4 files changed, 162 insertions, 0 deletions
diff --git a/app_expo/components/button/button.presets.ts b/app_expo/components/button/button.presets.ts
new file mode 100644
index 0000000..bc0ad3f
--- /dev/null
+++ b/app_expo/components/button/button.presets.ts
@@ -0,0 +1,58 @@
+import { ViewStyle, TextStyle } from 'react-native'
+import { color, spacing } from '../../theme'
+
+/**
+ * All text will start off looking like this.
+ */
+const BASE_VIEW: ViewStyle = {
+  paddingVertical: spacing[2],
+  paddingHorizontal: spacing[2],
+  borderRadius: 4,
+  justifyContent: 'center',
+  alignItems: 'center',
+}
+
+const BASE_TEXT: TextStyle = {
+  paddingHorizontal: spacing[3],
+}
+
+/**
+ * All the variations of text styling within the app.
+ *
+ * You want to customize these to whatever you need in your app.
+ */
+export const viewPresets: Record<string, ViewStyle> = {
+  /**
+   * A smaller piece of secondard information.
+   */
+  primary: { ...BASE_VIEW, backgroundColor: color.palette.orange } as ViewStyle,
+
+  /**
+   * A button without extras.
+   */
+  link: {
+    ...BASE_VIEW,
+    paddingHorizontal: 0,
+    paddingVertical: 0,
+    alignItems: 'flex-start',
+  } as ViewStyle,
+}
+
+export const textPresets: Record<ButtonPresetNames, TextStyle> = {
+  primary: {
+    ...BASE_TEXT,
+    fontSize: 9,
+    color: color.palette.white,
+  } as TextStyle,
+  link: {
+    ...BASE_TEXT,
+    color: color.text,
+    paddingHorizontal: 0,
+    paddingVertical: 0,
+  } as TextStyle,
+}
+
+/**
+ * A list of preset names.
+ */
+export type ButtonPresetNames = keyof typeof viewPresets
diff --git a/app_expo/components/button/button.props.ts b/app_expo/components/button/button.props.ts
new file mode 100644
index 0000000..810e0aa
--- /dev/null
+++ b/app_expo/components/button/button.props.ts
@@ -0,0 +1,35 @@
+import { StyleProp, TextStyle, TouchableOpacityProps, ViewStyle } from 'react-native'
+import { ButtonPresetNames } from './button.presets'
+import { TxKeyPath } from '../../i18n'
+
+export interface ButtonProps extends TouchableOpacityProps {
+  /**
+   * Text which is looked up via i18n.
+   */
+  tx?: TxKeyPath
+
+  /**
+   * The text to display if not using `tx` or nested components.
+   */
+  text?: string
+
+  /**
+   * An optional style override useful for padding & margin.
+   */
+  style?: StyleProp<ViewStyle>
+
+  /**
+   * An optional style override useful for the button text.
+   */
+  textStyle?: StyleProp<TextStyle>
+
+  /**
+   * One of the different types of text presets.
+   */
+  preset?: ButtonPresetNames
+
+  /**
+   * One of the different types of text presets.
+   */
+  children?: React.ReactNode
+}
diff --git a/app_expo/components/button/button.story.tsx b/app_expo/components/button/button.story.tsx
new file mode 100644
index 0000000..54dc2a9
--- /dev/null
+++ b/app_expo/components/button/button.story.tsx
@@ -0,0 +1,33 @@
+import * as React from 'react'
+import { ViewStyle, TextStyle, Alert } from 'react-native'
+import { storiesOf } from '@storybook/react-native'
+import { StoryScreen, Story, UseCase } from '../../../storybook/views'
+import { Button } from './button'
+
+declare let module
+
+const buttonStyleArray: ViewStyle[] = [{ paddingVertical: 100 }, { borderRadius: 0 }]
+
+const buttonTextStyleArray: TextStyle[] = [{ fontSize: 20 }, { color: '#a511dc' }]
+
+storiesOf('Button', module)
+  .addDecorator((fn) => <StoryScreen>{fn()}</StoryScreen>)
+  .add('Style Presets', () => (
+    <Story>
+      <UseCase text="Primary" usage="The primary button.">
+        <Button text="Click It" preset="primary" onPress={() => Alert.alert('pressed')} />
+      </UseCase>
+      <UseCase text="Disabled" usage="The disabled behaviour of the primary button.">
+        <Button text="Click It" preset="primary" onPress={() => Alert.alert('pressed')} disabled />
+      </UseCase>
+      <UseCase text="Array Style" usage="Button with array style">
+        <Button
+          text="Click It"
+          preset="primary"
+          onPress={() => Alert.alert('pressed')}
+          style={buttonStyleArray}
+          textStyle={buttonTextStyleArray}
+        />
+      </UseCase>
+    </Story>
+  ))
diff --git a/app_expo/components/button/button.tsx b/app_expo/components/button/button.tsx
new file mode 100644
index 0000000..03b8f85
--- /dev/null
+++ b/app_expo/components/button/button.tsx
@@ -0,0 +1,36 @@
+import * as React from 'react'
+import { TouchableOpacity } from 'react-native'
+import { Text } from '../text/text'
+import { viewPresets, textPresets } from './button.presets'
+import { ButtonProps } from './button.props'
+
+/**
+ * For your text displaying needs.
+ *
+ * This component is a HOC over the built-in React Native one.
+ */
+export function Button(props: ButtonProps) {
+  // grab the props
+  const {
+    preset = 'primary',
+    tx,
+    text,
+    style: styleOverride,
+    textStyle: textStyleOverride,
+    children,
+    ...rest
+  } = props
+
+  const viewStyle = viewPresets[preset] || viewPresets.primary
+  const viewStyles = [viewStyle, styleOverride]
+  const textStyle = textPresets[preset] || textPresets.primary
+  const textStyles = [textStyle, textStyleOverride]
+
+  const content = children || <Text tx={tx} text={text} style={textStyles} />
+
+  return (
+    <TouchableOpacity style={viewStyles} {...rest}>
+      {content}
+    </TouchableOpacity>
+  )
+}