1 files changed, 105 insertions, 0 deletions
diff --git a/grc/blocks/variable_struct.block.yml.py b/grc/blocks/variable_struct.block.yml.py
new file mode 100644
index 0000000000..19b29982e7
--- /dev/null
+++ b/grc/blocks/variable_struct.block.yml.py
@@ -0,0 +1,105 @@
+#!/usr/bin/env python
+
+MAX_NUM_FIELDS = 20
+
+HEADER = """\
+id: variable_struct
+label: Struct Variable
+
+parameters:
+"""
+
+TEMPLATES = """\
+
+templates:
+    imports: "def struct(data): return type('Struct', (object,), data)()"
+    var_make: |-
+        self.${{id}} = ${{id}} = struct({{
+            % for i in range({0}):
+            <%
+                field = getVar('field' + str(i))
+            %>
+            % if len(str(field)) > 2:
+            ${{field}}: getVar('value' + str(i)),
+            % endif
+            % endfor
+        }})
+    var_value: |-
+        struct({{
+            % for i in range({0}):
+            <%
+                field = getVar('field' + str(i))
+            %>
+            % if len(str(field)) > 2:
+            ${{field}}: getVar('field' + str(i)),
+            % endif
+            % endfor
+        }})
+"""
+
+FIELD0 = """\
+-   id: field0
+    label: Field 0
+    category: Fields
+    dtype: string
+    default: ${field0}
+    hide: part
+"""
+
+FIELDS = """\
+-   id: field{0}
+    label: Field {0}
+    category: Fields
+    dtype: string
+    hide: part
+"""
+
+VALUES = """\
+-   id: value{0}
+    label: ${{field{0}}}
+    dtype: raw
+    default: '0'
+    hide: ${{ 'none' if field{0} else 'all' }}
+"""
+
+ASSERTS = """\
+- ${{ (str(field{0}) or "a")[0].isalpha() }}
+- ${{ (str(field{0}) or "a").isalnum() }}
+"""
+
+FOOTER = """\
+
+documentation: |-
+    This is a simple struct/record like variable.
+
+    Attribute/field names can be specified in the tab 'Fields'.
+    For each non-empty field a parameter with type raw is shown.
+    Value access via the dot operator, e.g. "variable_struct_0.field0"
+
+file_format: 1
+"""
+
+
+def make_yml(num_fields):
+    return ''.join((
+        HEADER.format(num_fields),
+        FIELD0, ''.join(FIELDS.format(i) for i in range(1, num_fields)),
+        ''.join(VALUES.format(i) for i in range(num_fields)),
+        'value: ${value}\n\nasserts:\n',
+        ''.join(ASSERTS.format(i) for i in range(num_fields)),
+        ''.join(TEMPLATES.format(num_fields)),
+        FOOTER
+    ))
+
+
+if __name__ == '__main__':
+    import sys
+    try:
+        filename = sys.argv[1]
+    except IndexError:
+        filename = __file__[:-3]
+
+    data = make_yml(MAX_NUM_FIELDS)
+
+    with open(filename, 'wb') as fp:
+        fp.write(data.encode())