refactor: move classes into separate files

Part of #31

src/cli.js

@@ -10,6 +10,8 @@ const parseArgs = require('minimist')
 
 const { Parser } = require('node-sql-parser')
 
+const Generator = require('./generator/Generator')
+
 const endpointsFile = 'endpoints.yaml'
 
 const parseCommandLineArgs = (args) => {
@@ -335,81 +337,6 @@ const createTypeScriptConfig = async (destDir, lang) => {
     return fsPromises.writeFile(resultFile, tsConfigJson)
 }
 
-class JsGenerator {
-
-    usageExampleAsText() {
-        return `Use
-  npm install
-to install its dependencies and
-  export DB_NAME=db DB_USER=user DB_PASSWORD=secret
-  npm start
-afteward to run`
-    }
-
-}
-
-class TsGenerator {
-
-    usageExampleAsText() {
-        return `Use
-  npm install
-to install its dependencies,
-  npm run build
-to build the application, and
-  export DB_NAME=db DB_USER=user DB_PASSWORD=secret
-  npm start
-afteward to run`
-    }
-
-}
-
-class GoGenerator {
-
-    usageExampleAsText() {
-        return `Use
-  export DB_NAME=db DB_USER=user DB_PASSWORD=secret
-  go run *.go
-or
-  go build -o app
-  export DB_NAME=db DB_USER=user DB_PASSWORD=secret
-  ./app
-to build and run it`
-    }
-
-}
-
-class PyGenerator {
-
-    usageExampleAsText() {
-        return `Use
-  pip install -r requirements.txt
-to install its dependencies and
-  export DB_NAME=db DB_USER=user DB_PASSWORD=secret
-  uvicorn app:app
-afteward to run`
-    }
-
-}
-
-class Generator {
-
-    static for(lang) {
-        switch (lang) {
-            case 'js':
-                return new JsGenerator()
-            case 'ts':
-                return new TsGenerator()
-            case 'go':
-                return new GoGenerator()
-            case 'python':
-                return new PyGenerator()
-            default:
-                throw new Error(`Unsupported language: ${lang}`)
-        }
-    }
-
-}
-
 const absolutePathToDestDir = (argv) => {
     const relativeDestDir = argv._.length > 0 ? argv._[0] : argv['dest-dir']
     return path.resolve(process.cwd(), relativeDestDir)

src/generator/Generator.js

@@ -0,0 +1,23 @@
+const JsGenerator = require('./JsGenerator')
+const TsGenerator = require('./TsGenerator')
+const GoGenerator = require('./GoGenerator')
+const PyGenerator = require('./PyGenerator')
+
+module.exports = class Generator {
+
+    static for(lang) {
+        switch (lang) {
+            case 'js':
+                return new JsGenerator()
+            case 'ts':
+                return new TsGenerator()
+            case 'go':
+                return new GoGenerator()
+            case 'python':
+                return new PyGenerator()
+            default:
+                throw new Error(`Unsupported language: ${lang}`)
+        }
+    }
+
+}

src/generator/GoGenerator.js

@@ -0,0 +1,14 @@
+module.exports = class GoGenerator {
+
+    usageExampleAsText() {
+        return `Use
+  export DB_NAME=db DB_USER=user DB_PASSWORD=secret
+  go run *.go
+or
+  go build -o app
+  export DB_NAME=db DB_USER=user DB_PASSWORD=secret
+  ./app
+to build and run it`
+    }
+
+}

src/generator/JsGenerator.js

@@ -0,0 +1,12 @@
+module.exports = class JsGenerator {
+
+    usageExampleAsText() {
+        return `Use
+  npm install
+to install its dependencies and
+  export DB_NAME=db DB_USER=user DB_PASSWORD=secret
+  npm start
+afteward to run`
+    }
+
+}

src/generator/PyGenerator.js

@@ -0,0 +1,12 @@
+module.exports = class PyGenerator {
+
+    usageExampleAsText() {
+        return `Use
+  pip install -r requirements.txt
+to install its dependencies and
+  export DB_NAME=db DB_USER=user DB_PASSWORD=secret
+  uvicorn app:app
+afteward to run`
+    }
+
+}

src/generator/TsGenerator.js

@@ -0,0 +1,14 @@
+module.exports = class TsGenerator {
+
+    usageExampleAsText() {
+        return `Use
+  npm install
+to install its dependencies,
+  npm run build
+to build the application, and
+  export DB_NAME=db DB_USER=user DB_PASSWORD=secret
+  npm start
+afteward to run`
+    }
+
+}