From 20da69c7a6efc3d7bad46f5d127ba010b10ea2af Mon Sep 17 00:00:00 2001
From: wqy <wqyuyu@outlook.com>
Date: Fri, 19 Jan 2024 00:08:04 +0800
Subject: [PATCH] Improve SA algorithm

---
 api/s34_sa_cal.py | 72 ++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 71 insertions(+), 1 deletion(-)

diff --git a/api/s34_sa_cal.py b/api/s34_sa_cal.py
index fd656f6..1a6faf1 100644
--- a/api/s34_sa_cal.py
+++ b/api/s34_sa_cal.py
@@ -1,3 +1,73 @@
+import os
+import ctypes
+from .project import have_project
+from .inp_out import dump_inp
+
+def calculate_service_area(name: str) -> list[dict[str, list[str]]]:
+    if not have_project(name):
+        raise Exception(f'Not found project [{name}]')
+
+    dir = os.path.abspath(os.getcwd())
+
+    inp_str = os.path.join(os.path.join(dir, 'db_inp'), name + '.db.inp')
+    dump_inp(name, inp_str, '2')
+
+    toolkit = ctypes.CDLL(os.path.join(os.path.join(dir, 'api'), 'toolkit.dll'))
+
+    inp = ctypes.c_char_p(inp_str.encode())
+
+    handle = ctypes.c_ulonglong()
+    toolkit.TK_ServiceArea_Start(inp, ctypes.byref(handle))
+
+    c_nodeCount = ctypes.c_size_t()
+    toolkit.TK_ServiceArea_GetNodeCount(handle, ctypes.byref(c_nodeCount))
+    nodeCount = c_nodeCount.value
+
+    nodeIds: list[str] = []
+
+    for n in range(0, nodeCount):
+        id = ctypes.c_char_p()
+        toolkit.TK_ServiceArea_GetNodeId(handle, ctypes.c_size_t(n), ctypes.byref(id))
+        nodeIds.append(id.value.decode())
+
+    c_timeCount = ctypes.c_size_t()
+    toolkit.TK_ServiceArea_GetTimeCount(handle, ctypes.byref(c_timeCount))
+    timeCount = c_timeCount.value
+
+    results: list[dict[str, list[str]]] = []
+
+    for t in range(0, timeCount):
+        c_sourceCount = ctypes.c_size_t()
+        toolkit.TK_ServiceArea_GetSourceCount(handle, ctypes.c_size_t(t), ctypes.byref(c_sourceCount))
+        sourceCount = c_sourceCount.value
+
+        sources = ctypes.POINTER(ctypes.c_size_t)()
+        toolkit.TK_ServiceArea_GetSources(handle, ctypes.c_size_t(t), ctypes.byref(sources))
+
+        result: dict[str, list[str]] = {}
+        for s in range(0, sourceCount):
+            result[nodeIds[sources[s]]] = []
+
+        for n in range(0, nodeCount):
+            concentration = ctypes.POINTER(ctypes.c_double)()
+            toolkit.TK_ServiceArea_GetConcentration(handle, ctypes.c_size_t(t), ctypes.c_size_t(n), ctypes.byref(concentration))
+
+            maxS = sources[0]
+            maxC = concentration[0]
+            for s in range(1, sourceCount):
+                if concentration[s] > maxC:
+                    maxS = sources[s]
+                    maxC = concentration[s]
+
+            result[nodeIds[maxS]].append(nodeIds[n])
+
+        results.append(result)
+
+    toolkit.TK_ServiceArea_End(handle)
+
+    return results
+
+'''
 import sys
 import json
 from queue import Queue
@@ -7,7 +77,6 @@ from .s0_base import get_node_links, get_link_nodes
 sys.path.append('..')
 from epanet.epanet import run_project
 
-
 def _calculate_service_area(name: str, inp, time_index: int = 0) -> dict[str, list[str]]:
     sources : dict[str, list[str]] = {}
     for node_result in inp['node_results']:
@@ -126,3 +195,4 @@ def calculate_service_area(name: str) -> list[dict[str, list[str]]]:
         result.append(sas)
 
     return result
+'''