| Total Complexity | 116 |
| Complexity/F | 3.31 |
| Lines of Code | 376 |
| Function Count | 35 |
| Duplicated Lines | 0 |
| Ratio | 0 % |
| Changes | 38 | ||
| Bugs | 3 | Features | 1 |
Complex classes like add/table.js often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
| 1 | // https://addyosmani.com/resources/essentialjsdesignpatterns/book/#singletonpatternjavascript |
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| 2 | var TableSingleton = (function(){ |
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| 3 | // Instance stores a reference to the Singleton |
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| 4 | var instance; |
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| 5 | function initInstance(){ |
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| 6 | // Singleton |
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| 7 | // Private methods and variables |
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| 8 | function getParent(obj, objType){ |
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| 9 | while(obj && obj.tagName !== objType.toUpperCase()){ |
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| 10 | obj = obj.parentNode; |
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| 11 | } |
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| 12 | return obj; |
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| 13 | } |
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| 14 | function BuildRequest(rq, crntTableId, skipPropertyArray){ |
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| 15 | function checkSkip(skipProperty){ |
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| 16 | var result = false; |
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| 17 | if(skipPropertyArray && Object.prototype.toString |
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| 18 | .call(skipPropertyArray) === '[object Array]' |
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| 19 | ){ |
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| 20 | if(skipPropertyArray.indexOf(skipProperty) >= 0){ |
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| 21 | result = true; |
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| 22 | } |
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| 23 | } |
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| 24 | return result; |
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| 25 | }; |
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| 26 | function getSort(){ |
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| 27 | var thTags = document.getElementById(crntTableId) |
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| 28 | .getElementsByTagName("thead")[0] |
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| 29 | .getElementsByTagName("th"); |
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| 30 | var length = thTags.length; |
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| 31 | for(var i = 0; i < length; i++){ |
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| 32 | var link = thTags[i].getElementsByTagName("a")[0]; |
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| 33 | if(link){ |
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| 34 | var span = link.getElementsByTagName("span")[0]; |
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| 35 | if(span && setSortByFirstLinkFirstSpan(span, i)){ |
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| 36 | break; |
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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 | function setSortByFirstLinkFirstSpan(span, i){ |
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| 42 | var order = span.innerHTML; |
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| 43 | if(order.length === 1){ |
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| 44 | rq.colNo = i; |
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| 45 | rq.colOrd = order === instance.strDesc ? "desc" : "asc"; |
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| 46 | } |
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| 47 | return rq.colNo === i; |
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| 48 | }; |
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| 49 | function getFilter(){ |
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| 50 | var r = getFilterFieldsByTableID(crntTableId); |
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| 51 | if(r.filter !== null){ |
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| 52 | rq.filter = r.filter; |
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| 53 | } |
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| 54 | if(r.filterBy !== null){ |
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| 55 | rq.filterBy = r.filterBy; |
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| 56 | } |
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| 57 | }; |
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| 58 | |||
| 59 | //Build request object |
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| 60 | if(!checkSkip("sort")){ |
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| 61 | getSort(); |
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| 62 | } |
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| 63 | if(!checkSkip("filter")){ |
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| 64 | getFilter(); |
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| 65 | } |
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| 66 | |||
| 67 | rq.tableId = crntTableId; |
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| 68 | return rq; |
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| 69 | } |
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| 70 | function getFilterFieldsByTableID(tableID){ |
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| 71 | var fields = {filterBy: null, filter: null}; |
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| 72 | var filterDiv = getFilterDivByTableIDOrNull(tableID); |
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| 73 | if(filterDiv !== null){ |
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| 74 | setFilterFields(fields, filterDiv); |
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| 75 | } |
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| 76 | return fields; |
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| 77 | } |
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| 78 | function getFilterDivByTableIDOrNull(tableID){ |
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| 79 | var res = null; |
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| 80 | if(document.getElementById(tableID).parentNode.getElementsByTagName("div").length > 0){ |
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| 81 | for(var i = 0; i < document.getElementById(tableID).parentNode.getElementsByTagName("div").length; i++){ |
