Add emitter api and test

api/__init__.py

@@ -47,4 +47,6 @@ from .s11_patterns import get_pattern_schema, get_pattern, set_pattern
 
 from .s12_curves import get_curve_schema, get_curve, set_curve
 
+from .s16_emitters import get_emitter_schema, get_emitter, set_emitter
+
 from .s24_coordinates import get_node_coord

api/command.py

@@ -9,6 +9,7 @@ from .s9_demands import *
 from .s10_status import *
 from .s11_patterns import *
 from .s12_curves import *
+from .s16_emitters import *
 
 
 def execute_add_command(name: str, cs: ChangeSet) -> ChangeSet:
@@ -55,6 +56,8 @@ def execute_update_command(name: str, cs: ChangeSet) -> ChangeSet:
         return set_pattern(name, cs)
     elif type == CURVE:
         return set_curve(name, cs)
+    elif type == 'emitter':
+        return set_emitter(name, cs)
 
     return ChangeSet()
 

api/s16_emitters.py

@@ -0,0 +1,56 @@
+from .operation import *
+from .s0_base import *
+
+
+def get_emitter_schema(name: str) -> dict[str, dict[str, Any]]:
+    return { 'junction'    : {'type': 'str'   , 'optional': False , 'readonly': True },
+             'coefficient' : {'type': 'float' , 'optional': True ,  'readonly': False} }
+
+
+def get_emitter(name: str, junction: str) -> dict[str, Any]:
+    e = try_read(name, f"select * from emitters where junction = '{junction}'")
+    if e == None:
+        return { 'junction': junction, 'coefficient': None }
+    d = {}
+    d['junction'] = str(e['junction'])
+    d['coefficient'] = float(e['coefficient']) if e['coefficient'] != None else None
+    return d
+
+
+class Emitter(object):
+    def __init__(self, input: dict[str, Any]) -> None:
+        self.type = 'emitter'
+        self.junction = str(input['junction'])
+        self.coefficient = float(input['coefficient']) if 'coefficient' in input and input['coefficient'] != None else None
+
+        self.f_type = f"'{self.type}'"
+        self.f_junction = f"'{self.junction}'"
+        self.f_coefficient = self.coefficient if self.coefficient != None else 'null'
+
+    def as_dict(self) -> dict[str, Any]:
+        return { 'type': self.type, 'junction': self.junction, 'coefficient': self.coefficient }
+
+
+def set_emitter(name: str, cs: ChangeSet) -> ChangeSet:
+    old = Emitter(get_emitter(name, cs.operations[0]['junction']))
+    raw_new = get_emitter(name, cs.operations[0]['junction'])
+
+    new_dict = cs.operations[0]
+    schema = get_emitter_schema(name)
+    for key, value in schema.items():
+        if key in new_dict and not value['readonly']:
+            raw_new[key] = new_dict[key]
+    new = Emitter(raw_new)
+
+    redo_sql = f"delete from emitters where junction = {new.f_junction};"
+    if new.coefficient != None:
+        redo_sql += f"\ninsert into emitters (junction, coefficient) values ({new.f_junction}, {new.f_coefficient});"
+
+    undo_sql = f"delete from emitters where junction = {old.f_junction};"
+    if old.coefficient != None:
+        undo_sql += f"\ninsert into emitters (junction, coefficient) values ({old.f_junction}, {old.f_coefficient});"
+
+    redo_cs = g_update_prefix | new.as_dict()
+    undo_cs = g_update_prefix | old.as_dict()
+
+    return execute_command(name, redo_sql, undo_sql, redo_cs, undo_cs)