1 files changed, 36 insertions, 0 deletions
diff --git a/src/lib/gif-alt-text.ts b/src/lib/gif-alt-text.ts
new file mode 100644
index 000000000..41738c506
--- /dev/null
+++ b/src/lib/gif-alt-text.ts
@@ -0,0 +1,36 @@
+// Kind of a hack. We needed some way to distinguish these.
+const USER_ALT_PREFIX = 'Alt: '
+const DEFAULT_ALT_PREFIX = 'ALT: '
+
+export function createGIFDescription(
+  tenorDescription: string,
+  preferredAlt: string = '',
+) {
+  preferredAlt = preferredAlt.trim()
+  if (preferredAlt !== '') {
+    return USER_ALT_PREFIX + preferredAlt
+  } else {
+    return DEFAULT_ALT_PREFIX + tenorDescription
+  }
+}
+
+export function parseAltFromGIFDescription(description: string): {
+  isPreferred: boolean
+  alt: string
+} {
+  if (description.startsWith(USER_ALT_PREFIX)) {
+    return {
+      isPreferred: true,
+      alt: description.replace(USER_ALT_PREFIX, ''),
+    }
+  } else if (description.startsWith(DEFAULT_ALT_PREFIX)) {
+    return {
+      isPreferred: false,
+      alt: description.replace(DEFAULT_ALT_PREFIX, ''),
+    }
+  }
+  return {
+    isPreferred: false,
+    alt: description,
+  }
+}