feat: allow changing Node mime type

Signed-off-by: John Molakvoæ (skjnldsv) <skjnldsv@protonmail.com>

Author: skjnldsv

__tests__/files/node.spec.ts

@@ -81,6 +81,49 @@ describe('FileId attribute', () => {
 	})
 })
 
+describe('Mime attribute', () => {
+	test('Mime definition', () => {
+		const file = new File({
+			source: 'https://cloud.domain.com/remote.php/dav/picture.jpg',
+			mime: 'image/jpeg',
+			owner: 'emma',
+		})
+		expect(file.mime).toBe('image/jpeg')
+	})
+
+	test('Default mime', () => {
+		const file = new File({
+			source: 'https://cloud.domain.com/remote.php/dav/picture.jpg',
+			owner: 'emma',
+		})
+		expect(file.mime).toBe('application/octet-stream')
+	})
+
+	test('Changing mime', () => {
+		const file = new File({
+			source: 'https://cloud.domain.com/remote.php/dav/picture.jpg',
+			mime: 'image/jpeg',
+			owner: 'emma',
+		})
+		expect(file.mime).toBe('image/jpeg')
+
+		file.mime = 'image/png'
+		expect(file.mime).toBe('image/png')
+	})
+
+	test('Removing mime', () => {
+		const file = new File({
+			source: 'https://cloud.domain.com/remote.php/dav/picture.jpg',
+			mime: 'image/jpeg',
+			owner: 'emma',
+		})
+		expect(file.mime).toBe('image/jpeg')
+
+		file.mime = undefined
+		expect(file.mime).toBe('application/octet-stream')
+	})
+})
+
 describe('Mtime attribute', () => {
 	test('Mtime definition', () => {
 		const mtime = new Date()

lib/files/node.ts

@@ -59,6 +59,10 @@ export abstract class Node {
 	} as ProxyHandler<Attribute>
 
 	constructor(data: NodeData, davService?: RegExp) {
+		if (!data.mime) {
+			data.mime = 'application/octet-stream'
+		}
+
 		// Validate data
 		validateData(data, davService || this._knownDavService)
 
@@ -167,10 +171,23 @@ export abstract class Node {
 
 	/**
 	 * Get the file mime
-	 * There is no setter as the mime is not meant to be changed
 	 */
-	get mime(): string|undefined {
-		return this._data.mime
+	get mime(): string {
+		return this._data.mime || 'application/octet-stream'
+	}
+
+	/**
+	 * Set the file mime
+	 * Removing the mime type will set it to `application/octet-stream`
+	 */
+	set mime(mime: string|undefined) {
+		if (mime === undefined) {
+			mime = 'application/octet-stream'
+		}
+
+		validateData({ ...this._data, mime }, this._knownDavService)
+		this.updateMtime()
+		this._data.mime = mime
 	}
 
 	/**