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annotate showajax.js.php @ 1069:5f92fa5e683a

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Refactor how the "AJAX" stuff works.
author Matti Hamalainen <ccr@tnsp.org>
date Tue, 24 Jan 2017 17:25:48 +0200
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children 76e11ae923a7
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1069
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1 <?php
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2 header("Content-Type: application/javascript");
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3 require_once "mconfig.inc.php";
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4 require_once "msite.inc.php";
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5 require_once "msession.inc.php";
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6 ?>
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7 //
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8 // FAPWeb - Simple Web-based Demoparty Management System
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9 // Party main screen viewer
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10 // (C) Copyright 2012-2017 Tecnic Software productions (TNSP)
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11 //
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12 <?php
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13 stCommonAJAX("showajax.php", "show.php");
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14 ?>
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15
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16 var failCount = 0;
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17 var lastUpdate = 0;
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18 var errorView = false;
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19
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20
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21 function updateView(txt)
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22 {
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23 var view = document.getElementById("mainView");
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24 if (view && txt != false && txt != "")
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25 view.innerHTML = txt;
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26 }
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27
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28
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29 function displayError()
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30 {
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31 // Increase failure count
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32 if (++failCount >= 3 && !errorView)
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33 {
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34 errorView = true;
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35 updateView("<div class=\"slideHeader\"><div class=\"slideHeaderDiv\"></div></div><div class=\"slideText\"><div class=\"guru\">Software Failure.&nbsp;&nbsp;&nbsp;Press left mouse button to continue.<br />Guru Meditation #00000004.0000AAC0</div></div>");
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36 }
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37 }
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38
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39
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40 //
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41 // Update view when triggered by main tick
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42 //
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43 function viewChanged()
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44 {
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45 var msuccess2 = function(txt)
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46 {
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47 // Successfully fetched new data, initiate view update
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48 updateView(txt);
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49 }
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50
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51 var msuccess1 = function(txt)
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52 {
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53 lastUpdate = txt;
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54 jsSendPOSTRequest("action=get&type=slide", msuccess2, displayError);
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55 }
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56
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57 jsSendPOSTRequest("action=get&type=update", msuccess1, displayError);
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58 }
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59
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60
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61 function setTickUpdate(qtime)
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62 {
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63 if (!timeOutSet)
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64 {
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65 timeOutSet = true;
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66 setTimeout(function() { tickMain(); }, qtime);
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67 }
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68 }
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69
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70
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71 //
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72 // Main tick function, check for updates from server
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73 //
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74 function tickMain()
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75 {
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76 timeOutSet = false;
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77
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78 var msuccess = function(txt)
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79 {
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80 failCount = 0;
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81 if (txt == "changed")
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82 {
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83 viewChanged();
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84 setTickUpdate(250);
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85 }
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86 else
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87 if (txt == "reload")
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88 {
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89 location.reload();
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90 }
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91 else
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92 {
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93 setTickUpdate(500);
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94 }
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95 }
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96
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97 var mfail = function(txt)
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98 {
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99 displayError();
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100 setTickUpdate(5000);
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101 }
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102
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103 jsSendPOSTRequest("action=check&lastUpdate="+lastUpdate, msuccess, mfail);
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104 }
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105
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106 var timeOutSet = false;
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107
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108 document.addEventListener("DOMContentLoaded",
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109 function ()
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110 {
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111 setTickUpdate(100);
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112 viewChanged();
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113 });
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114