def eval(self, orig_node, code_string, fake_tree):
"""
Evaluates a string by parsing it to its AST representation.
Inserts the AST expression as fake_node and returns the path
reference to the inserted fake_node.
"""
line = orig_node.line()
column = int(orig_node.column()) + 1
# add whitespace as padding to fixup the column location of the
# resulting tokens.
from storyscript.Story import Story
story = Story(" " * column + code_string, features=self.features)
story.parse(self.parser, allow_single_quotes=True)
new_node = story.tree
new_node = new_node.block
orig_node.expect(new_node, "string_templates_no_assignment")
# go to the actual node -> jump into block.rules or block.service
for i in range(2):
orig_node.expect(
len(new_node.children) == 1, "string_templates_no_assignment"
)
new_node = new_node.children[0]
# for now only expressions or service_blocks are allowed inside string
# templates
if (
new_node.data == "service_block"
and new_node.service_fragment is None
):
# it was a plain-old path initially
name = Token("NAME", code_string.strip(), line=line, column=column)
name.end_column = int(orig_node.end_column()) - 1
return Tree("path", [name])
if new_node.data == "absolute_expression":
new_node = new_node.children[0]
else:
orig_node.expect(
new_node.data == "service", "string_templates_no_assignment"
)
# the new assignment should be inserted at the top of the current block
return fake_tree.add_assignment(new_node, original_line=line)
def format(self, ws, doc):
last_line = doc.nr_lines() - 1
story = Story(doc.text(), features=None)
new_story = story.parse(parser=None).format()
resp = [{
"range": {
"start": {
"line": 0,
"character": 0
},
"end": {
"line": last_line,
"character": len(doc.line(last_line)),
},
},
"newText": new_story,
}]
return resp
