Initial Move from Azure DevOps to GitHub

src/Explorer/Notebook/NotebookUtil.ts

@@ -0,0 +1,75 @@
+import path from "path";
+import { ImmutableNotebook } from "@nteract/commutable";
+import { NotebookContentItem, NotebookContentItemType } from "./NotebookContentItem";
+import { StringUtils } from "../../Utils/StringUtils";
+
+// Must match rx-jupyter' FileType
+export type FileType = "directory" | "file" | "notebook";
+// Utilities for notebooks
+export class NotebookUtil {
+  /**
+   * It's a notebook file if the filename ends with .ipynb.
+   */
+  public static isNotebookFile(notebookPath: string): boolean {
+    return StringUtils.endsWith(notebookPath, ".ipynb");
+  }
+
+  /**
+   * Note: this does not connect the item to a parent in a tree.
+   * @param name
+   * @param path
+   */
+  public static createNotebookContentItem(name: string, path: string, type: FileType): NotebookContentItem {
+    return {
+      name,
+      path,
+      type: NotebookUtil.getType(type),
+      timestamp: NotebookUtil.getCurrentTimestamp()
+    };
+  }
+
+  /**
+   * Convert rx-jupyter type to our type
+   * @param type
+   */
+  public static getType(type: FileType): NotebookContentItemType {
+    switch (type) {
+      case "directory":
+        return NotebookContentItemType.Directory;
+      case "notebook":
+        return NotebookContentItemType.Notebook;
+      case "file":
+        return NotebookContentItemType.File;
+      default:
+        throw new Error(`Unknown file type: ${type}`);
+    }
+  }
+
+  public static getCurrentTimestamp(): number {
+    return new Date().getTime();
+  }
+
+  /**
+   * Override from kernel-lifecycle.ts to improve kernel selection:
+   * Only return the kernel name persisted in the notebook
+   *
+   * @param filepath
+   * @param notebook
+   */
+  public static extractNewKernel(filepath: string | null, notebook: ImmutableNotebook) {
+    const cwd = (filepath && path.dirname(filepath)) || "/";
+
+    const kernelSpecName =
+      notebook.getIn(["metadata", "kernelspec", "name"]) || notebook.getIn(["metadata", "language_info", "name"]);
+
+    return {
+      cwd,
+      kernelSpecName
+    };
+  }
+
+  public static getContentName(uri: string): string | undefined {
+    const parts = uri.split("/");
+    return parts.pop() || parts.pop(); // handle potential trailing slash
+  }
+}