Implement interface/config based infrastructure

Fixes #2

1 files changed, 27 insertions, 0 deletions

diff --git a/src/sources/FileSource.ts b/src/sources/FileSource.ts
new file mode 100644
index 0000000..fd4f6f7
--- /dev/null
+++ b/src/sources/FileSource.ts
@@ -0,0 +1,27 @@
+import {readFile} from 'fs';
+
+import {ISource} from './ISource';
+
+export class FileSource implements ISource {
+    private _path: string;
+    private _data: string = null;
+
+    constructor(path: string) {
+        this._path = path;
+    }
+
+    getData(): Promise<string> {
+        if (this._data) {
+            return Promise.resolve(this._data);
+        }
+
+        return new Promise<string>((resolve, reject) => {
+            readFile(this._path, (err, data) => {
+                if (err) return reject(err);
+
+                this._data = data.toString();
+                resolve(this._data);
+            });
+        });
+    }
+}