feat: add snjs package

packages/snjs/lib/Services/Sync/Utils.ts

@@ -0,0 +1,43 @@
+import { ContentType } from '@standardnotes/common'
+import { FullyFormedPayloadInterface } from '@standardnotes/models'
+
+/**
+ * Sorts payloads according by most recently modified first, according to the priority,
+ * whereby the earlier a content_type appears in the priorityList,
+ * the earlier it will appear in the resulting sorted array.
+ */
+export function SortPayloadsByRecentAndContentPriority(
+  payloads: FullyFormedPayloadInterface[],
+  priorityList: ContentType[],
+): FullyFormedPayloadInterface[] {
+  return payloads.sort((a, b) => {
+    const dateResult = new Date(b.serverUpdatedAt).getTime() - new Date(a.serverUpdatedAt).getTime()
+
+    let aPriority = 0
+    let bPriority = 0
+
+    if (priorityList) {
+      aPriority = priorityList.indexOf(a.content_type)
+      bPriority = priorityList.indexOf(b.content_type)
+
+      if (aPriority === -1) {
+        /** Not found in list, not prioritized. Set it to max value */
+        aPriority = priorityList.length
+      }
+      if (bPriority === -1) {
+        /** Not found in list, not prioritized. Set it to max value */
+        bPriority = priorityList.length
+      }
+    }
+
+    if (aPriority === bPriority) {
+      return dateResult
+    }
+
+    if (aPriority < bPriority) {
+      return -1
+    } else {
+      return 1
+    }
+  })
+}