Add getPackages for generating sitemap (#251)

lib/dms.js

@@ -13,10 +13,17 @@ class DmsModel {
   }
 
   async getJsonResponse(params, action) {
+    let url
 
-    let query = querystring.stringify(params)
+    if (params !== {}) {
+
+      let query = querystring.stringify(params)
+
+      url = new URL(resolve(this.api, action + '?' + query))
+    } else {
+      url = new URL(resolve(this.api, action))
+    }
 
-    let url = new URL(resolve(this.api, action + '?' + query))
     let response = await fetch(url, { 
       headers: { 'User-Agent': 'frontend-v2/latest (internal API call from frontend app)' }
     })
@@ -50,6 +57,18 @@ class DmsModel {
     return response.result
   }
 
+  async getPackages(context, limit = 1000, offset = 0) {
+    const action = 'package_search'
+    const params = {
+      rows: limit,
+      start: offset
+    }
+
+    const response = await this.getJsonResponse(params, action)
+
+    return response.result.results
+  }
+
   async getPackage(name, includeViewsAndSchema = true) {
     const action = 'package_show'
     const params = {