3 files changed, 205 insertions, 0 deletions
diff --git a/src/yewtube-urls/LICENSES/CC0-1.0.txt b/src/yewtube-urls/LICENSES/CC0-1.0.txt
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--- /dev/null
+++ b/src/yewtube-urls/LICENSES/CC0-1.0.txt
@@ -0,0 +1,121 @@
+Creative Commons Legal Code
+
+CC0 1.0 Universal
+
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+    LEGAL SERVICES. DISTRIBUTION OF THIS DOCUMENT DOES NOT CREATE AN
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+    PROVIDED HEREUNDER, AND DISCLAIMS LIABILITY FOR DAMAGES RESULTING FROM
+    THE USE OF THIS DOCUMENT OR THE INFORMATION OR WORKS PROVIDED
+    HEREUNDER.
+
+Statement of Purpose
+
+The laws of most jurisdictions throughout the world automatically confer
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+1. Copyright and Related Rights. A Work made available under CC0 may be
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+     protection of databases, and under any national implementation
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+     directive); and
+vii. other similar, equivalent or corresponding rights throughout the
+     world based on applicable law or treaty, and any national
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+
+2. Waiver. To the greatest extent permitted by, but not in contravention
+of, applicable law, Affirmer hereby overtly, fully, permanently,
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+Affirmer's Copyright and Related Rights and associated claims and causes
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+equitable action to disrupt the quiet enjoyment of the Work by the public
+as contemplated by Affirmer's express Statement of Purpose.
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+3. Public License Fallback. Should any part of the Waiver for any reason
+be judged legally invalid or ineffective under applicable law, then the
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+Related Rights in the Work (i) in all territories worldwide, (ii) for the
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+time extensions), (iii) in any current or future medium and for any number
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+applied by Affirmer to the Work. Should any part of the License for any
+reason be judged legally invalid or ineffective under applicable law, such
+partial invalidity or ineffectiveness shall not invalidate the remainder
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+4. Limitations and Disclaimers.
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+ c. Affirmer disclaims responsibility for clearing rights of other persons
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diff --git a/src/yewtube-urls/index.json b/src/yewtube-urls/index.json
new file mode 100644
index 0000000..df7a63f
--- /dev/null
+++ b/src/yewtube-urls/index.json
@@ -0,0 +1,26 @@
+// SPDX-License-Identifier: CC0-1.0
+
+// Copyright (C) 2022 Wojtek Kosior <koszko@koszko.org>
+// Available under the terms of Creative Commons Zero v1.0 Universal.
+
+{
+    "$schema": "https://hydrilla.koszko.org/schemas/package_source-2.schema.json",
+    "source_name": "yewtube-urls",
+    "copyright":  [
+	{"file": "report.spdx"},
+	{"file": "LICENSES/CC0-1.0.txt"}
+    ],
+    "upstream_url": "https://git.koszko.org/hydrilla-fixes-bundle/tree/src/yewtube-urls",
+    "definitions": [{
+	"type":         "resource",
+	"identifier":   "yewtube-urls",
+	"long_name":    "youtube.com -> yewtu.be URL converter",
+	"uuid":         "a75cfb40-ec7e-4a49-be99-2115617ff02f",
+	"version":      [2022, 2, 18],
+	"revision":     2,
+	"description":  "Convert YouTube video URLs to their corresponding yewtu.be URLs.",
+	"dependencies": [],
+	"scripts":      [{"file": "yewtube_urls.js"}]
+    }],
+    "reuse_generate_spdx_report": true
+}
diff --git a/src/yewtube-urls/yewtube_urls.js b/src/yewtube-urls/yewtube_urls.js
new file mode 100644
index 0000000..9eca21f
--- /dev/null
+++ b/src/yewtube-urls/yewtube_urls.js
@@ -0,0 +1,58 @@
+/**
+ * SPDX-License-Identifier: CC0-1.0
+ *
+ * Library to convert youtube.com URLs to yewtu.be URLs.
+ *
+ * Copyright (C) 2021 Wojtek Kosior <koszko@koszko.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the CC0 1.0 Universal License as published by
+ * the Creative Commons Corporation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * CC0 1.0 Universal License for more details.
+ */
+
+function decode_query_options(url)
+{
+    const query_options = {};
+    const match = /^[^?]*\?(.*)/.exec(url);
+    if (!match)
+	return query_options;
+
+    for (const opt of match[1].split("&")) {
+	const [key, val] =
+	      /^([^=]*)=?(.*)/.exec(opt).splice(1, 2).map(decodeURIComponent);
+	query_options[key] = val;
+    }
+
+    return query_options;
+}
+
+function encode_query_options(query_options)
+{
+    return Object.entries(query_options)
+	.map(ar => ar.map(encodeURIComponent).join("=")).join("&");
+}
+
+function make_yewtube_url(youtube_url)
+{
+    const query_options = decode_query_options(youtube_url);
+
+    let endpoint = "";
+
+    const match = /^(?:(?:https?:)?\/\/)?[^/]*\/([^?]*)/.exec(youtube_url);
+    if (match)
+	endpoint = match[1];
+
+    if (/^embed\//.test(query_options.v))
+	endpoint = query_options.v;
+
+    if (/^embed\/.+/.test(endpoint))
+	delete query_options.v;
+
+    const encoded_options = encode_query_options(query_options);
+    return `https://yewtu.be/${endpoint}?${encoded_options}`;
+}