feat(theme): themed-style component (#176)

* chore(playground): themed component example

* refactor(theme): module structure

* feat(theme): themed component props forward

* feat(theme): themed-styles component

* refactor(theme): themed-styles component to separate file

* test(theme): themed-styles component tests

* test(theme): describe themed component and styled themed component tests

* chore(playground): remove themed component example

* chore(lint): update tslint to ignore arrow-functions semicolon

* refactor(theme): fix code style issues

* test(theme): add theme change test

* refactor(theme): fix code style issues

* test(theme): add theme provider overrides parent theme test

* refactor(theme): remove untracked files

src/framework/theme/component/index.ts

@@ -1,5 +1,4 @@
-export { ThemeProvider } from './theme-provider.component';
-export {
-  withTheme,
-  ThemedComponentProps,
-} from './theme-consumer.component';
+export { ThemeProvider } from './themeProvider.component';
+export { withTheme } from './themeConsumer.component';
+export { withThemedStyles } from './themeConsumerStyled.component';
+export { ThemeType } from './type';

src/framework/theme/component/themeConsumer.component.tsx

@@ -0,0 +1,48 @@
+import React, { ComponentType } from 'react';
+import { ThemeType } from './type';
+import {
+  Consumer,
+  forwardProps,
+} from '../service';
+
+export interface Props<P> extends React.ClassAttributes<P> {
+  theme: ThemeType;
+}
+
+export function withTheme<P extends Props<P>>(Component: ComponentType<P>) {
+  type TExcept = Exclude<keyof P, keyof Props<P>>;
+  type ForwardedProps = Pick<P, TExcept>;
+
+  class Shadow extends React.Component<ForwardedProps> {
+    wrappedComponentRef = undefined;
+    getWrappedInstance = undefined;
+
+    setWrappedComponentRef = (ref) => {
+      this.wrappedComponentRef = ref;
+    };
+
+    renderWrappedComponent = (theme: ThemeType) => (
+      <Component
+        ref={this.setWrappedComponentRef}
+        theme={theme}
+        {...this.props}
+      />
+    );
+
+    render() {
+      return (
+        <Consumer>
+          {this.renderWrappedComponent}
+        </Consumer>
+      );
+    }
+  }
+
+  const Result = Shadow;
+  Result.prototype.getWrappedInstance = function getWrappedInstance() {
+    const hasWrappedInstance = this.wrappedComponentRef && this.wrappedComponentRef.getWrappedInstance;
+    return hasWrappedInstance ? this.wrappedComponentRef.getWrappedInstance() : this.wrappedComponentRef;
+  };
+
+  return forwardProps(Component, Result);
+}

src/framework/theme/component/themeConsumerStyled.component.tsx

@@ -0,0 +1,61 @@
+import React from 'react';
+import { StyleSheet } from 'react-native';
+import {
+  ThemeType,
+  ThemedStyleType,
+  StyleSheetType,
+} from './type';
+import {
+  Consumer,
+  forwardProps,
+} from '../service';
+
+export interface Props<P> extends React.ClassAttributes<P> {
+  theme: ThemeType;
+  themedStyle: ThemedStyleType;
+}
+
+export function withThemedStyles<P extends Props<P>>(
+  Component: React.ComponentType<P>,
+  createStyles: (theme: ThemeType) => StyleSheetType,
+) {
+  type TExcept = Exclude<keyof P, keyof Props<P>>;
+  type ForwardedProps = Pick<P, TExcept>;
+
+  class Shadow extends React.Component<ForwardedProps> {
+    wrappedComponentRef = undefined;
+    getWrappedInstance = undefined;
+
+    setWrappedComponentRef = (ref) => {
+      this.wrappedComponentRef = ref;
+    };
+
+    renderWrappedComponent = (theme: ThemeType) => {
+      const styles = StyleSheet.create(createStyles(theme));
+      return (
+        <Component
+          ref={this.setWrappedComponentRef}
+          theme={theme}
+          themedStyle={styles}
+          {...this.props}
+        />
+      );
+    };
+
+    render() {
+      return (
+        <Consumer>
+          {this.renderWrappedComponent}
+        </Consumer>
+      );
+    }
+  }
+
+  const Result = Shadow;
+  Result.prototype.getWrappedInstance = function getWrappedInstance() {
+    const hasWrappedInstance = this.wrappedComponentRef && this.wrappedComponentRef.getWrappedInstance;
+    return hasWrappedInstance ? this.wrappedComponentRef.getWrappedInstance() : this.wrappedComponentRef;
+  };
+
+  return forwardProps(Component, Result);
+}

