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148 | import { environment } from "./environment/environment.ts";
import {
Country,
Region,
Currencies,
Languages,
} from "./models/country.model.ts";
import { Cache } from "./util/cache.ts";
import { Logger } from "./util/logger.ts";
export class Countries {
list: Country[] = [];
names: string[] = [];
query = environment.queries;
constructor(private cache: Cache, private logger: Logger) {}
public async sync(config?: { force: boolean }): Promise<Country[]> {
if (this.shouldSync() || config?.force) {
this.logger.alert(
"Synchronizing countries database...",
config?.force
? ""
: `\nThis will only happen every ${environment.syncInterval} days`
);
// Fetch and parse countries data from API
const response = await fetch(environment.baseUrl + this.query);
const countries = (await response.json()) as Country[];
this.list = countries;
this.cache.saveJson("countries", countries);
this.cache.saveTxt("last-synced", JSON.stringify(Date.now()));
this.logger.success(
`Synced successfully: cache saved at ${environment.cacheDir}`
);
} else {
this.list = this.cache.readJson("countries") as Country[];
}
this.names = this.list.map((c) => c.name.common);
return this.list;
}
getAll() {
return this.list;
}
public find(name: string) {
name = name.toLowerCase();
// Find exact match first
let country = this.list.find((c) => {
const countryName = c.name.common.toLowerCase();
return countryName === name;
});
// Find fuzzy match if exact was not found
if (!country) {
country = this.list.find((c) => {
const countryName = c.name.common.toLowerCase();
return countryName.includes(name);
});
}
if (!country) {
throw `Cannot find country named ${name}`;
}
return country;
}
public findByCapital(capital: string) {
const country = this.list.find((c) => {
const capitalsLowercase = c.capital.map((capital) =>
capital.toLowerCase()
);
return capitalsLowercase.includes(capital);
});
if (!country) {
throw `Could not find the country of capital: ${capital}`;
}
return country;
}
capitalOf(capital: string) {
const country = this.findByCapital(capital);
this.logger.capitalOf(capital, country.name.common);
}
public filterByRegion(region: Region) {
return this.list.filter((country) => country.region === region);
}
public print(name: string) {
const country = this.find(name);
const currencies = this.extractCurrencies(country.currencies);
const languages = this.extractLanguages(country.languages);
this.logger.logCountry({
country: country.name.common,
latlng: country.latlng.join("/"),
capital: country.capital[0],
flag: country.flag,
population: country.population.toLocaleString(),
region: country.region,
subregion: country.subregion,
capitalLatLng: country.capitalInfo.latlng.join("/"),
timezones: country.timezones.join("\n\t\t\t "),
tld: country.tld.join(" | "),
currencies,
languages,
});
}
public random(): string {
const randomNum = Math.floor(Math.random() * this.names.length);
return this.names[randomNum];
}
private shouldSync() {
const lastSynced = this.cache.readTxt("last-synced");
const cacheExists = this.cache.exists("countries", ".json");
const week = environment.syncInterval * 23 * 60 * 60 * 1000;
const updateDue = Date.now() - Number(lastSynced) > week;
return !cacheExists || !lastSynced || updateDue;
}
private extractCurrencies(currencies: Currencies) {
const result = [];
for (const currencyAbbr in currencies) {
const currency = currencies[currencyAbbr];
result.push(`${currency.name} [${currency.symbol}](${currencyAbbr})`);
}
return result.join("\n\t\t\t ");
}
private extractLanguages(languages: Languages) {
const result = [];
for (const langAbbr in languages) {
result.push(languages[langAbbr]);
}
return result.join(" | ");
}
}
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