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use std::ffi::{c_void, CStr, CString};
use std::ptr;
use chrono::DateTime;
use chrono::Datelike;
use chrono::TimeDelta;
use chrono::Utc;
use std::fmt::Debug;
use std::hash::Hash;
use std::ops::{BitAnd, BitOr};
use crate::collections::base::{Collection, Span, SpanSet, impl_collection, impl_iterator};
use crate::errors::ParseError;
use crate::utils::to_meos_timestamp;
use super::tstz_span::TsTzSpan;
use crate::utils::create_interval;
pub struct TsTzSpanSet {
_inner: ptr::NonNull<meos_sys::SpanSet>,
}
impl Drop for TsTzSpanSet {
fn drop(&mut self) {
unsafe {
libc::free(self._inner.as_ptr().cast::<c_void>());
}
}
}
impl Collection for TsTzSpanSet {
impl_collection!(spanset, DateTime<Utc>);
fn contains(&self, content: &DateTime<Utc>) -> bool {
unsafe { meos_sys::contains_spanset_date(self.inner(), content.num_days_from_ce()) }
}
}
impl SpanSet for TsTzSpanSet {
type SpanType = TsTzSpan;
type SubsetType = TimeDelta;
fn inner(&self) -> *const meos_sys::SpanSet {
self._inner.as_ptr()
}
fn from_inner(inner: *mut meos_sys::SpanSet) -> Self {
Self {
_inner: ptr::NonNull::new(inner).expect("Null pointers not allowed"),
}
}
fn width(&self, _ignore_gaps: bool) -> Self::Type {
unimplemented!("Not implemented for date")
}
/// Return a new `TsTzSpanSet` with the lower and upper bounds shifted by `delta`.
///
/// ## Arguments
/// * `delta` - The value to shift by.
///
/// ## Returns
/// A new `TsTzSpanSet` instance.
///
/// ## Example
/// ```
/// # use meos::TsTzSpanSet;
/// # use meos::meos_initialize;
/// # use std::str::FromStr;
/// # use meos::SpanSet;
/// use chrono::TimeDelta;
/// # meos_initialize();
/// let span_set = TsTzSpanSet::from_str("{[2019-09-08 00:00:00+00, 2019-09-10 00:00:00+00], [2019-09-16 00:00:00+00, 2019-09-20 00:00:00+00]}").unwrap();
/// let shifted_span_set = span_set.shift(TimeDelta::days(5));
///
/// let expected_shifted_span_set =
/// TsTzSpanSet::from_str("{[2019-09-18 00:00:00+00, 2019-09-20 00:00:00+00], [2019-09-26 00:00:00+00, 2019-09-30 00:00:00+00]}").unwrap();
/// assert_eq!(shifted_span_set, expected_shifted_span_set);
/// ```
fn shift(&self, delta: TimeDelta) -> TsTzSpanSet {
self.shift_scale(Some(delta), None)
}
/// Return a new `TsTzSpanSet` with the lower and upper bounds scaled so that the width is `width`.
///
/// ## Arguments
/// * `width` - The new width.
///
/// ## Returns
/// A new `TsTzSpanSet` instance.
///
/// ## Example
/// ```
/// # use meos::TsTzSpanSet;
/// # use meos::meos_initialize;
/// # use std::str::FromStr;
/// # use meos::SpanSet;
/// use chrono::TimeDelta;
/// # meos_initialize();
/// let span_set = TsTzSpanSet::from_str("{[2019-09-08 00:00:00+00, 2019-09-10 00:00:00+00], [2019-09-13 00:00:00+00, 2019-09-15 00:00:00+00]}").unwrap();
/// let scaled_span_set = span_set.scale(TimeDelta::days(5));
///
/// let expected_scaled_span_set =
/// TsTzSpanSet::from_str("{[2019-09-08 00:00:00+00, 2019-09-10 20:34:17.142857+00], [2019-09-15 03:25:42.857142+00, 2019-09-18 00:00:00+00]}").unwrap();
/// assert_eq!(scaled_span_set, expected_scaled_span_set);
/// ```
fn scale(&self, width: TimeDelta) -> TsTzSpanSet {
self.shift_scale(None, Some(width))
}
/// Return a new `TsTzSpanSet` with the lower and upper bounds shifted by `delta` and scaled so that the width is `width`.
///
/// ## Arguments
/// * `delta` - The value to shift by.
/// * `width` - The new width.
///
/// ## Returns
/// A new `TsTzSpanSet` instance.
///
/// ## Example
/// ```
/// # use meos::TsTzSpanSet;
/// # use meos::meos_initialize;
/// # use std::str::FromStr;
/// # use meos::SpanSet;
/// use chrono::TimeDelta;
/// # meos_initialize();
/// let span_set = TsTzSpanSet::from_str("{[2019-09-08 00:00:00+00, 2019-09-10 00:00:00+00], [2019-09-11 00:00:00+00, 2019-09-12 00:00:00+00]}").unwrap();
/// let shifted_scaled_span_set = span_set.shift_scale(Some(TimeDelta::days(5)), Some(TimeDelta::days(10)));
///
/// let expected_shifted_scaled_span_set =
/// TsTzSpanSet::from_str("{[2019-09-18 00:00:00+00, 2019-09-28 00:00:00+00], [2019-10-03 00:00:00+00, 2019-10-08 00:00:00+00]}").unwrap();
/// assert_eq!(shifted_scaled_span_set, expected_shifted_scaled_span_set);
/// ```
fn shift_scale(&self, delta: Option<TimeDelta>, width: Option<TimeDelta>) -> TsTzSpanSet {
let d = {
if let Some(d) = delta {
&raw const *Box::new(create_interval(d))
} else {
std::ptr::null()
}
};
let w = {
if let Some(w) = width {
&raw const *Box::new(create_interval(w))
} else {
std::ptr::null()
}
};
let modified = unsafe { meos_sys::tstzspanset_shift_scale(self.inner(), d, w) };
TsTzSpanSet::from_inner(modified)
}
/// Calculates the distance between this `TsTzSpanSet` and a specific timestamp (`value`).
///
/// ## Arguments
/// * `value` - A timestamp represented by `TimeDelta` from the Unix epoch.
///
/// ## Returns
/// A `TimeDelta` representing the distance in seconds between this `TsTzSpanSet` and the given timestamp.
///
/// ## Example
/// ```
/// # use meos::TsTzSpanSet;
/// # use meos::SpanSet;
/// # use chrono::{TimeDelta, TimeZone, Utc};
/// # use meos::meos_initialize;
/// use std::str::FromStr;
/// # meos_initialize();
/// let span_set = TsTzSpanSet::from_str("{[2019-09-08 00:00:00+00, 2019-09-10 00:00:00+00], [2019-09-11 00:00:00+00, 2019-09-12 00:00:00+00]}").unwrap();
/// let timestamp = Utc.with_ymd_and_hms(2019, 9, 5, 0, 0, 0).unwrap();
/// let distance = span_set.distance_to_value(×tamp);
/// assert_eq!(distance, TimeDelta::days(3));
/// ```
fn distance_to_value(&self, value: &DateTime<Utc>) -> TimeDelta {
unsafe {
TimeDelta::seconds(
meos_sys::distance_spanset_timestamptz(self.inner(), to_meos_timestamp(value))
as i64, // It returns the number of seconds: https://github.com/MobilityDB/MobilityDB/blob/6b60876817b53bc33967f7df50ab8e1f482b0133/meos/src/general/span_ops.c#L2292
)
}
}
/// Calculates the distance between this `TsTzSpanSet` and another `TsTzSpanSet`.
///
/// ## Arguments
/// * `other` - Another `TsTzSpanSet` to calculate the distance to.
///
/// ## Returns
/// A `TimeDelta` representing the distance in seconds between the two span sets.
///
/// ## Example
/// ```
/// # use meos::TsTzSpanSet;
/// # use crate::meos::SpanSet;
/// # use chrono::{TimeDelta, TimeZone, Utc};
/// # use meos::meos_initialize;
/// use std::str::FromStr;
/// # meos_initialize();
/// let span_set1 = TsTzSpanSet::from_str("{[2019-09-08 00:00:00+00, 2019-09-10 00:00:00+00], [2019-09-11 00:00:00+00, 2019-09-12 00:00:00+00]}").unwrap();
/// let span_set2 = TsTzSpanSet::from_str("{[2018-08-07 00:00:00+00, 2018-08-17 00:00:00+00], [2018-10-17 00:00:00+00, 2018-10-20 00:00:00+00]}").unwrap();
/// let distance = span_set1.distance_to_span_set(&span_set2);
/// assert_eq!(distance, TimeDelta::days(323));
/// ```
fn distance_to_span_set(&self, other: &Self) -> TimeDelta {
unsafe {
TimeDelta::seconds(meos_sys::distance_tstzspanset_tstzspanset(
self.inner(),
other.inner(),
) as i64)
}
}
/// Calculates the distance between this `TsTzSpanSet` and a `TsTzSpan`.
///
/// ## Arguments
/// * `other` - A `TsTzSpan` to calculate the distance to.
///
/// ## Returns
/// A `TimeDelta` representing the distance in seconds between the span set and the span.
///
/// ## Example
/// ```
/// # use meos::TsTzSpanSet;
/// # use meos::SpanSet;
/// # use meos::TsTzSpan;
/// # use meos::Span;
/// # use chrono::{TimeDelta, TimeZone, Utc};
/// # use meos::meos_initialize;
/// use std::str::FromStr;
/// # meos_initialize();
/// let span_set = TsTzSpanSet::from_str("{[2019-09-08 00:00:00+00, 2019-09-10 00:00:00+00], [2019-09-11 00:00:00+00, 2019-09-12 00:00:00+00]}").unwrap();
/// let span = TsTzSpan::from_str("[2018-08-07 00:00:00+00, 2018-08-17 00:00:00+00]").unwrap();
/// let distance = span_set.distance_to_span(&span);
/// assert_eq!(distance, TimeDelta::days(387));
/// ```
fn distance_to_span(&self, span: &Self::SpanType) -> Self::SubsetType {
unsafe {
TimeDelta::seconds(
meos_sys::distance_tstzspanset_tstzspan(self.inner(), span.inner()) as i64,
)
}
}
}
impl Clone for TsTzSpanSet {
fn clone(&self) -> TsTzSpanSet {
self.copy()
}
}
impl_iterator!(TsTzSpanSet);
impl Hash for TsTzSpanSet {
fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
let hash = unsafe { meos_sys::spanset_hash(self.inner()) };
state.write_u32(hash);
let _ = state.finish();
}
}
impl std::str::FromStr for TsTzSpanSet {
type Err = ParseError;
fn from_str(string: &str) -> Result<Self, Self::Err> {
CString::new(string).map_err(|_| ParseError).map(|string| {
let inner = unsafe { meos_sys::tstzspanset_in(string.as_ptr()) };
Self::from_inner(inner)
})
}
}
impl std::cmp::PartialEq for TsTzSpanSet {
fn eq(&self, other: &Self) -> bool {
unsafe { meos_sys::spanset_eq(self.inner(), other.inner()) }
}
}
impl Debug for TsTzSpanSet {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
let out_str = unsafe { meos_sys::tstzspanset_out(self.inner()) };
let c_str = unsafe { CStr::from_ptr(out_str) };
let str = c_str.to_str().map_err(|_| std::fmt::Error)?;
let result = f.write_str(str);
unsafe { libc::free(out_str.cast::<c_void>()) };
result
}
}
impl BitAnd<TsTzSpanSet> for TsTzSpanSet {
type Output = Option<TsTzSpanSet>;
/// Computes the dateersection of two `TsTzSpanSet`s.
///
/// ## Arguments
///
/// * `other` - Another `TsTzSpanSet` to dateersect with.
///
/// ## Returns
///
/// * `Some(TsTzSpanSet)` - A new `TsTzSpanSet` containing the dateersection, if it exists.
/// * `None` - If the dateersection is empty.
///
/// ## Example
///
/// ```
/// # use meos::TsTzSpanSet;
/// # use meos::meos_initialize;
/// # use std::str::FromStr;
/// # use meos::SpanSet;
/// # meos_initialize();
/// let span_set1 = TsTzSpanSet::from_str("{[2019-09-08 00:00:00+00, 2019-09-10 00:00:00+00], [2019-09-15 00:00:00+00, 2019-09-20 00:00:00+00]}").unwrap();
/// let span_set2 = TsTzSpanSet::from_str("{[2019-09-15 00:00:00+00, 2019-09-30 00:00:00+00], [2019-11-11 00:00:00+00, 2019-11-12 00:00:00+00]}").unwrap();
///
/// let expected_result = TsTzSpanSet::from_str("{[2019-09-15 00:00:00+00, 2019-09-20 00:00:00+00]}").unwrap();
/// assert_eq!((span_set1 & span_set2).unwrap(), expected_result);
/// ```
fn bitand(self, other: TsTzSpanSet) -> Self::Output {
self.intersection(&other)
}
}
impl BitOr for TsTzSpanSet {
type Output = Option<TsTzSpanSet>;
/// Computes the union of two `TsTzSpanSet`s.
///
/// ## Arguments
///
/// * `other` - Another `TsTzSpanSet` to union with.
///
/// ## Returns
///
/// * `Some(TsTzSpanSet)` - A new `TsTzSpanSet` containing the union.
/// * `None` - If the union is empty.
///
/// ## Example
///
/// ```
/// # use meos::TsTzSpanSet;
/// # use meos::meos_initialize;
/// # use std::str::FromStr;
/// # use meos::SpanSet;
/// # meos_initialize();
/// let span_set1 = TsTzSpanSet::from_str("{[2019-09-08 00:00:00+00, 2019-09-10 00:00:00+00], [2019-09-15 00:00:00+00, 2019-09-20 00:00:00+00]}").unwrap();
/// let span_set2 = TsTzSpanSet::from_str("{[2019-09-15 00:00:00+00, 2019-09-30 00:00:00+00], [2019-11-11 00:00:00+00, 2019-11-12 00:00:00+00]}").unwrap();
///
/// let expected_result = TsTzSpanSet::from_str("{[2019-09-08 00:00:00+00, 2019-09-10 00:00:00+00], [2019-09-15 00:00:00+00, 2019-09-30 00:00:00+00], [2019-11-11 00:00:00+00, 2019-11-12 00:00:00+00]}").unwrap();
/// assert_eq!((span_set1 | span_set2).unwrap(), expected_result)
/// ```
fn bitor(self, other: Self) -> Self::Output {
self.union(&other)
}
}