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| 82 | if(document.getElementById(tableID).parentNode.getElementsByTagName("div")[i].getAttribute("class") === "filter"){ |
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| 83 | return document.getElementById(tableID).parentNode.getElementsByTagName("div")[i]; |
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| 84 | } |
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| 85 | } |
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| 86 | |||
| 87 | } |
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| 88 | return res; |
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| 89 | } |
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| 90 | function setFilterFields(fields, filterDiv){ |
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| 91 | var slctObj = filterDiv.getElementsByTagName("select")[0]; |
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| 92 | if(slctObj && slctObj.options[slctObj.selectedIndex].value !== "all"){ |
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| 93 | fields.filterBy = slctObj.options[slctObj.selectedIndex].value; |
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| 94 | } |
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| 95 | var textObj = filterDiv.getElementsByTagName("input")[0]; |
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| 96 | if(textObj && textObj.value && textObj.value.length !== 0){ |
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| 97 | fields.filter = encodeURIComponent(textObj.value.trim()); |
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| 98 | } |
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| 99 | } |
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| 100 | function FilterGetTableId(field){ |
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| 101 | if(field.tagName.toLowerCase() !== "select"){ |
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| 102 | return field.getAttribute("data-table-id"); |
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| 103 | } |
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| 104 | var f = field.parentNode.parentNode.getElementsByTagName("input")[0]; |
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| 105 | return '' === f.value ? null : f.getAttribute("data-table-id"); |
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| 106 | } |
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| 107 | var tail = []; |
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| 108 | function LoadData(tableContainer, rq){ |
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| 109 | instance.setVisability(tableContainer, false); |
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| 110 | if(window.XMLHttpRequest){ |
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| 111 | var xmlhttp = new XMLHttpRequest();/* code for IE7+, Firefox, Chrome, Opera, Safari */ |
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| 112 | }else{ |
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| 113 | xmlhttp = new window.ActiveXObject("Microsoft.XMLHTTP");/*code for IE6, IE5 */ |
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| 114 | } |
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| 115 | for(var i = 0; i < tail.length; i++){ |
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| 116 | var ex_xmlhttp = tail.shift(); |
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| 117 | ex_xmlhttp.abort(); |
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| 118 | } |
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| 119 | xmlhttp.onreadystatechange = function(){ |
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| 120 | if(xmlhttp.readyState === 4 && xmlhttp.status === 200){ |
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| 121 | var d = JSON.parse(xmlhttp.responseText); |
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| 122 | table.DrawSection(tableContainer, d.body); |
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| 123 | table.DrawSection(tableContainer, d.footer, "tfoot"); |
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| 124 | table.LoadEndCalback(tableContainer); |
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| 125 | table.setVisability(tableContainer, true); |
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| 126 | if(typeof rq === "object"){ |
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| 127 | var hover = document.getElementById(rq.tableId) |
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| 128 | .getElementsByTagName("th")[rq.colNo].lang; |
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| 129 | if(hover){ |
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| 130 | table.ColumnHover(tableContainer, rq.colNo); |
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| 131 | } |
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| 132 | } |
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| 133 | } |
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| 134 | }; |
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| 135 | xmlhttp.open("GET", RequestToUrl(rq), true); |
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| 136 | xmlhttp.send(); |
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| 137 | tail.push(xmlhttp); //put at tail to can abort later any previous |
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| 138 | } |
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| 139 | function RequestToUrl(rq){ |
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| 140 | var url = location.pathname + ".json" + location.search; |
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| 141 | if(typeof rq === "object"){ |
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| 142 | var getUrlVarName = { |
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| 143 | colNo: "col", colOrd: "ord", filter: "filter", |
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| 144 | filterBy: "filter-by", pageNo: "pg", exportType: "export", |
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| 145 | tableId: "table-id" |
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| 146 | }; |
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| 147 | var flagFirst = location.search.length < 1 ? true : false; |
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| 148 | for(var r in rq){ |
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|
1 ignored issue
–
show
|
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| 149 | var clue = flagFirst === true ? "?" : "&"; |
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| 150 | url += clue + getUrlVarName[r] + "=" + rq[r]; |
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| 151 | flagFirst = false; |
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| 152 | } |
