|
|
*/
|
|
private prevSearch: PrevSearch;
|
|
|
|
/**
|
|
* Acquires a PIT ID from Elasticsearch, needed for a request
|
|
* @param alive, amount of time in minutes (defaults to 1). If time unit is not specified - defaults to minutes.
|
|
* @returns PIT object <EsPit> containing PIT ID and keep_alive value
|
|
*/
|
|
public async getPIT(alive: number, unit: EsTime = EsTime.min): Promise<EsPit> {
|
|
return new Promise((resolve, reject) => {
|
|
try {
|
|
(this.httpService.post<EsPit>(`http://localhost:${this.ES_PORT}/papers/_pit?keep_alive=${alive+unit}`)
|
|
.pipe(take(1), map(axiosRes => axiosRes.data))
|
|
.subscribe((res) => {
|
|
res.keep_alive = alive + unit;
|
|
resolve(res);
|
|
}));
|
|
} catch (error) {
|
|
reject(error);
|
|
}
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Deletes the PIT specified by provided ID
|
|
* @param pitID, ID of the PIT, that would be deleted
|
|
* @returns true/false, depending on the result of deletion of the PIT
|
|
*/
|
|
async deletePIT(pitID: string): Promise<boolean> {
|
|
return new Promise((resolve, reject) => {
|
|
try {
|
|
this.httpService.delete(`http://localhost:${this.ES_PORT}/_pit`, {
|
|
data: { id: pitID },
|
|
headers: { 'Content-Type': 'application/json' },
|
|
})
|
|
.pipe(take(1), map(axiosRes => axiosRes.data))
|
|
.subscribe((res) => {
|
|
resolve(res.succeeded);
|
|
});
|
|
} catch (error) {
|
|
reject(error);
|
|
}
|
|
})
|
|
}
|
|
}
|
|
/*
|
|
public saveInfo(pit: EsPit, tiebreaker: unknown[], page: number) {
|
|
this.pit.id = pit.id;
|
|
this.pit.keep_alive = pit.keep_alive;
|
|
|
|
this.tiebreaker = tiebreaker.slice();
|
|
|
|
this.prevPage = page;
|
|
}
|
|
|
|
public clearInfo() {
|
|
this.pit = undefined;
|
|
this.tiebreaker = undefined;
|
|
this.prevPage = -1;
|
|
}*/
|
|
|
|
// getQueryParams(str: string): any {
|
|
// let parameters: object = {};
|
|
// let pairs: string[] = str.split(',');
|
|
// parameters['main'] = pairs[0];
|
|
// pairs.shift();
|
|
|
|
// if(!pairs || pairs[0] === '') return parameters;
|
|
|
|
// for (const pair of pairs) {
|
|
// const key: string = pair.substring(0, pair.indexOf('='));
|
|
// const value: string = pair.substring(pair.indexOf('=') + 1);
|
|
// parameters[key] = value;
|
|
// }
|
|
|
|
// return parameters;
|
|
// }
|
|
|
|
|
|
/**
|
|
* OLD WAY PAGINATION
|
|
* // Setting the page data
|
|
// const data = res.hits.slice((meta.pagenum - 1) * meta.pagesize, meta.pagenum * meta.pagesize);
|
|
*/
|
|
|
|
|
|
// if (query.page == 1) {
|
|
// this.prevSearch.pit = request.es_query.pit = await this.getPIT(1);
|
|
// } else {
|
|
// if (!this.prevSearch.isSet()) {
|
|
// this.prevSearch.pit = request.es_query.pit = await this.getPIT(1);
|
|
|
|
// request.es_query.size = query.limit * (query.page - 1);
|
|
// this.searchService.findByContext(request.es_query).then((res: SearchResultDto) => {
|
|
// request.es_query.search_after = res.data.hits.hits[res.data.hits.hits.length - 1].sort;
|
|
// });
|
|
// } else {
|
|
// if (query.page == this.prevSearch.prevPage) {
|
|
// return;
|
|
// } else {
|
|
// request.es_query.pit = this.prevSearch.pit;
|
|
// request.es_query.search_after = this.prevSearch.tiebreaker;
|
|
// request.es_query.size = (query.page - this.prevSearch.prevPage);
|
|
// }
|
|
|
|
// // request.es_query.pit = this.prevSearch.pit;
|
|
// // request.es_query.search_after = this.prevSearch.tiebreaker;
|
|
// }
|
|
// }
|
|
</code></pre>
|
|
</div>
|
|
|
|
</div>
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
</div><div class="search-results">
|
|
<div class="has-results">
|
|
<h1 class="search-results-title"><span class='search-results-count'></span> results matching "<span class='search-query'></span>"</h1>
|
|
<ul class="search-results-list"></ul>
|
|
</div>
|
|
<div class="no-results">
|
|
<h1 class="search-results-title">No results matching "<span class='search-query'></span>"</h1>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<!-- END CONTENT -->
|
|
</div>
|
|
</div>
|
|
|
|
<label class="dark-mode-switch">
|
|
<input type="checkbox">
|
|
<span class="slider">
|
|
<svg class="slider-icon" viewBox="0 0 24 24" fill="none" height="20" stroke="#000" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" width="20" xmlns="http://www.w3.org/2000/svg">
|
|
<path d="M21 12.79A9 9 0 1111.21 3 7 7 0 0021 12.79z"></path>
|
|
</svg>
|
|
</span>
|
|
</label>
|
|
|
|
<script>
|
|
var COMPODOC_CURRENT_PAGE_DEPTH = 1;
|
|
var COMPODOC_CURRENT_PAGE_CONTEXT = 'injectable';
|
|
var COMPODOC_CURRENT_PAGE_URL = 'PageInterceptor.html';
|
|
var MAX_SEARCH_RESULTS = 15;
|
|
</script>
|
|
|
|
<script src="../js/libs/custom-elements.min.js"></script>
|
|
<script src="../js/libs/lit-html.js"></script>
|
|
|
|
<script src="../js/menu-wc.js" defer></script>
|
|
<script nomodule src="../js/menu-wc_es5.js" defer></script>
|
|
|
|
<script src="../js/libs/bootstrap-native.js"></script>
|
|
|
|
<script src="../js/libs/es6-shim.min.js"></script>
|
|
<script src="../js/libs/EventDispatcher.js"></script>
|
|
<script src="../js/libs/promise.min.js"></script>
|
|
<script src="../js/libs/zepto.min.js"></script>
|
|
|
|
<script src="../js/compodoc.js"></script>
|
|
|
|
<script src="../js/tabs.js"></script>
|
|
<script src="../js/menu.js"></script>
|
|
<script src="../js/libs/clipboard.min.js"></script>
|
|
<script src="../js/libs/prism.js"></script>
|
|
<script src="../js/sourceCode.js"></script>
|
|
<script src="../js/search/search.js"></script>
|
|
<script src="../js/search/lunr.min.js"></script>
|
|
<script src="../js/search/search-lunr.js"></script>
|
|
<script src="../js/search/search_index.js"></script>
|
|
<script src="../js/lazy-load-graphs.js"></script>
|
|
|
|
|
|
</body>
|
|
</html>
|