Added an option to prevent model names capitalization

Fixes #319

Author: Luis Fernando Planella Gonzalez

lib/gen-type.ts

@@ -43,7 +43,7 @@ export abstract class GenType {
     this.qualifiedName = this.typeName;
     if (this.namespace) {
       this.fileName = this.namespace + '/' + this.fileName;
-      this.qualifiedName = typeName(this.namespace) + this.typeName;
+      this.qualifiedName = typeName(this.namespace, options) + this.typeName;
     }
     this._imports = new Imports(options);
   }

lib/gen-utils.ts

@@ -71,8 +71,12 @@ export function ensureNotReserved(name: string): string {
 /**
  * Returns the type (class) name for a given regular name
  */
-export function typeName(name: string): string {
-  return upperFirst(methodName(name));
+export function typeName(name: string, options?: Options): string {
+  if (options?.camelizeModelNames === false) {
+    return upperFirst(toBasicChars(name, true));
+  } else {
+    return upperFirst(methodName(name));
+  }
 }
 
 /**
@@ -145,14 +149,14 @@ export function tsComments(description: string | undefined, level: number, depre
  * Applies the prefix and suffix to a model class name
  */
 export function modelClass(baseName: string, options: Options) {
-  return `${options.modelPrefix || ''}${typeName(baseName)}${options.modelSuffix || ''}`;
+  return `${options.modelPrefix || ''}${typeName(baseName, options)}${options.modelSuffix || ''}`;
 }
 
 /**
  * Applies the prefix and suffix to a service class name
  */
 export function serviceClass(baseName: string, options: Options) {
-  return `${options.servicePrefix || ''}${typeName(baseName)}${options.serviceSuffix || 'Service'}`;
+  return `${options.servicePrefix || ''}${typeName(baseName, options)}${options.serviceSuffix || 'Service'}`;
 }
 
 /**

lib/options.ts

@@ -120,4 +120,7 @@ export interface Options {
 
   /** When true, no verbose output will be displayed */
   silent?: boolean;
+
+  /** When true (default) models names will be camelized, besides having the first letter capitalized. Setting to false will prevent camelizing. */
+  camelizeModelNames?: boolean;
 }

ng-openapi-gen-schema.json

@@ -217,6 +217,11 @@
       "description": "When set to true, no verbose output will be displayed.",
       "default": "false",
       "type": "boolean"
+    },
+    "camelizeModelNames": {
+      "description": "When true (default) models names will be camelized, besides having the first letter capitalized. Setting to false will prevent camelizing.",
+      "default": "true",
+      "type": "boolean"
     }
   }
 }

test/camelize-model-names.config.json

@@ -0,0 +1,9 @@
+{
+  "$schema": "../ng-openapi-gen-schema.json",
+  "input": "keep-model-names.json",
+  "output": "out/keep-model-names/",
+  "camelizeModelNames": false,
+  "ignoreUnusedModels": false,
+  "modelPrefix": "Pre",
+  "modelSuffix": "Pos"
+}

test/camelize-model-names.json

@@ -0,0 +1,28 @@
+{
+  "openapi": "3.0",
+  "info": {
+    "title": "Test for keepModelNames",
+    "version": "1.0"
+  },
+  "paths": [],
+  "components": {
+    "schemas": {
+      "snake-case": {
+        "type": "object",
+        "properties": {
+          "name": {
+            "type": "string"
+          }
+        }
+      },
+      "camelCase": {
+        "type": "object",
+        "properties": {
+          "name": {
+            "type": "string"
+          }
+        }
+      }
+    }
+  }
+}

test/camelize-model-names.spec.ts

@@ -0,0 +1,38 @@
+import { OpenAPIObject } from '@loopback/openapi-v3-types';
+import { InterfaceDeclaration, TypescriptParser } from 'typescript-parser';
+import { NgOpenApiGen } from '../lib/ng-openapi-gen';
+import { Options } from '../lib/options';
+import options from './camelize-model-names.config.json';
+import camelizeModelNamesSpec from './camelize-model-names.json';
+
+const gen = new NgOpenApiGen(camelizeModelNamesSpec as OpenAPIObject, options as Options);
+gen.generate();
+
+describe('Generation tests using camelize-model-names.json', () => {
+  it('snake-case model', done => {
+    const ref = gen.models.get('snake-case');
+    const ts = gen.templates.apply('model', ref);
+    const parser = new TypescriptParser();
+    parser.parseSource(ts).then(ast => {
+      expect(ast.imports.length).toBe(0);
+      expect(ast.declarations.length).toBe(1);
+      expect(ast.declarations[0]).toEqual(jasmine.any(InterfaceDeclaration));
+      const decl = ast.declarations[0] as InterfaceDeclaration;
+      expect(decl.name).toBe('PreSnake_casePos');
+      done();
+    });
+  });
+  it('camelCase model', done => {
+    const ref = gen.models.get('camelCase');
+    const ts = gen.templates.apply('model', ref);
+    const parser = new TypescriptParser();
+    parser.parseSource(ts).then(ast => {
+      expect(ast.imports.length).toBe(0);
+      expect(ast.declarations.length).toBe(1);
+      expect(ast.declarations[0]).toEqual(jasmine.any(InterfaceDeclaration));
+      const decl = ast.declarations[0] as InterfaceDeclaration;
+      expect(decl.name).toBe('PreCamelCasePos');
+      done();
+    });
+  });
+});