裏列車探索を外部に出力

stateBox/useBusAndTrainData.js

@@ -1,10 +1,12 @@
 import React, { createContext, useContext, useState } from "react";
+import trainList from "../assets/originData/trainList";
 const initialState = {
   busAndTrainData: [],
   setBusAndTrainData: () => {},
   trainPairData: [],
   setTrainPairData: () => {},
   initializeTrainPairList: () => {},
+  getInfluencedTrainData: () => {},
 };
 
 const BusAndTrainDataContext = createContext(initialState);
@@ -23,6 +25,34 @@ export const BusAndTrainDataProvider = ({ children }) => {
     });
     return trainPairList;
   };
+  const getInfluencedTrainData = (trainNum) => {
+    const trainPairList = initializeTrainPairList();
+
+    const returnArray = [];
+    if (!trainNum) return;
+    if (trainPairList[trainNum]) {
+      returnArray.push(Object.keys(trainPairList[trainNum])[0]);
+    }
+    if (
+      // 列番が4xxDまたは5xxDの場合はxxDの列番を検索
+      new RegExp(/^4[1-9]\d\d[DM]$/).test(trainNum) ||
+      new RegExp(/^5[1-7]\d\d[DM]$/).test(trainNum)
+    ) {
+      if (trainList[trainNum.substring(1)]) {
+        returnArray.push(trainNum.substring(1));
+      }
+    }
+    if (new RegExp(/^[1-9]\d\d[DM]$/).test(trainNum)) {
+      // 列番がxxDの場合は4xxDと5xxDの列番を検索
+      if (trainList["4" + trainNum]) returnArray.push("4" + trainNum);
+      if (trainList["5" + trainNum]) returnArray.push("5" + trainNum);
+    }
+    if (!returnArray[0]) return [[], []];
+    const TD = trainList[returnArray[0]];
+    if (!TD) return [[], []];
+    const TDArray = TD.split("#").filter((d) => d != "");
+    return [returnArray, TDArray];
+  };
   return (
     <BusAndTrainDataContext.Provider
       value={{
@@ -31,6 +61,7 @@ export const BusAndTrainDataProvider = ({ children }) => {
         trainPairData,
         setTrainPairData,
         initializeTrainPairList,
+        getInfluencedTrainData,
       }}
     >
       {children}