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| 153 | } |
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| 154 | return url; |
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| 155 | } |
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| 156 | function columnHoverRelease(rows, upto){ |
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| 157 | for(var i = 0; i < upto; i++){ |
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| 158 | for(var j = 0; j < rows[i].cells.length; j++){ |
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| 159 | if(rows[i].cells[j].lang){ |
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| 160 | rows[i].cells[j].removeAttribute("lang"); |
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| 161 | } |
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| 162 | } |
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| 163 | } |
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| 164 | } |
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| 165 | function clearSection(tSection){ |
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| 166 | if(iePrior(9)){ |
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| 167 | if(tSection.firstChild){ |
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| 168 | while(tSection.firstChild){ |
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| 169 | tSection.removeChild(tSection.firstChild); |
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| 170 | } |
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| 171 | } |
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| 172 | }else{ |
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| 173 | tSection.innerHTML = ""; |
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| 174 | } |
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| 175 | } |
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| 176 | function iePrior(v){ |
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| 177 | var rv = false; |
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| 178 | if(window.navigator.appName === 'Microsoft Internet Explorer'){ |
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| 179 | var ua = window.navigator.userAgent; |
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| 180 | var re = new RegExp("MSIE ([0-9]{1,}[\.0-9]{0,})"); |
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| 181 | if(re.exec(ua) !== null){ |
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| 182 | rv = parseFloat(RegExp.$1); |
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| 183 | } |
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| 184 | rv = rv < v ? true : false; |
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| 185 | } |
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| 186 | return rv; |
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| 187 | } |
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| 188 | function setPagingLinksSetActions(tContainer){ |
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| 189 | var pLinks = tContainer.querySelectorAll("tfoot .paging a"); |
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| 190 | if(pLinks.length > 0){ |
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| 191 | for(var j = 0; j < pLinks.length; j++){ |
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| 192 | pLinks[j].setAttribute("href", "javascript:void(0);"); |
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| 193 | pLinks[j].setAttribute("onclick", "return table.GoPage(this);"); |
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| 194 | } |
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| 195 | } |
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| 196 | } |
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| 197 | function footerProcessPaginationLinks(tSection){ |
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| 198 | var pLinks = tSection.querySelectorAll(".paging a"); |
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| 199 | if(pLinks.length > 0){ |
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| 200 | for(var j = 0; j < pLinks.length; j++){ |
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| 201 | pLinks[j].setAttribute("href", "javascript:void(0);"); |
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| 202 | pLinks[j].setAttribute("onclick", "return table.GoPage(this);"); |
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| 203 | } |
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| 204 | } |
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| 205 | } |
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| 206 | function SetTheTableColumnsHoverEffect(tableContainer){ |
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| 207 | if(iePrior(9)){ |
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| 208 | return; |
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| 209 | } |
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| 210 | var tContainer = document.getElementById(tableContainer); |
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| 211 | var tHcells = tContainer.rows[0].cells; |
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| 212 | for(var i = 0; i < tHcells.length; i++){ |
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| 213 | if(tHcells[i].firstChild.tagName === "A"){ |
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| 214 | tHcells[i].firstChild.setAttribute("onmouseover", "table.ColumnHover('" + tableContainer + "'," + i + ");"); |
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| 215 | tHcells[i].firstChild.setAttribute("onmouseout", "table.ColumnHover('" + tableContainer + "');"); |
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| 216 | } |
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| 217 | } |
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| 218 | setPagingLinksSetActions(tContainer); |
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| 219 | } |
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| 220 | |||
| 221 | return { |
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| 222 | rq: null, |
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| 223 | strAsc: String.fromCharCode(9650), //▲ |
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| 224 | strDesc: String.fromCharCode(9660),//▼ |
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| 225 | ReloadData: function(tableId){ |
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| 226 | var request = {}; |
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| 227 | BuildRequest(request, tableId); |
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| 228 | LoadData(tableId, request); |
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| 229 | }, |
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| 230 | Filter: function(field){ |
