77 lines
2.3 KiB
Rust
77 lines
2.3 KiB
Rust
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use chrono::{FixedOffset, TimeZone};
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use regex::Regex;
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use rocket::http::RawStr;
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use rocket::request::FromFormValue;
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use serde::ser::Serializer;
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use serde::Serialize;
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use std::convert::TryFrom;
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/// Represents a very simple Timezoneless date. Considering the timezone will
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/// always be CEST (aka Belgium's timezone), this is good enough. I use this
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/// instead of a NaiveDate to avoid E0117.
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pub struct BasicDate {
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year: u32,
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month: u8,
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day: u8,
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}
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/// This allows us to use BasicDate as a query parameter in our routes.
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impl<'v> FromFormValue<'v> for BasicDate {
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type Error = &'v RawStr;
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fn from_form_value(form_value: &'v RawStr) -> Result<BasicDate, Self::Error> {
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match BasicDate::try_from(form_value.as_str()) {
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Err(_) => Err(form_value),
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Ok(date) => Ok(date),
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}
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}
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}
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/// We need this when deserializing BasicDate.
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impl ToString for BasicDate {
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fn to_string(&self) -> String {
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format!("{}-{}-{}", self.year, self.month, self.day)
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}
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}
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/// This is used to serialize BasicDate.
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impl TryFrom<&str> for BasicDate {
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type Error = ();
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fn try_from(s: &str) -> Result<BasicDate, Self::Error> {
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let re = Regex::new(r"^(\d{4})-(\d{2})-(\d{2})$").unwrap();
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match re.captures(s) {
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None => Err(()),
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Some(caps) => Ok(BasicDate {
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// TODO change this to ? operator if possible
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year: caps.get(1).unwrap().as_str().parse().unwrap(),
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month: caps.get(2).unwrap().as_str().parse().unwrap(),
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day: caps.get(3).unwrap().as_str().parse().unwrap(),
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}),
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}
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}
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}
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impl Serialize for BasicDate {
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fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
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where
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S: Serializer,
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{
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serializer.serialize_str(&self.to_string())
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}
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}
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impl From<BasicDate> for i64 {
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fn from(date: BasicDate) -> i64 {
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// Timezone of Brussels is UTC + 2 hours in the western hemisphere
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FixedOffset::west(7_200)
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.ymd(date.year as i32, date.month as u32, date.day as u32)
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// For some reason, I couldn't get .timestamp() to work on a Date
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// without a time component, even though the docs seemed to
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// indicate this was possible
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.and_hms(0, 0, 0)
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.timestamp()
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}
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}
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