use jinja2 to render form templates w/ burnettk

poetry.lock

@@ -2157,7 +2157,7 @@ testing = ["pytest (>=6)", "pytest-checkdocs (>=2.4)", "pytest-flake8", "pytest-
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.9"
-content-hash = "e395233463dec69fa7870815ff342096d7de3ea8899c54eac61ba334ff0b1c73"
+content-hash = "3fe7680583608ddd4ea93082b0c6c250507b53b2211218e00b2df01649bd6c6b"
 
 [metadata.files]
 alabaster = [

pyproject.toml

@@ -49,6 +49,7 @@ types-pytz = "^2022.1.1"
 python-keycloak = "^2.5.0"
 APScheduler = "^3.9.1"
 types-requests = "^2.28.6"
+Jinja2 = "^3.1.2"
 
 
 [tool.poetry.dev-dependencies]

src/spiffworkflow_backend/routes/process_api_blueprint.py

@@ -8,6 +8,7 @@ from typing import Union
 
 import connexion  # type: ignore
 import flask.wrappers
+import jinja2
 from flask import Blueprint
 from flask import g
 from flask import jsonify
@@ -747,6 +748,12 @@ def task_show(process_instance_id: int, task_id: str) -> flask.wrappers.Response
             )
             if ui_form_contents:
                 task.form_ui_schema = ui_form_contents
+    elif task.type == "ManualTask":
+        if task.properties and task.data:
+            if task.properties["instructionsForEndUser"]:
+                task.properties["instructionsForEndUser"] = render_jinja_template(
+                    task.properties["instructionsForEndUser"], task.data
+                )
 
     return make_response(jsonify(task), 200)
 
@@ -919,13 +926,14 @@ def prepare_form_data(
         return ""
 
     file_contents = SpecFileService.get_data(process_model, form_file).decode("utf-8")
+    return render_jinja_template(file_contents, task_data)
 
-    # trade out pieces like "{{variable_name}}" for the corresponding form data value
-    for key, value in task_data.items():
-        if isinstance(value, str) or isinstance(value, int):
-            file_contents = file_contents.replace("{{" + key + "}}", str(value))
 
-    return file_contents
+def render_jinja_template(unprocessed_template: str, data: dict[str, Any]) -> str:
+    """Render_jinja_template."""
+    jinja_environment = jinja2.Environment(autoescape=True)
+    template = jinja_environment.from_string(unprocessed_template)
+    return template.render(**data)
 
 
 def get_spiff_task_from_process_instance(