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index.js
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index.js
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const jpath = require("jsonpath")
function _render(template, data, symbol) {
let parsedTemplate = JSON.parse(template);
const keysDataObject = Object.keys(data);
for(key in keysDataObject)
{
if(checkConditionalStatement(parsedTemplate, data, key)){
if(!data[Object.keys(data)[key]]){
delete parsedTemplate['{{?' + Object.keys(data)[key] + '}}' ];
}else{
var paths = jpath.paths(parsedTemplate, "$..[\"{{?" + Object.keys(data)[key] + "}}\"]");
paths.forEach(path => {
path = path.slice(0,path.length -1);
setValue(parsedTemplate,path,jpath.value(parsedTemplate, "$..[\"{{?" + Object.keys(data)[key] + "}}\"]"), Object.keys(data)[key]);
});
}
template = JSON.stringify(parsedTemplate);
}
if(checkIterativeStatement(parsedTemplate, data, key)){
const paths = jpath.paths(parsedTemplate, "$..[\"{{.." + Object.keys(data)[key] + "}}\"]");
if(checkDataArrayIsEmpty(data)){
removeIterativeStatementFromTemplate(parsedTemplate, paths, "$..[\"{{.." + Object.keys(data)[key] + "}}\"]");
}else{
expandIterationAndReplaceValue(paths, data, parsedTemplate);
removeIterativeStatementFromTemplate(parsedTemplate, paths, "{{.." + Object.keys(data)[key] + "}}");
}
template = JSON.stringify(parsedTemplate);
}
if(checkIterativeObjStatement(parsedTemplate, data, key)){
const paths = jpath.paths(parsedTemplate, "$..[\"{{__" + Object.keys(data)[key] + "}}\"]");
if(checkDataArrayIsEmpty(data)){
removeIterativeStatementFromTemplate(parsedTemplate, paths, "$..[\"{{__" + Object.keys(data)[key] + "}}\"]");
}else{
expandIterationObjAndReplaceValue(paths, data, parsedTemplate);
removeIterativeStatementFromTemplate(parsedTemplate, paths, "{{__" + Object.keys(data)[key] + "}}");
}
template = JSON.stringify(parsedTemplate);
}
({ template, parsedTemplate } = replaceValue(data, template, parsedTemplate));
}
return JSON.parse(template);
}
function expandIterationAndReplaceValue(paths, data, parsedTemplate) {
paths.forEach(path => {
path = path.slice(0, path.length - 1);
path.push(Object.keys(data)[key]);
const dataArray = data[Object.keys(data)[key]];
let count = 0;
for (const el in dataArray) {
const dataArrayObjectKeys = Object.keys(data[Object.keys(data)[key]][el]);
setValueArray(parsedTemplate, path, jpath.value(parsedTemplate, "$..[\"{{.." + Object.keys(data)[key] + "}}\"]"), Object.keys(data)[key], dataArray[el]);
}
});
}
function expandIterationObjAndReplaceValue(paths, data, parsedTemplate) {
paths.forEach(path => {
path = path.slice(0, path.length - 1);
path.push(Object.keys(data)[key]);
const dataArray = data[Object.keys(data)[key]];
let count = 0;
for (const el in dataArray) {
const dataArrayObjectKeys = Object.keys(data[Object.keys(data)[key]][el]);
path.push(el);
setValueObject(parsedTemplate, path, jpath.value(parsedTemplate, "$..[\"{{__" + Object.keys(data)[key] + "}}\"]"), Object.keys(data)[key], dataArray[el]);
path = path.slice(0, path.length - 1);
}
});
}
function removeIterativeStatementFromTemplate(parsedTemplate, paths, key) {
paths.forEach(path => {
let obj = parsedTemplate;
for (let i = 1; i < path.length - 1; i++) {
if(obj[path[i]]){
obj = obj[path[i]];
}
}
delete obj[key];
});
}
function checkDataArrayIsEmpty(data) {
return data[Object.keys(data)[key]].length == 0;
}
function replaceValue(data, template, parsedTemplate) {
if (typeof (data[Object.keys(data)[key]]) === "number") {
template = (template).replace(new RegExp("\"\{\{" + Object.keys(data)[key] + "+\}\}\"+", "g"), data[Object.keys(data)[key]]);
parsedTemplate = JSON.parse(template);
}
else {
template = (template).replace(new RegExp("\{\{" + Object.keys(data)[key] + "+\}\}+", "g"), data[Object.keys(data)[key]]);