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| 231 | var crntTableId = FilterGetTableId(field); |
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| 232 | if(crntTableId !== null){ |
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| 233 | var request = {}; |
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| 234 | var exRq = this.rq; |
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| 235 | BuildRequest(request, crntTableId); |
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| 236 | if(exRq === null || |
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| 237 | request.filter !== exRq.filter || |
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| 238 | request.filterBy !== exRq.filterBy |
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| 239 | ){ |
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| 240 | LoadData(crntTableId, request); |
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| 241 | } |
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| 242 | } |
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| 243 | }, |
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| 244 | GoPage: function(lnk){ |
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| 245 | var request = {}; |
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| 246 | var table = getParent(lnk, "table"); |
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| 247 | var crntTableId = table.getAttribute("id"); |
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| 248 | BuildRequest(request, crntTableId); |
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| 249 | //check & serve pagination jump links |
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| 250 | var jumpDir = lnk.innerHTML.trim().substr(0, 1); |
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| 251 | if(jumpDir === "+" || jumpDir === "-"){ |
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| 252 | var current = table.querySelector("tfoot .paging .a").innerHTML; |
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| 253 | var jump = lnk.innerHTML.replace("K", "000").replace("M", "000000000"); |
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| 254 | var jumpPage = (parseInt(current) + parseInt(jump)); |
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| 255 | lnk.parentNode.setAttribute("data-page", jumpPage); |
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| 256 | lnk.style.transform = "none"; |
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| 257 | } |
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| 258 | request.pageNo = lnk.parentNode.hasAttribute("data-page") ? |
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| 259 | lnk.parentNode.getAttribute("data-page") : |
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| 260 | lnk.innerHTML; |
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| 261 | LoadData(crntTableId, request); |
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| 262 | return false; |
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| 263 | }, |
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| 264 | Export: function(lnk, eType){ |
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| 265 | var request = {}; |
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| 266 | var crntTableId = getParent(lnk, "table").getAttribute("id"); |
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| 267 | BuildRequest(request, crntTableId); |
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| 268 | request.exportType = ["CSV", "Excel"].indexOf(eType) >= 0 ? |
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| 269 | eType : |
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| 270 | "csv"; |
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| 271 | window.open(RequestToUrl(request)); |
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| 272 | return false; |
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| 273 | }, |
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| 274 | Sort: function(colNo, lnk){ |
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| 275 | var request = {}; |
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| 276 | var crntTableId = getParent(lnk, "table").getAttribute("id"); |
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| 277 | BuildRequest(request, crntTableId); |
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| 278 | if(Math.round(colNo) === request.colNo){ |
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| 279 | request.colOrd = (request.colOrd === "asc" ? "desc" : "asc"); |
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| 280 | }else{ |
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| 281 | request.colNo = Math.round(colNo); |
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| 282 | request.colOrd = "asc"; |
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| 283 | } |
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| 284 | LoadData(crntTableId, request); |
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| 285 | /* Clear and add new sort arrow */ |
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| 286 | var headSpans = getParent(lnk, "thead").getElementsByTagName("span"); |
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| 287 | var length = headSpans.length; |
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| 288 | for(var i = 0; i < length; i++){ |
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| 289 | headSpans[i].innerHTML = ""; |
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| 290 | } |
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| 291 | lnk.getElementsByTagName("span")[0].innerHTML = (request.colOrd === "desc" ? this.strDesc : this.strAsc); |
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| 292 | }, |
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| 293 | DrawSection: function(tableContainer, dt, tSection){ |
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| 294 | var section = tSection === "tfoot" ? "tfoot" : "tbody"; |
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| 295 | tSection = document.getElementById(tableContainer). |
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| 296 | getElementsByTagName(section)[0]; |
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| 297 | clearSection(tSection); |
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| 298 | for(var i = 0; i < dt.length; i++){ |
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| 299 | var row = dt[i]; |
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| 300 | var tRow = document.createElement("tr"); |
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| 301 | |||
| 302 | this.DrawRow(row, tRow); |
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| 303 | |||
| 304 | tSection.appendChild(tRow); |
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| 305 | if(section === "tfoot"){ |
