[#4] Started implementing needed traits (#4)

src/ivago/controller/pickup_times.rs

@@ -1,5 +1,7 @@
 use super::search::Street;
 use chrono::NaiveDate;
+use rocket::http::RawStr;
+use rocket::request::FromFormValue;
 use std::error::Error;
 
 const BASE_URL: &str = "https://www.ivago.be/nl/particulier/afval/ophaling";
@@ -13,6 +15,17 @@ pub struct PickupTime {
     url: String,
 }
 
+impl<'v> FromFormValue<'v> for NaiveDate {
+    type Error = &'v RawStr;
+
+    fn from_form_value(form_value: &'v RawStr) -> Result<NaiveDate, &'v RawStr> {
+        match NaiveDate::parse_from_str(form_value, "%Y-%m-%d") {
+            Ok(date) => Ok(date),
+            Err(_) => Err(form_value),
+        }
+    }
+}
+
 pub fn get_pickup_times(
     street: Street,
     number: u64,