Function _assemble_module_json

src/pyspector/ast_cache.py:89–123

Build the Module JSON wrapper around pre-serialized body/type_ignore fragments. Pre-conditions (caller must ensure): Every string in body_parts / type_ignore_parts is valid JSON produced by encode_node(). Values are embedded verbatim — not re-serialized or escaped. Mirrors

(
    body_parts: List[str],
    type_ignore_parts: List[str],
)

def _assemble_module_json(
    body_parts: List[str],
    type_ignore_parts: List[str],
) -> str:
    """
    Build the Module JSON wrapper around pre-serialized body/type_ignore fragments.

    Pre-conditions (caller must ensure):
      Every string in body_parts / type_ignore_parts is valid JSON produced by
      encode_node(). Values are embedded verbatim — not re-serialized or escaped.

    Mirrors AstEncoder's field/children split:
      - non-empty AST-node list → placed under "children"
      - empty list             → placed under "fields" as []
    """
    ch_items: List[str] = []
    fi_items: List[str] = []

    if body_parts:
        ch_items.append('"body": [' + ",".join(body_parts) + "]")
    else:
        fi_items.append('"body": []')

    if type_ignore_parts:
        ch_items.append('"type_ignores": [' + ",".join(type_ignore_parts) + "]")
    else:
        fi_items.append('"type_ignores": []')

    ch_json = "{" + ", ".join(ch_items) + "}"
    fi_json = "{" + ", ".join(fi_items) + "}"
    return (
        '{"node_type": "Module", "lineno": -1, "col_offset": -1, '
        '"children": ' + ch_json + ', '
        '"fields": ' + fi_json + "}"
    )


# ── Incremental JSON construction ────────────────────────────────────────────