feat: add export command

Author: JamesCamel

src/commands/export.ts

@@ -0,0 +1,37 @@
+import {Flags} from '@oclif/core'
+
+import HackMDCommand from '../command'
+import {noteId} from '../flags'
+
+export default class Export extends HackMDCommand {
+  static description = 'Export note content'
+
+  static examples = [
+    `$ hackmd-cli export --noteId=kNFWV5E-Qz-QP7u6XnNvyQ
+# A note to be exported
+    `,
+  ]
+
+  static flags = {
+    help: Flags.help({char: 'h'}),
+    noteId: noteId()
+  }
+
+  async run() {
+    const {flags} = await this.parse(Export)
+    const {noteId} = flags
+
+    if (!noteId) {
+      this.error('Flag noteId could not be empty')
+    }
+
+    try {
+      const APIClient = await this.getAPIClient()
+      const note = await APIClient.getNote(noteId)
+      this.log(note.content)
+    } catch (e) {
+      this.log('Export note content failed')
+      this.error(e as Error)
+    }
+  }
+}