More work on search

server/npm/getAssetPaths.js

@@ -1,3 +1,4 @@
+const semver = require('semver')
 const assetPathsIndex = require('./assetPathsIndex')
 
 function getAssetPaths(packageName, version) {

server/npm/search.js

@@ -0,0 +1,88 @@
+const searchIndex = require('./searchIndex')
+const getAssetPaths = require('./getAssetPaths')
+
+function enhanceHit(hit) {
+  return new Promise(function (resolve, reject) {
+    const assetPaths = getAssetPaths(hit.name, hit.version)
+
+    if (assetPaths) {
+      // TODO: Double check the package metadata to ensure the files
+      // haven't moved from the paths in the index?
+      hit.assets = assetPaths.map(function (path) {
+        return `https://unpkg.com/${hit.name}@${hit.version}${path}`
+      })
+
+      resolve(hit)
+    } else {
+      resolve(hit)
+    }
+  })
+}
+
+function byRelevanceDescending(a, b) {
+  // Hits that have assets are more relevant.
+  return a.assets ? (b.assets ? 0 : -1) : (b.assets ? 1 : 0)
+}
+
+// add concatenated name for more relevance for people spelling without spaces
+// think: createreactnative instead of create-react-native-app
+function concat(string) {
+  return string.replace(/[-/@_.]+/g, '')
+}
+
+function search(query, page) {
+  return new Promise(function (resolve, reject) {
+    const hitsPerPage = 10
+
+    const params = {
+      // typoTolerance: 'min',
+      optionalFacetFilters: `concatenatedName:${concat(query)}`,
+      facets: [ 'keywords' ],
+      attributesToHighlight: null,
+      attributesToRetrieve: [
+        'description',
+        'githubRepo',
+        'keywords',
+        'license',
+        'name',
+        'owner',
+        'version'
+      ],
+      // restrictSearchableAttributes: [
+      //   'name',
+      //   'description',
+      //   'keywords'
+      // ],
+      hitsPerPage,
+      page
+    }
+
+    searchIndex.search(query, params, function (error, value) {
+      if (error) {
+        reject(error)
+      } else {
+        resolve(
+          Promise.all(
+            value.hits.map(enhanceHit)
+          ).then(function (hits) {
+            hits.sort(byRelevanceDescending)
+
+            const totalHits = value.nbHits
+            const totalPages = value.nbPages
+
+            return {
+              query,
+              page,
+              hitsPerPage,
+              totalHits,
+              totalPages,
+              hits
+            }
+          })
+        )
+      }
+    })
+  })
+}
+
+module.exports = search