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KmConnector.js
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KmConnector.js
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class KmConnector {
constructor() {
this.data = require("./data/dataQueryCache.json");
this.dataEU = require("./data/dataEU.json");
this.cities = require("./data/citiesQueryCache.json");
this.countryProperties = require("./data/countryPropertiesQueryCache.json");
this.cityProperties = require("./data/cityPropertiesQueryCache.json");
}
query(country, property) {
if (country == 'eu') {
return this.dataEU[property];
}
if (this.cities[country] !== undefined) {
if (property == 'capital') property = 'country';
this.cityAnswer = true;
return this.cities[country][property];
}
return this.data[country][property];
}
filterNum(property, operator, value) {
// check weather the property is an integer value
if (this.countryProperties[property].dataType = 'int') {
value = parseInt(value);
}
else {
// this is not an int - only equal operator is possilbe
operator = null;
}
// this is an integer
let countries = [];
let countriesString = "";
switch (operator) {
case 'more':
console.log('more');
for (let i in this.data) {
let item = this.data[i];
if (item[property] > value) {
countries.push(item);
}
}
break;
case 'less':
console.log('less');
for (let i in this.data) {
let item = this.data[i];
if (item[property] < value) {
countries.push(item);
}
}
break;
default:
console.log('default');
for (let i in this.data) {
let item = this.data[i];
console.log(property, item[property].toLowerCase(), value)
if (item[property].toLowerCase() == value) {
countries.push(item);
}
}
}
// build return object
for (let i in countries) {
countriesString += countries[i].name;
if (i < countries.length - 1) countriesString += ", ";
}
return {
num: countries.length,
items: countries,
string: countriesString
};
}
filter(property, value) {
let countries = [];
let countriesString = "";
for (let i in this.data) {
let item = this.data[i];
if (item[property].toLowerCase() == value) {
countries.push(item);
}
}
// build return object
for (let i in countries) {
countriesString += countries[i].name;
if (i < countries.length - 1) countriesString += ", ";
}
return {
num: countries.length,
items: countries,
string: countriesString
};
}
aggregateFunction(property, operator, value) {
// check weather the property is an integer value
if (this.countryProperties[property].dataType = 'int') {
value = parseInt(value);
}
else {
// this is not an int - only equal operator is possilbe
operator = 'count';
}
switch (operator) {
case "avg":
break;
case 'max':
break;
case 'min':
break;
case 'med':
break;
case 'sum':
break;
default: // count
}
return null;
}
getAnswerText(property) {
console.log('try to get an answer');
if (this.cityAnswer && (property == 'capital' || property == 'country')) {
return this.cityProperties['country'].defaultAnswer;
}
return this.countryProperties[property].defaultAnswer;
}
}
module.exports.KmConnector = KmConnector;