feat: shortest path (plain implementation)

.babelrc

@@ -0,0 +1 @@
+{ "presets": ["@babel/preset-flow"] }

.idea/misc.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="JavaScriptSettings">
+    <option name="languageLevel" value="ES6" />
+  </component>
+</project>

.idea/workspace.xml

@@ -5,6 +5,13 @@
   </component>
   <component name="ChangeListManager">
     <list default="true" id="3c7078e7-6f30-4d92-9696-11496f9e6dff" name="Changes" comment="">
+      <change afterPath="$PROJECT_DIR$/.babelrc" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/comp/ShortestPath.js" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/test/test_nearest.js" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/api/click.js" beforeDir="false" afterPath="$PROJECT_DIR$/api/click.js" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/package-lock.json" beforeDir="false" afterPath="$PROJECT_DIR$/package-lock.json" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/package.json" beforeDir="false" afterPath="$PROJECT_DIR$/package.json" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/src/UMap.js" beforeDir="false" afterPath="$PROJECT_DIR$/src/UMap.js" afterDir="false" />
     </list>
     <option name="SHOW_DIALOG" value="false" />
@@ -33,23 +40,26 @@
     <option name="hideEmptyMiddlePackages" value="true" />
     <option name="showLibraryContents" value="true" />
   </component>
-  <component name="PropertiesComponent">{
+  <component name="PropertiesComponent"><![CDATA[{
-  &quot;keyToString&quot;: {
+  "keyToString": {
-    &quot;RunOnceActivity.OpenProjectViewOnStart&quot;: &quot;true&quot;,
+    "Node.js.test.js.executor": "Run",
-    &quot;RunOnceActivity.ShowReadmeOnStart&quot;: &quot;true&quot;,
+    "RunOnceActivity.OpenProjectViewOnStart": "true",
-    &quot;WebServerToolWindowFactoryState&quot;: &quot;false&quot;,
+    "RunOnceActivity.ShowReadmeOnStart": "true",
-    &quot;git-widget-placeholder&quot;: &quot;dev&quot;,
+    "WebServerToolWindowFactoryState": "false",
-    &quot;last_opened_file_path&quot;: &quot;/home/user/Documents/fd_data-structures/pj/frontend&quot;,
+    "git-widget-placeholder": "dev",
-    &quot;node.js.detected.package.eslint&quot;: &quot;true&quot;,
+    "last_opened_file_path": "/home/user/Documents/fd_data-structures/pj/frontend",
-    &quot;node.js.detected.package.tslint&quot;: &quot;true&quot;,
+    "node.js.detected.package.eslint": "true",
-    &quot;node.js.selected.package.eslint&quot;: &quot;(autodetect)&quot;,
+    "node.js.detected.package.tslint": "true",
-    &quot;node.js.selected.package.tslint&quot;: &quot;(autodetect)&quot;,
+    "node.js.selected.package.eslint": "(autodetect)",
-    &quot;nodejs_interpreter_path&quot;: &quot;/home/user/.nvm/versions/node/v20.10.0/bin/node&quot;,
+    "node.js.selected.package.tslint": "(autodetect)",
-    &quot;nodejs_package_manager_path&quot;: &quot;npm&quot;,
+    "nodejs_interpreter_path": "/home/user/.nvm/versions/node/v20.10.0/bin/node",
-    &quot;settings.editor.selected.configurable&quot;: &quot;settings.nodejs&quot;,
+    "nodejs_package_manager_path": "npm",
-    &quot;vue.rearranger.settings.migration&quot;: &quot;true&quot;
+    "npm.start.executor": "Run",
+    "settings.editor.selected.configurable": "editor.preferences.fonts.default",
+    "ts.external.directory.path": "/home/user/.local/share/JetBrains/Toolbox/apps/webstorm/plugins/javascript-impl/jsLanguageServicesImpl/external",
+    "vue.rearranger.settings.migration": "true"
   }
-}</component>
+}]]></component>
   <component name="RunManager">
     <configuration name="start" type="js.build_tools.npm" temporary="true" nameIsGenerated="true">
       <package-json value="$PROJECT_DIR$/package.json" />
@@ -81,6 +91,9 @@
       <workItem from="1701004587189" duration="3578000" />
       <workItem from="1701042611758" duration="10222000" />
       <workItem from="1701056208994" duration="5687000" />
+      <workItem from="1701847206194" duration="6179000" />
+      <workItem from="1702448962541" duration="5620000" />
+      <workItem from="1703419885970" duration="12662000" />
     </task>
     <servers />
   </component>

