feat(util): add get prefix utility function

Ovidiu Barabula · Ovidiu Barabula · commit 8029051343ef · 2018-04-20T16:18:36.000+03:00
diff --git a/src/util/utility-functions.spec.ts b/src/util/utility-functions.spec.ts
@@ -10,6 +10,7 @@ import {
   ERRORS,
   flattenArray,
   getFnName,
+  getPrefix,
   hasAllKeys,
   hasNested,
   limitFn,
@@ -508,4 +509,21 @@ describe('Utility Functions', () => {
       assert.throws(() => arrayOf([], false, true), ERRORS.ARRAYOF_NEEDS_STRINGS);
     });
   });
+
+
+  describe('getPrefix()', () => {
+    it('extracts prefix from prefixed string', () => {
+      expect(getPrefix('foo:bar')).to.equal('foo');
+    });
+
+
+    it('extracts prefix from prefixed string with custom separator', () => {
+      expect(getPrefix('foo|bar', '|')).to.equal('foo');
+    });
+
+
+    it('returns the original string if strings lacks separator', () => {
+      expect(getPrefix('foo')).to.equal('foo');
+    });
+  });
 });
diff --git a/src/util/utility-functions.ts b/src/util/utility-functions.ts
@@ -306,7 +306,9 @@ export function pluginPrefix(name: string): string {
 
 
 /**
- * Create plugin name
+ * Create plugin name (e.g. 'foo' -> 'frontvue-plugin-foo')
+ * @param name Plugin name
+ * @param prefix Prefix to be added
  */
 export function pluginName(name: string, prefix: string = 'frontvue'): string {
   if (name.indexOf('frontvue-plugin') === 0) {
@@ -317,6 +319,20 @@ export function pluginName(name: string, prefix: string = 'frontvue'): string {
 }
 
 
+/**
+ * Extract prefix from string (e.g. 'foo:bar' -> 'foo')
+ * @param string String to extract prefix from
+ * @param separator Separator character
+ */
+export function getPrefix(string: string, separator: string = ':'): string {
+  if (string.includes(separator)) {
+    return string.split(separator)[0];
+  }
+
+  return string;
+}
+
+
 /**
  * Require node module
  * Bypass webpack require replacement
