Add store led script after measurement

cpdctrl/led_script.py

@@ -292,6 +292,8 @@ class LedScript:
             raise InvalidScriptUpdate(f"Cannot update row {idx+1} the script only has {n_rows} rows")
         if not (led >= 0 and led <= 100):
             raise InvalidScriptUpdate(f"Cannot update row {idx+1} because the led value {led}% is not in the range of 0%-100%")
+        if not (dt > 0):
+            raise InvalidScriptUpdate(f"Cannot update row {idx+1} because the dt value '{dt}' <= 0")
         if self.current_dt:
             current_idx = self.get_current_index(self.current_dt)
             if current_idx < idx:
@@ -453,4 +455,38 @@ class LedScript:
         if ignore_errors:
             return states, errors
         return states
+
+    @staticmethod
+    def script_to_file(script: np.ndarray, add_default_header=True, add_extra_header=[]):
+        """Convert a script array to a script text file."""
+        lines = []
+        if add_default_header:
+            lines.append("# Led script file automatically generated at the end of the measurement.")
+            lines.append("# It may contain changes made during the measurement, which means")
+            lines.append("# it might not represented the actual values during the measurement.")
+            lines.append(f"# Duration: {int(script['dtsum'][-1])} s")
+            lines.append(f"# Number of steps: {script['dtsum'].shape[0]}")
+        for line in add_extra_header:
+            if line.startswith("#"):
+                lines.append(line)
+            else:
+                lines.append(f"# {line}")
+        lines.append("# Time LED")
+        for i in range(script['dt'].shape[0]):
+            lines.append(f"{split_seconds_into_units_str(int(script['dt'][i]))} {int(script['led'][i])}")
+        return '\n'.join(lines)
+
+    def to_file(self, add_default_header=True, add_extra_header=[]):
+        """Convert the script to a script text file."""
+        return LedScript.script_to_file(self.script, add_default_header, add_extra_header)
         
+def split_seconds_into_units_str(t: int):
+    """Split seconds into hours, minutes, seconds."""
+    h = t // 3600
+    m = (t % 3600) // 60
+    s = t % 60
+    ret = ""
+    if h != 0: ret += f"{h}h"
+    if m != 0: ret += f"{m}m"
+    if len(ret) == 0 or s != 0: ret += f"{s}s"
+    return ret