hal iteration

Author: plehegar

lib/hal.js

@@ -0,0 +1,39 @@
+import { json } from './fetch.js';
+
+/** This will take care of the W3C HAL API */
+export
+async function* hal(propertyTarget, link, embed, objFct) {
+  while (true) {
+    let apiURL = new URL(link);
+    if (embed === true) {
+      apiURL.searchParams.set("embed", "1"); // grab everything
+    }
+    let data = await json(apiURL);
+    if (embed) {
+      for (const target of data._embedded[propertyTarget]) {
+        if (objFct) {
+          yield objFct(target);
+        } else {
+          yield target;
+        }
+      }
+    } else {
+      if (data._links[propertyTarget]) {
+        for (const target of data._links[propertyTarget]) {
+          if (objFct) {
+            yield objFct(target);
+          } else {
+            yield target;
+          }
+        }
+      }
+    }
+    if (data.pages && data.pages > 1 && data.page < data.pages) {
+      link = data._links.next.href;
+    } else {
+      return;
+    }
+  }
+}
+
+export default hal;