fix(core): don't take an href when making links absolute

api/src/collections.rs

@@ -1,6 +1,6 @@
 use serde::{Deserialize, Serialize};
 use serde_json::{Map, Value};
-use stac::{Collection, Link, Links};
+use stac::{Collection, Href, Link, Links};
 
 /// Object containing an array of collections and an array of links.
 #[derive(Debug, Serialize, Deserialize)]
@@ -14,6 +14,9 @@ pub struct Collections {
     /// Additional fields.
     #[serde(flatten)]
     pub additional_fields: Map<String, Value>,
+
+    #[serde(skip)]
+    href: Option<String>,
 }
 
 impl From<Vec<Collection>> for Collections {
@@ -22,10 +25,23 @@ impl From<Vec<Collection>> for Collections {
             collections,
             links: Vec::new(),
             additional_fields: Map::new(),
+            href: None,
         }
     }
 }
 
+impl Href for Collections {
+    fn href(&self) -> Option<&str> {
+        self.href.as_deref()
+    }
+    fn set_href(&mut self, href: impl ToString) {
+        self.href = Some(href.to_string());
+    }
+    fn clear_href(&mut self) {
+        self.href = None;
+    }
+}
+
 impl Links for Collections {
     fn links(&self) -> &[Link] {
         &self.links

api/src/item_collection.rs

@@ -1,7 +1,7 @@
 use crate::{Item, Result};
 use serde::{Deserialize, Serialize};
 use serde_json::{Map, Value};
-use stac::{Link, Links};
+use stac::{Href, Link, Links};
 
 const ITEM_COLLECTION_TYPE: &str = "FeatureCollection";
 
@@ -71,6 +71,9 @@ pub struct ItemCollection {
     /// pagination information (tokens) to later be turned into links.
     #[serde(skip)]
     pub last: Option<Map<String, Value>>,
+
+    #[serde(skip)]
+    href: Option<String>,
 }
 
 /// The search-related metadata for the [ItemCollection].
@@ -118,10 +121,23 @@ impl ItemCollection {
             prev: None,
             first: None,
             last: None,
+            href: None,
         })
     }
 }
 
+impl Href for ItemCollection {
+    fn set_href(&mut self, href: impl ToString) {
+        self.href = Some(href.to_string());
+    }
+    fn clear_href(&mut self) {
+        self.href = None;
+    }
+    fn href(&self) -> Option<&str> {
+        self.href.as_deref()
+    }
+}
+
 impl Links for ItemCollection {
     fn links(&self) -> &[Link] {
         &self.links
@@ -145,6 +161,7 @@ impl Default for ItemCollection {
             prev: None,
             first: None,
             last: None,
+            href: None,
         }
     }
 }

cli/src/args/serve.rs

@@ -1,6 +1,6 @@
 use super::{Input, Run};
 use crate::{Error, Result, Value};
-use stac::{Collection, Href, Item, Links};
+use stac::{Collection, Item, Links};
 use stac_server::{Api, Backend as _, MemoryBackend};
 use std::collections::{HashMap, HashSet};
 use tokio::{net::TcpListener, sync::mpsc::Sender, task::JoinSet};
@@ -94,8 +94,7 @@ impl Run for Args {
                 }
                 Value::Collection(mut collection) => {
                     if self.load_collection_items {
-                        let href = collection.href().expect("we just read it").to_string();
-                        collection.make_relative_links_absolute(href)?;
+                        collection.make_relative_links_absolute()?;
                         for link in collection.iter_item_links() {
                             let href = link.href.to_string();
                             let input = input.with_href(href);

core/src/error.rs

@@ -83,6 +83,10 @@ pub enum Error {
     #[error("no items")]
     NoItems,
 
+    /// There is not an href, when an href is required.
+    #[error("no href")]
+    NoHref,
+
     /// This value is not an item.
     #[error("value is not an item")]
     NotAnItem(Value),

core/src/link.rs

@@ -1,6 +1,6 @@
 //! Links.
 
