Add video filters to common video pages

client/src/app/helpers/utils/object.ts

@@ -0,0 +1,47 @@
+function immutableAssign <A, B> (target: A, source: B) {
+  return Object.assign({}, target, source)
+}
+
+function removeElementFromArray <T> (arr: T[], elem: T) {
+  const index = arr.indexOf(elem)
+  if (index !== -1) arr.splice(index, 1)
+}
+
+function sortBy (obj: any[], key1: string, key2?: string) {
+  return obj.sort((a, b) => {
+    const elem1 = key2 ? a[key1][key2] : a[key1]
+    const elem2 = key2 ? b[key1][key2] : b[key1]
+
+    if (elem1 < elem2) return -1
+    if (elem1 === elem2) return 0
+    return 1
+  })
+}
+
+function intoArray (value: any) {
+  if (!value) return undefined
+  if (Array.isArray(value)) return value
+
+  if (typeof value === 'string') return value.split(',')
+
+  return [ value ]
+}
+
+function toBoolean (value: any) {
+  if (!value) return undefined
+
+  if (typeof value === 'boolean') return value
+
+  if (value === 'true') return true
+  if (value === 'false') return false
+
+  return undefined
+}
+
+export {
+  sortBy,
+  immutableAssign,
+  removeElementFromArray,
+  intoArray,
+  toBoolean
+}