Implement file based Reporter

2 files changed, 41 insertions, 0 deletions

diff --git a/src/reporters/file/file.ts b/src/reporters/file/file.ts
new file mode 100644
index 0000000..5acde1e
--- /dev/null
+++ b/src/reporters/file/file.ts
@@ -0,0 +1,40 @@
+import { Reporter } from '../../models/reporter.model'
+import { Report } from '../../models/report.model'
+import { Context } from '../../models/context.model'
+import { nows as now } from '../../util'
+
+import { writeFile } from 'fs'
+
+const appendToFileName = (path: string, toAppend: string): string => {
+  const comps = path.split('.')
+  comps.splice(-1, -2, toAppend)
+  return comps.join('.')
+}
+
+/**
+ * Implementation of a Reporter that simply dumps
+ * an array of Report objects into a file named
+ * using config.reportFilename
+ */
+export class File implements Reporter {
+  name = 'File System Reporter'
+  private buff: Report[] = []
+  constructor(private ctx: Context) {}
+  public record(r: Report): void {
+    this.buff.push(r)
+  }
+
+  public toString() {
+    return JSON.stringify(this.buff, null, 2)
+  }
+
+  public publish(): Promise<void> {
+    return new Promise((resolve, reject) => {
+      const filename = appendToFileName(this.ctx.config.reportFilename, now())
+      // the Node fs API has aged great, thanks ry
+      writeFile(filename, this.toString(), err =>
+        err ? reject(err) : resolve()
+      )
+    })
+  }
+}
diff --git a/src/reporters/file/index.ts b/src/reporters/file/index.ts
new file mode 100644
index 0000000..dd901ee
--- /dev/null
+++ b/src/reporters/file/index.ts
@@ -0,0 +1 @@
+export { File } from './file'