-use crate::{mime::APPLICATION_GEOJSON, Error, Result};
+use crate::{mime::APPLICATION_GEOJSON, Error, Href, Result};
 use mime::APPLICATION_JSON;
 use serde::{Deserialize, Serialize};
 use serde_json::{Map, Value};
@@ -88,7 +88,7 @@ pub struct Link {
 }
 
 /// Implemented by any object that has links.
-pub trait Links {
+pub trait Links: Href {
     /// Returns a reference to this object's links.
     ///
     /// # Examples
@@ -217,7 +217,7 @@ pub trait Links {
         Box::new(self.links().iter().filter(|link| link.is_item()))
     }
 
-    /// Makes all relative links absolute with respect to an href.
+    /// Makes all relative links absolute with respect to this object's href.
     ///
     /// # Examples
     ///
@@ -226,15 +226,19 @@ pub trait Links {
     ///
     /// let mut catalog: stac::Catalog = stac::read("examples/catalog.json").unwrap();
     /// assert!(!catalog.root_link().unwrap().is_absolute());
-    /// catalog.make_relative_links_absolute("examples/catalog.json").unwrap();
+    /// catalog.make_relative_links_absolute().unwrap();
     /// assert!(catalog.root_link().unwrap().is_absolute());
     /// ```
-    fn make_relative_links_absolute(&mut self, href: impl ToString) -> Result<()> {
-        let href = make_absolute(href.to_string(), None)?;
-        for link in self.links_mut() {
-            link.href = make_absolute(std::mem::take(&mut link.href), Some(&href))?;
+    fn make_relative_links_absolute(&mut self) -> Result<()> {
+        if let Some(href) = self.href() {
+            let href = make_absolute(href.to_string(), None)?;
+            for link in self.links_mut() {
+                link.href = make_absolute(std::mem::take(&mut link.href), Some(&href))?;
+            }
+            Ok(())
+        } else {
+            Err(Error::NoHref)
         }
-        Ok(())
     }
 
     /// Makes all absolute links relative with respect to an href.
@@ -817,7 +821,7 @@ mod tests {
     }
 
     mod links {
-        use crate::{Catalog, Item, Link, Links};
+        use crate::{Catalog, Href, Item, Link, Links};
 
         #[test]
         fn link() {
@@ -846,9 +850,7 @@ mod tests {
         #[test]
         fn make_relative_links_absolute_path() {
             let mut catalog: Catalog = crate::read("examples/catalog.json").unwrap();
-            catalog
-                .make_relative_links_absolute("examples/catalog.json")
-                .unwrap();
+            catalog.make_relative_links_absolute().unwrap();
             for link in catalog.links() {
                 assert!(link.is_absolute());
             }
@@ -857,9 +859,8 @@ mod tests {
         #[test]
         fn make_relative_links_absolute_url() {
             let mut catalog: Catalog = crate::read("examples/catalog.json").unwrap();
-            catalog
-                .make_relative_links_absolute("http://stac-rs.test/catalog.json")
-                .unwrap();
+            catalog.set_href("http://stac-rs.test/catalog.json");
+            catalog.make_relative_links_absolute().unwrap();
             for link in catalog.links() {
                 assert!(link.is_absolute());
             }
@@ -872,9 +873,7 @@ mod tests {
         #[test]
         fn make_absolute_links_relative_path() {
             let mut catalog: Catalog = crate::read("examples/catalog.json").unwrap();
-            catalog
-                .make_relative_links_absolute("examples/catalog.json")
-                .unwrap();
+            catalog.make_relative_links_absolute().unwrap();
             catalog.make_absolute_links_relative("examples/").unwrap();
             for link in catalog.links() {
                 if !link.is_self() {
@@ -886,9 +885,8 @@ mod tests {
         #[test]
         fn make_absolute_links_relative_url() {
             let mut catalog: Catalog = crate::read("examples/catalog.json").unwrap();
-            catalog
-                .make_relative_links_absolute("http://stac-rs.test/catalog.json")
-                .unwrap();
+            catalog.set_href("http://stac-rs.test/catalog.json");
+            catalog.make_relative_links_absolute().unwrap();
             catalog
                 .make_absolute_links_relative("http://stac-rs.test/")
                 .unwrap();