Move to expo and react-navigation (#288)

* WIP - adding expo

* WIP - adding expo 2

* Fix tsc

* Finish adding expo

* Disable the 'require cycle' warning

* Tweak plist

* Modify some dependency versions to make expo happy

* Fix icon fill

* Get Web compiling for expo

* 1.7

* Switch to react-navigation in expo2 (#287)

* WIP Switch to react-navigation

* WIP Switch to react-navigation 2

* WIP Switch to react-navigation 3

* Convert all screens to react navigation

* Update BottomBar for react navigation

* Update mobile menu to be react-native drawer

* Fixes to drawer and bottombar

* Factor out some helpers

* Replace the navigation model with react-navigation

* Restructure the shell folder and fix the header positioning

* Restore the error boundary

* Fix tsc

* Implement not-found page

* Remove react-native-gesture-handler (no longer used)

* Handle notifee card presses

* Handle all navigations from the state layer

* Fix drawer behaviors

* Fix two linking issues

* Switch to our react-native-progress fork to fix an svg rendering issue

* Get Web working with react-navigation

* Refactor routes and navigation for a bit more clarity

* Remove dead code

* Rework Web shell to left/right nav to make this easier

* Fix ViewHeader for desktop web

* Hide profileheader back btn on desktop web

* Move the compose button to the left nav

* Implement reply prompt in threads for desktop web

* Composer refactors

* Factor out all platform-specific text input behaviors from the composer

* Small fix

* Update the web build to use tiptap for the composer

* Tune up the mention autocomplete dropdown

* Simplify the default avatar and banner

* Fixes to link cards in web composer

* Fix dropdowns on web

* Tweak load latest on desktop

* Add web beta message and feedback link

* Fix up links in desktop web

1 files changed, 7 insertions, 0 deletions

diff --git a/src/lib/media/util.ts b/src/lib/media/util.ts
new file mode 100644
index 000000000..a27c71d82
--- /dev/null
+++ b/src/lib/media/util.ts
@@ -0,0 +1,7 @@
+export function extractDataUriMime(uri: string): string {
+  return uri.substring(uri.indexOf(':') + 1, uri.indexOf(';'))
+}
+
+export function getDataUriSize(uri: string): number {
+  return Math.round((uri.length * 3) / 4) // very rough estimate
+}