From 6a9e041978f82017b74d1ce9d47296f1ebaaa0ff Mon Sep 17 00:00:00 2001
From: Daniel Friesel <daniel.friesel@uos.de>
Date: Wed, 8 Jun 2022 14:15:47 +0200
Subject: FOL: Add JSON export

---
 lib/functions.py  | 30 ++++++++++++++++++++++++++----
 lib/parameters.py |  2 +-
 2 files changed, 27 insertions(+), 5 deletions(-)

diff --git a/lib/functions.py b/lib/functions.py
index cd3c7d1..41885c7 100644
--- a/lib/functions.py
+++ b/lib/functions.py
@@ -635,12 +635,21 @@ class FOLFunction(ModelFunction):
                     num_vars += 1
         else:
             num_vars = fit_parameters.shape[0]
-            funbuf = "lambda reg_param, model_param: 0"
+            funbuf = "0"
+            rawbuf = "0"
             for i in range(num_vars):
-                funbuf += f" + reg_param[{i}] * model_param[{i}]"
+                rawbuf += f" + reg_param[{i}] * model_param[{i}]"
+            i = 0
+            for j, param_name in enumerate(self.parameter_names):
+                if ignore_index[j]:
+                    continue
+                else:
+                    funbuf += f" + regression_arg({i}) * parameter({param_name})"
+                    i += 1
 
-        self._function_str = self.model_function = funbuf
-        self._function = eval(funbuf)
+        self.model_function = funbuf
+        self._function_str = "lambda reg_param, model_param:" + rawbuf
+        self._function = eval(self._function_str)
 
         error_function = lambda P, X, y: self._function(P, X) - y
         self.model_args = list(np.ones((num_vars)))
@@ -697,6 +706,19 @@ class FOLFunction(ModelFunction):
             )
             return self.value
 
+    def to_json(self, **kwargs):
+        ret = super().to_json(**kwargs)
+        ret.update(
+            {
+                "type": "analytic",
+                "functionStr": self.model_function,
+                "argCount": self._num_args,
+                "parameterNames": self.parameter_names,
+                "regressionModel": list(self.model_args),
+            }
+        )
+        return ret
+
 
 class AnalyticFunction(ModelFunction):
     """
diff --git a/lib/parameters.py b/lib/parameters.py
index a636b52..207b8d8 100644
--- a/lib/parameters.py
+++ b/lib/parameters.py
@@ -606,7 +606,7 @@ class ModelAttribute:
             "argCount": self.arg_count,
             "modelFunction": self.model_function.to_json(**kwargs),
         }
-        if type(self.model_function) == df.CARTFunction:
+        if type(self.model_function) in (df.CARTFunction, df.FOLFunction):
             feature_names = self.param_names
             feature_names += list(
                 map(
-- 
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