Use correct latest crates.io version

For download count and license, get the correct latest version from the versions array.

Fix #9453

Author: nyurik

services/crates/crates-downloads.service.js

@@ -68,7 +68,14 @@ export default class CratesDownloads extends BaseCratesService {
   transform({ variant, json }) {
     switch (variant) {
       case 'dv':
-        return json.crate ? json.versions[0].downloads : json.version.downloads
+        let lastVer;
+        if (json.crate) {
+          const lastVerNum = json.crate.max_stable_version ? json.crate.max_stable_version : json.crate.max_version;
+          lastVer = json.versions.find(ver => ver.num === lastVerNum) || json.versions[0]
+        } else {
+          lastVer = json.version
+        }
+        return lastVer.downloads
       case 'dr':
         return json.crate.recent_downloads || 0
       default:

services/crates/crates-license.service.js

@@ -28,14 +28,22 @@ export default class CratesLicense extends BaseCratesService {
     return { message }
   }
 
-  static transform({ errors, version, versions }) {
+  static transform({ errors, version, versions, crate }) {
     // crates.io returns a 200 response with an errors object in
     // error scenarios, e.g. https://crates.io/api/v1/crates/libc/0.1
     if (errors) {
       throw new InvalidResponse({ prettyMessage: errors[0].detail })
     }
 
-    const license = version ? version.license : versions[0].license
+    let license;
+    if (version) {
+      license = version.license;
+    } else {
+      const lastVerNum = crate.max_stable_version ? crate.max_stable_version : crate.max_version;
+      const lastVer = versions.find(ver => ver.num === lastVerNum) || versions[0]
+      license = lastVer.license;
+    }
+
     if (!license) {
       throw new InvalidResponse({ prettyMessage: 'invalid null license' })
     }