annotation form for curtain events. refactor utilities

1 files changed, 26 insertions, 0 deletions

diff --git a/animism-align/frontend/app/views/annotation/annotation.util.js b/animism-align/frontend/app/views/annotation/annotation.util.js
new file mode 100644
index 0000000..82edd9a
--- /dev/null
+++ b/animism-align/frontend/app/views/annotation/annotation.util.js
@@ -0,0 +1,26 @@
+import { timestampToSeconds } from 'app/utils'
+
+export const thumbnailURL = data => {
+  switch (data.type) {
+    case 'video': return data.settings.video.thumbnail_url
+    case 'image': return data.settings.thumbnail.url
+    default:      return null
+  }
+}
+
+export const curtainTimings = annotation => {
+  const fadeInDurationInSeconds = timestampToSeconds(annotation.settings.fade_in_duration || '0')
+  const fadeOutDurationInSeconds = timestampToSeconds(annotation.settings.fade_out_duration || '0')
+  const durationInSeconds = timestampToSeconds(annotation.settings.duration || '0')
+
+  const start_ts = annotation.start_ts
+  const end_ts = start_ts + durationInSeconds
+  const fade_in_end_ts = start_ts + fadeInDurationInSeconds
+  const fade_out_start_ts = end_ts - fadeOutDurationInSeconds
+
+  return {
+    fadeInDurationInSeconds, fadeOutDurationInSeconds, durationInSeconds,
+    start_ts, end_ts, fade_in_end_ts, fade_out_start_ts,
+  }
+}
+