src/framework/theme/component/themeProvider.component.tsx

@@ -0,0 +1,24 @@
+import React, { ReactNode } from 'react';
+import { Provider } from '../service';
+import { ThemeType } from './type';
+
+interface Props {
+  children: JSX.Element | ReactNode;
+  theme: ThemeType;
+}
+
+export class ThemeProvider extends React.PureComponent<Props> {
+
+  static defaultProps = {
+    theme: {},
+  };
+
+  render() {
+    return (
+      <Provider
+        value={this.props.theme}>
+        {this.props.children}
+      </Provider>
+    );
+  }
+}

src/framework/theme/component/type.ts

@@ -0,0 +1,5 @@
+// TODO(@type): declare theme types
+
+export type ThemeType = any;
+export type ThemedStyleType = any;
+export type StyleSheetType = any;

src/framework/theme/index.ts

@@ -1 +1,2 @@
 export * from './component';
+export * from './service';

src/framework/theme/service/index.ts

@@ -1,2 +1,5 @@
-export { Consumer, Provider } from './react-context.service';
-export { forwardProps } from './react-props-mapping.service';
+export {
+  Provider,
+  Consumer,
+} from './reactContext.service';
+export { forwardProps } from './reactPropsForward.service';

src/framework/theme/service/reactContext.service.ts

@@ -0,0 +1,14 @@
+import React from 'react';
+import { ThemeType } from '../component';
+
+const defaultThemeValue: ThemeType = {};
+
+const {
+  Provider,
+  Consumer,
+} = React.createContext(defaultThemeValue);
+
+export {
+  Provider,
+  Consumer,
+};

src/framework/theme/service/react-props-mapping.service.ts → src/framework/theme/service/reactPropsForward.service.ts

@@ -26,7 +26,7 @@ const REACT_METHODS = [
 ];
 
 export function forwardProps<P>(Source: ComponentType<P>, Target: ComponentType<P>): ComponentType<P> {
-  function filterProps(prop) {
+  const filterProps = (prop) => {
     // React specific methods and properties or properties from React's prototype
     const isReactProp = REACT_METHODS.includes(prop) || prop in React.Component.prototype;
     // Properties from enhanced component's prototype
@@ -35,26 +35,26 @@ export function forwardProps<P>(Source: ComponentType<P>, Target: ComponentType<
     const isPrivateProp = prop.startsWith('_');
 
     return !(isReactProp || isTargetProp || isPrivateProp);
-  }
+  };
 
-  function mapProps(prop) {
+  const mapProps = (prop) => {
     if (typeof Source.prototype[prop] === 'function') {
       // Make sure the function is called with correct context
       Target.prototype[prop] = function (...args) {
-        return Source.prototype[prop].apply(this.getConsumingComponent(), args);
+        return Source.prototype[prop].apply(this.getWrappedInstance(), args);
       };
     } else {
       // Copy properties as getters and setters
       Object.defineProperty(Target.prototype, prop, {
         get() {
-          return this.getConsumingComponent()[prop];
+          return this.getWrappedInstance()[prop];
         },
         set(value) {
-          this.getConsumingComponent()[prop] = value;
+          this.getWrappedInstance()[prop] = value;
         },
       });
     }
-  }
+  };
 
   Object.getOwnPropertyNames(Source.prototype).filter(filterProps).forEach(mapProps);