Use dropdown for web reposting and quote posting (#607)

* Use dropdown for web reposting and quote posting

* Remove collateral damage

* Tune the repost dropdown positioning

* Move postctrls into their own folder

* Factor out repost button into native/web build

---------

Co-authored-by: Paul Frazee <pfrazee@gmail.com>

src/view/com/util/post-ctrls/RepostButton.tsx

@@ -0,0 +1,95 @@
+import React, {useCallback} from 'react'
+import {StyleProp, StyleSheet, TouchableOpacity, ViewStyle} from 'react-native'
+import {RepostIcon} from 'lib/icons'
+import {s, colors} from 'lib/styles'
+import {useTheme} from 'lib/ThemeContext'
+import {Text} from '../text/Text'
+import {useStores} from 'state/index'
+
+const HITSLOP = {top: 5, left: 5, bottom: 5, right: 5}
+
+interface Props {
+  isReposted: boolean
+  repostCount?: number
+  big?: boolean
+  onRepost: () => void
+  onQuote: () => void
+}
+
+export const RepostButton = ({
+  isReposted,
+  repostCount,
+  big,
+  onRepost,
+  onQuote,
+}: Props) => {
+  const store = useStores()
+  const theme = useTheme()
+
+  const defaultControlColor = React.useMemo(
+    () => ({
+      color: theme.palette.default.postCtrl,
+    }),
+    [theme],
+  )
+
+  const onPressToggleRepostWrapper = useCallback(() => {
+    store.shell.openModal({
+      name: 'repost',
+      onRepost: onRepost,
+      onQuote: onQuote,
+      isReposted,
+    })
+  }, [onRepost, onQuote, isReposted, store.shell])
+
+  return (
+    <TouchableOpacity
+      testID="repostBtn"
+      hitSlop={HITSLOP}
+      onPress={onPressToggleRepostWrapper}
+      style={styles.control}
+      accessibilityRole="button"
+      accessibilityLabel={isReposted ? 'Undo repost' : 'Repost'}
+      accessibilityHint={
+        isReposted
+          ? `Remove your repost of the post`
+          : `Repost or quote post the post`
+      }>
+      <RepostIcon
+        style={
+          isReposted
+            ? (styles.reposted as StyleProp<ViewStyle>)
+            : defaultControlColor
+        }
+        strokeWidth={2.4}
+        size={big ? 24 : 20}
+      />
+      {typeof repostCount !== 'undefined' ? (
+        <Text
+          testID="repostCount"
+          style={
+            isReposted
+              ? [s.bold, s.green3, s.f15, s.ml5]
+              : [defaultControlColor, s.f15, s.ml5]
+          }>
+          {repostCount}
+        </Text>
+      ) : undefined}
+    </TouchableOpacity>
+  )
+}
+
+const styles = StyleSheet.create({
+  control: {
+    flexDirection: 'row',
+    alignItems: 'center',
+    padding: 5,
+    margin: -5,
+  },
+  reposted: {
+    color: colors.green3,
+  },
+  repostCount: {
+    color: 'currentColor',
+  },
+})