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| 306 | footerProcessPaginationLinks(tSection); |
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| 307 | } |
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| 308 | this.AppendRowCalback(tableContainer); |
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| 309 | } |
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| 310 | }, |
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| 311 | DrawRow: function(row, tRow){ |
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| 312 | for(var cell in row){ |
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|
1 ignored issue
–
show
|
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| 313 | var tCell = document.createElement("td"); |
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| 314 | if(typeof row[cell] === "string" || typeof row[cell] === "number"){ |
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| 315 | tCell.innerHTML = row[cell]; |
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| 316 | }else if(typeof row[cell] === "object"){ |
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| 317 | this.DrawCellFromObject(row, cell, tCell); |
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| 318 | } |
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| 319 | tRow.appendChild(tCell); |
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| 320 | } |
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| 321 | }, |
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| 322 | DrawCellFromObject: function(row, cell, tCell){ |
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| 323 | for(var attr in row[cell]){ |
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|
1 ignored issue
–
show
|
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| 324 | if(typeof row[cell][attr] === "string"){ |
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| 325 | tCell.innerHTML = row[cell][attr]; |
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| 326 | }else if(typeof row[cell][attr] === "object"){ |
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| 327 | for(var v in row[cell][attr]){ |
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|
1 ignored issue
–
show
|
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| 328 | tCell.setAttribute(v, row[cell][attr][v]); |
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| 329 | } |
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| 330 | } |
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| 331 | } |
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| 332 | }, |
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| 333 | ColumnHover: function(tableContainer, index){ |
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| 334 | if(!iePrior(9)){ |
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| 335 | var rows = document.getElementById(tableContainer).rows; |
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| 336 | var upto = rows.length - 1; |
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| 337 | if(typeof index === "undefined"){ |
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| 338 | columnHoverRelease(rows, upto); |
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| 339 | } else { |
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| 340 | for(var i = 0; i < upto; i++){ |
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| 341 | rows[i].cells[index].setAttribute("lang", "col-hover"); |
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| 342 | } |
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| 343 | } |
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| 344 | } |
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| 345 | }, |
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| 346 | setVisability: function(tableContainer, rq){ |
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| 347 | var tbl = document.getElementById(tableContainer); |
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| 348 | if(rq === true){ |
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| 349 | tbl.style.filter = "none"; |
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| 350 | tbl.style.opacity = "1"; |
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| 351 | tbl.style.cursor = "auto"; |
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| 352 | }else if(rq === false){ |
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| 353 | tbl.style.filter = "blur(1px)"; |
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| 354 | tbl.style.opacity = "0.8"; |
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| 355 | tbl.style.cursor = "wait"; |
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| 356 | }else{ |
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| 357 | console.error("table error in the rq value"); |
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| 358 | } |
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| 359 | }, |
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| 360 | init: function(tableId){ |
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| 361 | SetTheTableColumnsHoverEffect(tableId); |
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| 362 | }, |
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| 363 | LoadEndCalback: function(){},/*Allows override: function(tableId){if(tableId){...}}*/ |
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| 364 | AppendRowCalback: function(){}/*Allows override: function(tableId){if(tableId){...}}*/ |
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| 365 | }; |
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| 366 | } |
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| 367 | return { |
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| 368 | //Get the Singleton instance if one exists, or create one if it doesn't |
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| 369 | getInstance: function(){ |
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| 370 | if(!instance){ |
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| 371 | instance = initInstance(); |
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| 372 | } |
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| 373 | return instance; |
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| 374 | } |
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| 375 | }; |
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| 376 | })(); |
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| 377 | var table = TableSingleton.getInstance(); |
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| 378 |
Loading history...
When iterating over the keys of an object, this includes not only the keys of the object, but also keys contained in the prototype of that object. It is generally a best practice to check for these keys specifically: