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use std::ops::{Deref, DerefMut};
use crate::{Error, GetItems, Items, Result};
use geojson::Geometry;
use serde::{Deserialize, Serialize};
use serde_json::{Map, Value};
use stac::Item;
/// The core parameters for STAC search are defined by OAFeat, and STAC adds a few parameters for convenience.
#[derive(Clone, Default, Debug, Serialize, Deserialize)]
pub struct Search {
/// Many fields are shared with [Items], so we re-use that structure.
#[serde(flatten)]
pub items: Items,
/// Searches items by performing intersection between their geometry and provided GeoJSON geometry.
///
/// All GeoJSON geometry types must be supported.
#[serde(skip_serializing_if = "Option::is_none")]
pub intersects: Option<Geometry>,
/// Array of Item ids to return.
#[serde(skip_serializing_if = "Option::is_none")]
pub ids: Option<Vec<String>>,
/// Array of one or more Collection IDs that each matching Item must be in.
#[serde(skip_serializing_if = "Option::is_none")]
pub collections: Option<Vec<String>>,
}
/// GET parameters for the item search endpoint.
#[derive(Clone, Default, Debug, Serialize, Deserialize)]
pub struct GetSearch {
/// Many fields are shared with [Items], so we re-use that structure.
#[serde(flatten)]
pub items: GetItems,
/// Searches items by performing intersection between their geometry and provided GeoJSON geometry.
///
/// All GeoJSON geometry types must be supported.
#[serde(skip_serializing_if = "Option::is_none")]
pub intersects: Option<String>,
/// Comma-delimited list of Item ids to return.
#[serde(skip_serializing_if = "Option::is_none")]
pub ids: Option<String>,
/// Comma-delimited list of one or more Collection IDs that each matching Item must be in.
#[serde(skip_serializing_if = "Option::is_none")]
pub collections: Option<String>,
}
impl Search {
/// Creates a new, empty search.
///
/// # Examples
///
/// ```
/// use stac_api::Search;
///
/// let search = Search::new();
/// ```
pub fn new() -> Search {
Search::default()
}
/// Sets the ids field of this search.
///
/// # Examples
///
/// ```
/// use stac_api::Search;
/// let search = Search::new().ids(vec!["an-id".to_string()]);
/// ```
pub fn ids(mut self, ids: impl Into<Option<Vec<String>>>) -> Search {
self.ids = ids.into();
self
}
/// Returns an error if this search is invalid, e.g. if both bbox and intersects are specified.
///
/// Returns the search unchanged if it is valid.
///
/// # Examples
///
/// ```
/// use stac_api::Search;
/// use geojson::{Geometry, Value};
///
/// let mut search = Search::default();
/// search.items.bbox = Some(vec![-180.0, -90.0, 180.0, 80.0].try_into().unwrap());
/// search = search.valid().unwrap();
/// search.intersects = Some(Geometry::new(Value::Point(vec![0.0, 0.0])));
/// search.valid().unwrap_err();
/// ```
pub fn valid(mut self) -> Result<Search> {
self.items = self.items.valid()?;
if self.items.bbox.is_some() & self.intersects.is_some() {
Err(Error::SearchHasBboxAndIntersects(self.clone()))
} else {
Ok(self)
}
}
/// Returns true if this item matches this search.
///
/// # Examples
///
/// ```
/// use stac::Item;
/// use stac_api::Search;
///
/// let item = Item::new("an-id");
/// assert!(Search::new().matches(&item).unwrap());
/// assert!(!Search::new().ids(vec!["not-the-id".to_string()]).matches(&item).unwrap());
/// ```
pub fn matches(&self, item: &Item) -> Result<bool> {
Ok(self.collection_matches(item)
& self.id_matches(item)
& self.intersects_matches(item)?
& self.items.matches(item)?)
}
/// Returns true if this item's collection matches this search.
