rewrite links to local files

The markdown we create for links to local files looks like this:
```
[Check this out!](subdir/file.md?fileid=123)
```

Turn this into a link like this
```
<a href="?dir=/current&openfile=123&relPath=subdir/file.md">
  Check this out!
</a>
```

The `relPath` part of the url is needed
to convert it back to the original markdown.

Includes a test.

Next steps:
* open links to local files in same tab.
* change dir param according to relative Path.

Signed-off-by: Azul <azul@riseup.net>

1 files changed, 88 insertions, 0 deletions

diff --git a/src/tests/helpers/links.spec.js b/src/tests/helpers/links.spec.js
new file mode 100644
index 000000000..9317e320c
--- /dev/null
+++ b/src/tests/helpers/links.spec.js
@@ -0,0 +1,88 @@
+import { domHref, parseHref } from '../../helpers/links'
+
+global.OC = {
+	Util: {
+		History: {
+			parseUrlQuery: () => ({
+				dir: '/Wiki',
+			}),
+		},
+	},
+}
+
+describe('Preparing href attributes for the DOM', () => {
+
+	test('leave empty hrefs alone', () => {
+		expect(domHref({attrs: {href: ''}})).toBe('')
+	})
+
+	test('leave undefined hrefs alone', () => {
+		expect(domHref({attrs: {}})).toBe(undefined)
+	})
+
+	test('full url', () => {
+		expect(domHref({attrs: {href: 'https://otherdomain.tld'}}))
+			.toBe('https://otherdomain.tld')
+	})
+
+	test('other protocol', () => {
+		expect(domHref({attrs: {href: 'mailTo:test@mail.example'}}))
+			.toBe('mailTo:test@mail.example')
+	})
+
+	test('relative link with fileid', () => {
+		expect(domHref({attrs: {href: 'otherfile?fileId=123'}}))
+			.toBe('?dir=/Wiki&openfile=123&relPath=otherfile')
+	})
+
+})
+
+describe('Extracting short urls from the DOM', () => {
+
+	const domStub = (href) => ({
+		getAttribute() {
+			return href
+		},
+	})
+
+	test('leave empty hrefs alone', () => {
+		expect(parseHref(domStub(''))).toBe('')
+	})
+
+	test('leave undefined hrefs alone', () => {
+		expect(parseHref(domStub())).toBe(undefined)
+	})
+
+	test('relative link with fileid', () => {
+		expect(parseHref(domStub('?dir=/Wiki&openfile=123&relPath=otherfile')))
+			.toBe('otherfile?fileId=123')
+	})
+
+})
+
+describe('Inserting hrefs into the dom and extracting them again', () => {
+
+	function insertAndExtract(attrs) {
+		const node = {attrs}
+		const dom = {
+			getAttribute() {
+				return domHref(node)
+			},
+		}
+		return parseHref(dom)
+	}
+
+	test('leave empty hrefs alone', () => {
+		expect(insertAndExtract({href: ''})).toBe('')
+	})
+
+	test('leave undefined hrefs alone', () => {
+		expect(insertAndExtract({})).toBe(undefined)
+	})
+
+	test('default relative link format is unchanged', () => {
+		expect(insertAndExtract({href: 'otherfile?fileId=123'}))
+			.toBe('otherfile?fileId=123')
+	})
+
+})