parsedTemplate = JSON.parse(template);
}
return { template, parsedTemplate };
}
function checkIterativeStatement(parsedTemplate, data) {
return jpath.paths(parsedTemplate, "$..[\"{{.." + Object.keys(data)[key] + "}}\"]").length > 0;
}
function checkIterativeObjStatement(parsedTemplate, data) {
return jpath.paths(parsedTemplate, "$..[\"{{__" + Object.keys(data)[key] + "}}\"]").length > 0;
}
function checkConditionalStatement(parsedTemplate, data, key) {
return jpath.paths(parsedTemplate, "$..[\"{{?" + Object.keys(data)[key] + "}}\"]").length > 0;
}
function isNumber(n) { return /^-?[\d.]+(?:e-?\d+)?$/.test(n); }
function setValue(obj, path, obj2, todel) {
var i;
for (i = 1; i < path.length; i++) {
obj = obj[path[i]];
}
Object.keys(obj2).forEach(element => {
obj[element] = obj2[element];
});
delete obj['{{?' + todel + '}}'];
}
function setValueArray(obj, path, obj2, todel, newValue, isDel = false) {
var i;
for (i = 1; i < path.length; i++) {
if(obj[path[i]]){
obj = obj[path[i]];
}else {
obj[path[i]] = [];
obj = obj[path[i]];
}
}
for (const k in Object.keys(obj2)) {
const currentKey = Object.keys(obj2)[k];
const currentValue = newValue[currentKey.replace('{{','').replace('}}','')];
if(typeof (currentValue) === "number"){
obj2 = JSON.parse((JSON.stringify(obj2)).replace(new RegExp(Object.keys(obj2)[k].indexOf("{") > -1 ? Object.keys(obj2)[k] : "\"\{\{" + Object.keys(obj2)[k] + "+\}\}\"+","g"), currentValue));
}else{
obj2 = JSON.parse((JSON.stringify(obj2)).replace(new RegExp(Object.keys(obj2)[k].indexOf("{") > -1 ? Object.keys(obj2)[k] : "\{\{" + Object.keys(obj2)[k] + "+\}\}+","g"), currentValue));
}
}
obj.push(obj2);
}
function setValueObject(obj, path, obj2, todel, newValue, isDel = false) {
var i;
for (i = 1; i < path.length; i++) {
if(obj[path[i]]){
obj = obj[path[i]];
}else {
obj[path[i]] = [];
obj = obj[path[i]];
}
}
for (const k in Object.keys(obj2)) {
const currentKey = Object.keys(obj2)[k];
const currentValue = newValue[currentKey.replace('{{','').replace('}}','')];
if(typeof (currentValue) === "number"){
obj2 = JSON.parse((JSON.stringify(obj2)).replace(new RegExp(Object.keys(obj2)[k].indexOf("{") > -1 ? Object.keys(obj2)[k] : "\"\{\{" + Object.keys(obj2)[k] + "+\}\}\"+","g"), currentValue));
}else{
obj2 = JSON.parse((JSON.stringify(obj2)).replace(new RegExp(Object.keys(obj2)[k].indexOf("{") > -1 ? Object.keys(obj2)[k] : "\{\{" + Object.keys(obj2)[k] + "+\}\}+","g"), currentValue));
}
obj[currentKey] = obj2[currentKey];
}
}
function setValueObject(obj, path, obj2, todel, newValue, isDel = false) {
var i;
for (i = 1; i < path.length; i++) {
if(obj[path[i]]){
obj = obj[path[i]];
}else {
obj[path[i]] = {};
obj = obj[path[i]];
}
}
for (const k in Object.keys(obj2)) {
const currentKey = Object.keys(obj2)[k];
if(currentKey != path[path.length-1]) {
continue;
}
let subObj = obj2[Object.keys(obj2)[k]];
for (const subkey in Object.keys(subObj)) {
const currentSubKey = Object.keys(subObj)[subkey];
const currentSubValue = newValue[currentSubKey.replace('{{','').replace('}}','')];
if(typeof (currentSubValue) === "number"){
obj[currentSubKey] = JSON.parse((JSON.stringify(subObj[currentSubKey])).replace(new RegExp(currentSubKey.indexOf("{") > -1 ? currentSubKey : "\"\{\{" + currentSubKey + "+\}\}\"+","g"), currentSubValue));
}else{
obj[currentSubKey] = JSON.parse((JSON.stringify(subObj[currentSubKey])).replace(new RegExp(currentSubKey.indexOf("{") > -1 ? currentSubKey : "\{\{" + currentSubKey + "+\}\}+","g"), currentSubValue));
}
}
}
}
exports.render = function(template, data) {
if(JSON.stringify(template).indexOf('{{') == -1 ) {
return template;
}else{
return JSON.parse(JSON.stringify(_render(JSON.stringify(template), data)));
}
}