1 files changed, 76 insertions, 0 deletions
diff --git a/src/services/api/graphql/utils/util.py b/src/services/api/graphql/utils/util.py
new file mode 100644
index 000000000..073126853
--- /dev/null
+++ b/src/services/api/graphql/utils/util.py
@@ -0,0 +1,76 @@
+# Copyright 2022 VyOS maintainers and contributors <maintainers@vyos.io>
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library 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 GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this library.  If not, see <http://www.gnu.org/licenses/>.
+
+import os
+import re
+import importlib.util
+
+from vyos.defaults import directories
+
+def load_as_module(name: str, path: str):
+    spec = importlib.util.spec_from_file_location(name, path)
+    mod = importlib.util.module_from_spec(spec)
+    spec.loader.exec_module(mod)
+    return mod
+
+def load_op_mode_as_module(name: str):
+    path = os.path.join(directories['op_mode'], name)
+    name = os.path.splitext(name)[0].replace('-', '_')
+    return load_as_module(name, path)
+
+def is_op_mode_function_name(name):
+    if re.match(r"^(show|clear|reset|restart)", name):
+        return True
+    return False
+
+def is_show_function_name(name):
+    if re.match(r"^show", name):
+        return True
+    return False
+
+def _nth_split(delim: str, n: int, s: str):
+    groups = s.split(delim)
+    l = len(groups)
+    if n > l-1 or n < 1:
+        return (s, '')
+    return (delim.join(groups[:n]), delim.join(groups[n:]))
+
+def _nth_rsplit(delim: str, n: int, s: str):
+    groups = s.split(delim)
+    l = len(groups)
+    if n > l-1 or n < 1:
+        return (s, '')
+    return (delim.join(groups[:l-n]), delim.join(groups[l-n:]))
+
+# Since we have mangled possible hyphens in the file name while constructing
+# the snake case of the query/mutation name, we will need to recover the
+# file name by searching with mangling:
+def _filter_on_mangled(test):
+    def func(elem):
+        mangle = os.path.splitext(elem)[0].replace('-', '_')
+        return test == mangle
+    return func
+
+# Find longest name in concatenated string that matches the basename of an
+# op-mode script. Should one prefer to concatenate in the reverse order
+# (script_name + '_' + function_name), use _nth_rsplit.
+def split_compound_op_mode_name(name: str, files: list):
+    for i in range(1, name.count('_') + 1):
+        pair = _nth_split('_', i, name)
+        f = list(filter(_filter_on_mangled(pair[1]), files))
+        if f:
+            pair = (pair[0], f[0])
+            return pair
+    return (name, '')