///
/// # Examples
///
/// ```
/// use stac_api::Search;
/// use stac::Item;
///
/// let mut search = Search::new();
/// let mut item = Item::new("item-id");
/// assert!(search.collection_matches(&item));
/// search.collections = Some(vec!["collection-id".to_string()]);
/// assert!(!search.collection_matches(&item));
/// item.collection = Some("collection-id".to_string());
/// assert!(search.collection_matches(&item));
/// item.collection = Some("another-collection-id".to_string());
/// assert!(!search.collection_matches(&item));
/// ```
pub fn collection_matches(&self, item: &Item) -> bool {
if let Some(collections) = self.collections.as_ref() {
if let Some(collection) = item.collection.as_ref() {
collections.contains(collection)
} else {
false
}
} else {
true
}
}
/// Returns true if this item's id matches this search.
///
/// # Examples
///
/// ```
/// use stac_api::Search;
/// use stac::Item;
///
/// let mut search = Search::new();
/// let mut item = Item::new("item-id");
/// assert!(search.id_matches(&item));
/// search.ids = Some(vec!["item-id".to_string()]);
/// assert!(search.id_matches(&item));
/// search.ids = Some(vec!["another-id".to_string()]);
/// assert!(!search.id_matches(&item));
/// ```
pub fn id_matches(&self, item: &Item) -> bool {
if let Some(ids) = self.ids.as_ref() {
ids.contains(&item.id)
} else {
true
}
}
/// Returns true if this item's geometry matches this search's intersects.
///
/// # Examples
///
/// ```
/// # #[cfg(feature = "geo")]
/// # {
/// use stac_api::Search;
/// use stac::Item;
/// use geojson::{Geometry, Value};
///
/// let mut search = Search::new();
/// let mut item = Item::new("item-id");
/// assert!(search.intersects_matches(&item).unwrap());
/// search.intersects = Some(Geometry::new(Value::Point(vec![-105.1, 41.1])));
/// assert!(!search.intersects_matches(&item).unwrap());
/// item.set_geometry(Geometry::new(Value::Point(vec![-105.1, 41.1])));
/// assert!(search.intersects_matches(&item).unwrap());
/// # }
/// ```
#[allow(unused_variables)]
pub fn intersects_matches(&self, item: &Item) -> Result<bool> {
if let Some(intersects) = self.intersects.clone() {
#[cfg(feature = "geo")]
{
let intersects: geo::Geometry = intersects.try_into()?;
item.intersects(&intersects).map_err(Error::from)
}
#[cfg(not(feature = "geo"))]
{
Err(Error::FeatureNotEnabled("geo"))
}
} else {
Ok(true)
}
}
}
impl TryFrom<Search> for GetSearch {
type Error = Error;
fn try_from(search: Search) -> Result<GetSearch> {
let get_items: GetItems = search.items.try_into()?;
let intersects = search
.intersects
.map(|intersects| serde_json::to_string(&intersects))
.transpose()?;
let collections = search.collections.map(|collections| collections.join(","));
let ids = search.ids.map(|ids| ids.join(","));
Ok(GetSearch {
items: get_items,
intersects,
ids,
collections,
})
}
}
impl TryFrom<GetSearch> for Search {
type Error = Error;
fn try_from(get_search: GetSearch) -> Result<Search> {
let items: Items = get_search.items.try_into()?;
let intersects = get_search
.intersects
.map(|intersects| serde_json::from_str(&intersects))
.transpose()?;
let collections = get_search
.collections
.map(|collections| collections.split(',').map(|s| s.to_string()).collect());
let ids = get_search
.ids
.map(|ids| ids.split(',').map(|s| s.to_string()).collect());
Ok(Search {
items,
intersects,
ids,
collections,
})
}
}
impl From<Items> for Search {
fn from(items: Items) -> Self {
Search {
items,
..Default::default()
}
}
}
impl stac::Fields for Search {
fn fields(&self) -> &Map<String, Value> {
&self.items.additional_fields
}
fn fields_mut(&mut self) -> &mut Map<String, Value> {
&mut self.items.additional_fields
}
}
impl Deref for Search {
type Target = Items;
fn deref(&self) -> &Self::Target {
&self.items
}
}
impl DerefMut for Search {
fn deref_mut(&mut self) -> &mut Self::Target {
&mut self.items
}
}