api/click.js

@@ -1,19 +1,167 @@
-import {post} from "../src/Networking";
+import {MinPriorityQueue} from "@datastructures-js/priority-queue";
+
+function haversine_distance(p1,p2) {
+    const toRadians = (degrees) => {
+        return degrees * Math.PI / 180;
+    };
+    const [lat1, lon1] = p1;
+    const [lat2, lon2] = p2;
+    const R = 6371;
+    const dLat = toRadians(lat2 - lat1);
+    const dLon = toRadians(lon2 - lon1);
+    const a = Math.sin(dLat / 2) * Math.sin(dLat / 2) +
+        Math.cos(toRadians(lat1)) * Math.cos(toRadians(lat2)) *
+        Math.sin(dLon / 2) * Math.sin(dLon / 2);
+    const c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
+    if (R * c < 0) console.log("WARNING!!!");
+    return R * c;
+}
+
+function find_nearest_node_id(nodes, point) {
+    const [lat, lon] = point;
+    let min_distance = 1e100;
+    let res = 0;
+    for (let node_id in nodes) {
+        const curr_distance = haversine_distance(nodes[node_id], point);
+        if (curr_distance < min_distance) {
+            min_distance = curr_distance;
+            res = node_id;
+        }
+    }
+    return res;
+}
+
+function __spa(nodes, ch, u, p) {
+    console.log(`node count: ${Object.keys(nodes).length}`);
+    const weight_cache = {};
+    try {
+        const get_weight = (n1, n2) => {
+            const tup = [n1, n2];
+            if (weight_cache[tup]) {
+                return weight_cache[[n1, n2]];
+            }
+            // console.log("21");
+            // console.log(`${nodes[n1]} ${nodes[n2]}`);
+            weight_cache[tup] = haversine_distance(nodes[n1], nodes[n2]);
+            return weight_cache[tup];
+        };
+        const dis = {};
+        const fa = {};
+        const vis = new Set();
+        const pq = new MinPriorityQueue();
+        // console.log(`nodes: ${JSON.stringify(nodes)}`);
+        dis[u] = 0;
+        pq.push([0, u]);
+        while (!pq.isEmpty()) {
+            const [d, v] = pq.pop();
+            if (vis.has(v) || !ch[v]) continue;
+            vis.add(v);
+            const t = ch[v].length;
+            for (let j = 0; j < t; ++j) {
+                const c = ch[v][j];
+                if (!nodes[c]) continue;
+                const w = get_weight(v, c);
+                if (!dis[c] || d + w < dis[c]) {
+                    dis[c] = d + w;
+                    pq.push([dis[c], c]);
+                    fa[c] = v;
+                }
+            }
+        }
+        // console.log(`fa = ${JSON.stringify(fa)}`);
+        let curr = p;
+        const res = [p];
+        // console.log(JSON.stringify(p));
+        vis.clear();
+        while (fa[curr]) {
+            // console.log(JSON.stringify(curr));
+            curr = fa[curr].toString();
+            if(vis.has(curr)) {
+                console.log(`Cycle at ${curr}`);
+                break;
+            }
+            vis.add(curr);
+            res.push(curr);
+        }
+        console.log("finished __spa.");
+        // console.log(JSON.stringify(res));
+        return res;
+    } catch (e) {
+        console.log(e);
+    }
+}
+
+function shortest_path(nodes, ways, start_point, end_point){
+    try { // console.log(`Calling shortest_path(${nodes},${ways},${start_point},${end_point})`);
+        const ch_dict = {};
+        for (const way_id in ways) {
+            const l = ways[way_id];
+            const n = l.length;
+            for (let i = 1; i < n; ++i) {
+                if (ch_dict[l[i]]) {
+                    ch_dict[l[i]].push(l[i - 1]);
+                } else {
+                    ch_dict[l[i]] = [l[i - 1]];
+                }
+                if (ch_dict[l[i - 1]]) {
+                    ch_dict[l[i - 1]].push(l[i]);
+                } else {
+                    ch_dict[l[i - 1]] = [l[i]];
+                }
+            }
+        }
+        // console.log(ch_dict);
+        const clean_nodes = {};
+        Object.keys(nodes).forEach((node_id) => {
+            if (ch_dict[node_id]) clean_nodes[node_id] = nodes[node_id];
+        });
+        const actual_start_node_id = find_nearest_node_id(clean_nodes, start_point);
+        const actual_end_node_id = find_nearest_node_id(clean_nodes, end_point);
+        console.log("calling __spa...");
+        const seq = __spa(clean_nodes, ch_dict, actual_start_node_id, actual_end_node_id);
+        const res = [end_point];
+        seq.forEach((node_id) => {
+            if (clean_nodes[node_id]) res.push(clean_nodes[node_id]);
+        });
+        res.push(start_point);
+        return res;
+    } catch (e) {
+        console.log(e);
+    }
+}
+
 
