- return Array.isArray(activity['@context']) &&
- activity.type === type &&
- validator.isURL(activity.id) &&
- validator.isURL(activity.actor) &&
- Array.isArray(activity.to) &&
- activity.to.every(t => validator.isURL(t))
+ return activity.type === type &&
+ isActivityPubUrlValid(activity.id) &&
+ isObjectValid(activity.actor) &&
+ isUrlCollectionValid(activity.to) &&
+ isUrlCollectionValid(activity.cc)
+}
+
+function isUrlCollectionValid (collection: any) {
+ return collection === undefined ||
+ (Array.isArray(collection) && collection.every(t => isActivityPubUrlValid(t)))
+}
+
+function isObjectValid (object: any) {
+ return exists(object) &&
+ (
+ isActivityPubUrlValid(object) || isActivityPubUrlValid(object.id)
+ )
+}
+
+function setValidAttributedTo (obj: any) {
+ if (Array.isArray(obj.attributedTo) === false) {
+ obj.attributedTo = []
+ return true
+ }
+
+ obj.attributedTo = obj.attributedTo.filter(a => {
+ return (a.type === 'Group' || a.type === 'Person') && isActivityPubUrlValid(a.id)
+ })
+
+ return true
+}
+
+function isActivityPubVideoDurationValid (value: string) {
+ // https://www.w3.org/TR/activitystreams-vocabulary/#dfn-duration
+ return exists(value) &&
+ typeof value === 'string' &&
+ value.startsWith('PT') &&
+ value.endsWith('S')