From f33fcc878ba9d7952a99742cc2ed30a1fd61bb67 Mon Sep 17 00:00:00 2001
From: Peter Hall <33176108+IamPete1@users.noreply.github.com>
Date: Mon, 12 Feb 2024 23:14:23 +0000
Subject: [PATCH] generator: add javascript "lite"

---
 generator/mavgen.py                 |  5 +++-
 generator/mavgen_javascript_lite.py | 44 +++++++++++++++++++++++++++++
 2 files changed, 48 insertions(+), 1 deletion(-)
 create mode 100644 generator/mavgen_javascript_lite.py

diff --git a/generator/mavgen.py b/generator/mavgen.py
index c962f48b6..ff9ea8aae 100755
--- a/generator/mavgen.py
+++ b/generator/mavgen.py
@@ -47,7 +47,7 @@
 
 # List the supported languages. This is done globally because it's used by the GUI wrapper too
 # Right now, 'JavaScript' ~= 'JavaScript_Stable', in the future it may be made equivalent to 'JavaScript_NextGen'
-supportedLanguages = ["Ada", "C", "CS", "JavaScript", "JavaScript_Stable","JavaScript_NextGen", "TypeScript", "Python2", "Python3", "Python", "Lua", "WLua", "ObjC", "Swift", "Java", "C++11"]
+supportedLanguages = ["Ada", "C", "CS", "JavaScript", "JavaScript_Stable","JavaScript_NextGen", "JavaScript_lite", "TypeScript", "Python2", "Python3", "Python", "Lua", "WLua", "ObjC", "Swift", "Java", "C++11"]
 
 
 def mavgen(opts, args):
@@ -303,6 +303,9 @@ def mavgen_validate(xmlfile):
         else:
             from . import mavgen_ada
             mavgen_ada.generate(opts.output, xml)
+    elif opts.language == 'javascript_lite':
+        from . import mavgen_javascript_lite
+        mavgen_javascript_lite.generate(opts.output, xml)
     else:
         print("Unsupported language %s" % opts.language)
 
diff --git a/generator/mavgen_javascript_lite.py b/generator/mavgen_javascript_lite.py
new file mode 100644
index 000000000..c8b0b611b
--- /dev/null
+++ b/generator/mavgen_javascript_lite.py
@@ -0,0 +1,44 @@
+#!/usr/bin/env python
+'''
+parse a MAVLink protocol XML file and generate a javascript file to get CRC extra and name from message ID and MAV_COMPONENT enum. No payload fields are considered.
+'''
+from __future__ import print_function
+
+from builtins import range
+
+import os
+
+def generate(basename, xml):
+    msgs = []
+    enums = []
+    filelist = []
+    for x in xml:
+        msgs.extend(x.message)
+        enums.extend(x.enum)
+        filelist.append(os.path.basename(x.filename))
+
+    print("Generating %s/mavlink_msgs.js" % basename)
+    # create the output directory if needed
+    if not os.path.exists(basename):
+        os.makedirs(basename)
+    outf = open("%s/mavlink_msgs.js" % basename, "w")
+
+    outf.write("// Auto generated MAVLink parsing script\n\nmavlink_msgs = []\n")
+
+    for msg in msgs:
+        outf.write("mavlink_msgs[%i] = { name: \"%s\", CRC: %i }\n" % (msg.id, msg.name, msg.crc_extra))
+    outf.write("\n")
+
+    for enum in enums:
+        if enum.name != "MAV_COMPONENT":
+            # Only need component ID
+            continue
+        outf.write("%s = []\n" % enum.name)
+        for entry in enum.entry:
+            outf.write("%s[%i] = \"%s\"\n" % (enum.name, entry.value, entry.name))
+        outf.write("\n")
+
+
+    outf.close()
+    print("Generated %s OK" % basename)
+