From adc134575c94242b3a1bf087cfeb8a09d3bc31d2 Mon Sep 17 00:00:00 2001
From: devcorpio <adelgado.devcorpio@gmail.com>
Date: Sat, 12 Jan 2019 20:32:05 +0100
Subject: [PATCH] chapter 05: copy logAnalyzer.js, errors and fakes from the
 folder of chapter 04 in order to continue with the book

---
 .../errors/ArgumentError.js                   |  3 ++
 .../fakes/fakeWebService.js                   | 21 ++++++++
 .../logAnalyzer.js                            | 53 +++++++++++++++++++
 3 files changed, 77 insertions(+)
 create mode 100644 chapter_05-isolation-frameworks/errors/ArgumentError.js
 create mode 100644 chapter_05-isolation-frameworks/fakes/fakeWebService.js
 create mode 100644 chapter_05-isolation-frameworks/logAnalyzer.js

diff --git a/chapter_05-isolation-frameworks/errors/ArgumentError.js b/chapter_05-isolation-frameworks/errors/ArgumentError.js
new file mode 100644
index 0000000..d2a2476
--- /dev/null
+++ b/chapter_05-isolation-frameworks/errors/ArgumentError.js
@@ -0,0 +1,3 @@
+class ArgumentError extends Error {}
+
+module.exports = ArgumentError;
diff --git a/chapter_05-isolation-frameworks/fakes/fakeWebService.js b/chapter_05-isolation-frameworks/fakes/fakeWebService.js
new file mode 100644
index 0000000..d6d9d64
--- /dev/null
+++ b/chapter_05-isolation-frameworks/fakes/fakeWebService.js
@@ -0,0 +1,21 @@
+function fakeWebService() {
+    let lastError;
+
+    /**
+     * @param {string} message
+     */
+    function logError(message) {
+        lastError = message;
+    }
+
+    function getLastError() {
+        return lastError;
+    }
+
+    return {
+        logError,
+        getLastError,
+    };
+}
+
+module.exports = fakeWebService;
diff --git a/chapter_05-isolation-frameworks/logAnalyzer.js b/chapter_05-isolation-frameworks/logAnalyzer.js
new file mode 100644
index 0000000..2180119
--- /dev/null
+++ b/chapter_05-isolation-frameworks/logAnalyzer.js
@@ -0,0 +1,53 @@
+const ArgumentError = require('./errors/ArgumentError');
+
+function logAnalyzer(extensionManager, webService) {
+    /**
+     * @type {boolean}
+     */
+    let wasLastFileNameValid;
+
+    /**
+     * @return {boolean}
+     */
+    function getWasLastFileNameValid() {
+        return wasLastFileNameValid;
+    }
+
+    /**
+     * @param {string} fileName
+     * @return {Promise}
+     */
+    async function isValidLogFileName(fileName) {
+        wasLastFileNameValid = false;
+
+        if (fileName === '') {
+            throw new ArgumentError('filename has to be provided');
+        }
+
+        const result = await extensionManager.isValid(fileName);
+
+        if (!result) {
+            return false;
+        }
+
+        wasLastFileNameValid = true;
+        return true;
+    }
+
+    /**
+     * @param {string} fileName
+     */
+    function analyze(fileName) {
+        if (fileName.length < 8) {
+            webService.logError(`Filename too short: ${fileName}`);
+        }
+    }
+
+    return {
+        getWasLastFileNameValid,
+        isValidLogFileName,
+        analyze,
+    };
+}
+
+module.exports = logAnalyzer;