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import { Observable, of } from "rxjs";
import { concatAll, count, filter, groupBy, map, mergeMap, reduce, tap } from 'rxjs/operators';
import { ExerciseModuleFunc } from "../types";
interface Passport {
byr: string;
iyr: string;
eyr: string;
hgt: string;
hcl: string;
ecl: string;
pid: string;
cid?: string;
}
const parsePassports = (input: string): Passport[] => {
const sections = input.split("\n\n")
const splitted = sections.map(s => s.split(/[\n\r\s]+/g));
const result = splitted.map(s => s.reduce((acc, val) => {
const [lhs, rhs] = val.split(":");
acc[lhs] = rhs;
return acc;
}, {})) as Passport[];
return result;
}
const isPassportValid = (passport: Passport): boolean => {
const requiredKeys = ["byr", "iyr", "eyr", "hgt", "hcl", "ecl", "pid"];
let valid = true;
requiredKeys.forEach(key => {
if (passport[key] === undefined) {
valid = false;
}
});
return valid;
}
const day4: ExerciseModuleFunc = async (input: string) => {
const prom1 = of(input).pipe(
map(parsePassports),
concatAll(),
filter(isPassportValid),
count()
).toPromise();
return Promise.all([prom1]);
}
export default day4;
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