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date.ts
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date.ts
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import { Field, Context, Errors } from "../../../main";
import humanComparatorToQuery, {
ComparatorObject,
HumanComparator,
DBComparator,
} from "../../../utils/human-comparator-to-query";
const DAY = 1000 * 60 * 60 * 24;
function dateStrToDayInt(date_str: string) {
return Date.parse(date_str) / DAY;
}
/** Stores a date - without hours/minutes, just the day.
*
* **Params**: None
*/
export default class DateField extends Field {
typeName = "date";
async isProperValue(_: Context, value: string) {
const date_in_string = value.toString();
const regex = /^([0-9]{4})-(0?[1-9]|1[0-2])-([0-2]?[0-9]|30|31)$/; // granulation_per_day
if (
regex.test(date_in_string) === false ||
isNaN(Date.parse(date_in_string))
) {
return Field.invalid(
`Value "${value}" is not date calendar format. Expected value in standard IS0 8601 (YYYY-MM-DD) format`
);
}
return Field.valid();
}
async encode(_: Context, value_in_code: string) {
const date_str = value_in_code.toString();
// value is already confirmed to be properly formatted
return dateStrToDayInt(date_str);
}
async filterToQuery(
_: Context,
field_filter: string | ComparatorObject<string>
) {
if (typeof field_filter !== "object") {
return {
$eq: dateStrToDayInt(field_filter),
};
}
// treating filter as a query here
const new_filter: { [comparator in DBComparator]?: number } = {};
for (const comparator in field_filter as ComparatorObject<string>) {
const new_comparator = humanComparatorToQuery(
comparator as HumanComparator
);
if (new_comparator === undefined) {
throw new Errors.ValidationError(
`Unknown comparator: '${comparator}'.`
);
}
new_filter[new_comparator] = dateStrToDayInt(
field_filter[comparator as HumanComparator]
);
}
return new_filter;
}
async decode(
_: Context,
value_in_db: number,
old_value: string,
format: never
) {
const d = new Date(value_in_db * DAY);
const month = d.getMonth() + 1;
let month_str = month.toString();
if (month < 10) {
month_str = "0" + month_str;
}
return `${d.getFullYear()}-${month_str}-${
d.getDate() < 10 ? "0" : ""
}${d.getDate()}`;
}
}

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