split out retrive and put methods

src/store.js

@@ -103,7 +103,25 @@ class Store {
 	}
 
 	/**
-	 * Request a url from storage
+	 * Put binary data from a url to storage
+	 * @param  {string} url  a url to request from storage
+	 * @return {Promise<Blob>}
+	 */
+	put(url) {
+		let encodedUrl = window.encodeURIComponent(url);
+
+		return localforage.getItem(encodedUrl).then((result) => {
+			if (!result) {
+				return this.requester(url, "binary", withCredentials, headers).then((data) => {
+					return localforage.setItem(encodedUrl, data);
+				});
+			}
+			return result;
+		});
+	}
+
+	/**
+	 * Request a url
 	 * @param  {string} url  a url to request from storage
 	 * @param  {string} [type] specify the type of the returned result
 	 * @param  {boolean} [withCredentials]
@@ -111,26 +129,31 @@ class Store {
 	 * @return {Promise<Blob | string | JSON | Document | XMLDocument>}
 	 */
 	request(url, type, withCredentials, headers){
+		if (this.online) {
+			// From network
+			return this.requester(url, type, withCredentials, headers).then((data) => {
+				// save to store if not present
+				this.put(url);
+				return data;
+			})
+		} else {
+			// From store
+			return this.retrieve(url, type);
+		}
+
+	}
+
+	/**
+	 * Request a url from storage
+	 * @param  {string} url  a url to request from storage
+	 * @param  {string} [type] specify the type of the returned result
+	 * @return {Promise<Blob | string | JSON | Document | XMLDocument>}
+	 */
+	retrieve(url, type) {
 		var deferred = new defer();
 		var response;
 		var path = new Path(url);
 
-		if (this.online) {
-			return this.requester(url, type, withCredentials, headers).then((data) => {
-				// from network
-				let encodedUrl = window.encodeURIComponent(url);
-
-				localforage.getItem(encodedUrl).then((result) => {
-					if (!result) {
-						this.requester(url, "binary", withCredentials, headers).then((data) => {
-							localforage.setItem(encodedUrl, data);
-						});
-					}
-				});
-
-				return data;
-			})
-		} else {
 		// If type isn't set, determine it from the file extension
 		if(!type) {
 			type = path.extension;
@@ -159,8 +182,6 @@ class Store {
 		});
 	}
 
-	}
-
 	/**
 	 * Handle the response from request
 	 * @private

types/store.d.ts

@@ -6,8 +6,12 @@ export default class Store {
 
   add(resources: Resources, force?: boolean): Promise<Array<object>>;
 
+  put(url: string): Promise<Blob>;
+
   request(url: string, type?: string, withCredentials?: boolean, headers?: object): Promise<Blob | string | JSON | Document | XMLDocument>;
 
+  retrieve(url: string, type?: string): Promise<Blob | string | JSON | Document | XMLDocument>;
+
   getBlob(url: string, mimeType?: string): Promise<Blob>;
 
   getText(url: string): Promise<string>;