iOS almost working

src/screens/Compose/updateText.ts

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+import { Dispatch } from 'react'
+import formatText from './formatText'
+import { ComposeAction, ComposeState } from './utils/types'
+
+const updateText = ({
+  composeState,
+  composeDispatch,
+  newText,
+  type
+}: {
+  composeState: ComposeState
+  composeDispatch: Dispatch<ComposeAction>
+  newText: string
+  type: 'emoji' | 'suggestion'
+}) => {
+  const textInput = composeState.textInputFocus.current
+  if (composeState[textInput].raw.length) {
+    const contentFront = composeState[textInput].raw.slice(
+      0,
+      composeState[textInput].selection.start
+    )
+    const contentRear = composeState[textInput].raw.slice(
+      composeState[textInput].selection.end
+    )
+
+    const whiteSpaceFront = /\s/g.test(contentFront.slice(-1))
+    const whiteSpaceRear = /\s/g.test(contentRear.slice(-1))
+
+    const newTextWithSpace = `${
+      whiteSpaceFront || type === 'suggestion' ? '' : ' '
+    }${newText}${whiteSpaceRear ? '' : ' '}`
+
+    formatText({
+      textInput,
+      composeDispatch,
+      content: [contentFront, newTextWithSpace, contentRear].join(''),
+      disableDebounce: true
+    })
+  } else {
+    formatText({
+      textInput,
+      composeDispatch,
+      content: `${newText} `,
+      disableDebounce: true
+    })
+  }
+}
+
+export default updateText