 export default function handler(req,res){
     const pts=JSON.parse(req.body);
     const latRange=pts.map((row)=>row[0]),
           lonRange=pts.map((row)=>row[1]);
-    const minlon=Math.min(...lonRange),minlat=Math.min(...latRange),
+    const minlon=Math.min(...lonRange) - 0.01,minlat=Math.min(...latRange) - 0.01,
-          maxlon=Math.max(...lonRange),maxlat=Math.max(...latRange);
+          maxlon=Math.max(...lonRange) + 0.01,maxlat=Math.max(...latRange) + 0.01;
-    const request_uri=`https://www.overpass-api.de/api/interpreter?data=[out:json];node[highway](${minlat},${minlon},${maxlat},${maxlon});out;`;
+    // console.log(`1+1`);
+    const request_uri=`https://www.overpass-api.de/api/interpreter?data=[out:json];way[highway](${minlat},${minlon},${maxlat},${maxlon});(._;>;);out body;`;
+    console.log(`Requesting ${request_uri}`);
     const fetch_debug_response= fetch(request_uri).then((response)=>{
         return response.json();
     });
     fetch_debug_response.then((debug_response)=>{
+        console.log(debug_response);
+        let ps = {};
+        let ws = {};
+        debug_response.elements.forEach((it)=> {
+            if (it.type === "node") {
+                ps[it.id] = [it.lat,it.lon];
+            } else if (it.type === "way") {
+                ws[it.id] = it.nodes;
+            }
+        });
+        // console.log(`pts[0]: ${pts[0]}`);
+        const path_found = shortest_path(ps,ws,pts[0],pts[pts.length - 1]);
+        // const path_found = [];
+        // console.log(JSON.stringify(path_found));
         res.status(200).json({
             log: `Method: click\nArgs: ${pts}\nStatus: requested "${request_uri}", got response ${JSON.stringify(debug_response.elements)}`,
-            multipolyline: JSON.stringify(pts),
+            multipolyline: JSON.stringify(path_found),
+            // __debug_pts: ps
         });
     }).catch(e=>{
         res.status(500);

api/handshake.js

@@ -1,11 +1,8 @@
 const __DEBUG__=1,
-      __APP_VERSION__='v0.1.2a',
+      __APP_VERSION__='v0.1.3a',
       __APP_INTRO__=`
-<b>Relocating Support</b>
+<b>Right way to follow.</b><br>
-Can't find where you are from? We now memorize the last location you visited. Tap the "Relocate" button to find your way home.<br>
+In this update you can find a shortest route for any given start and destination.<br>
-<b>Nearby Search</b>
-You can first locate a general area and schedule detailed travel plan later. Tap the magnifier/gear icon to toggle between Nearby Search mode and Global Search mode.
-<i>This update also includes several stability and UI improvements.</i>
 `;
 
 export default function handler(req,res){

package-lock.json

@@ -1,13 +1,14 @@
 {
   "name": "nanomap",
-  "version": "0.1.0",
+  "version": "0.1.1",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "nanomap",
-      "version": "0.1.0",
+      "version": "0.1.1",
       "dependencies": {
+        "@datastructures-js/priority-queue": "^6.3.0",
         "@emotion/react": "^11.11.1",
         "@emotion/styled": "^11.11.0",
         "@mui/icons-material": "^5.14.18",
@@ -20,7 +21,10 @@
         "react-scripts": "5.0.1"
       },
       "devDependencies": {
-        "@babel/plugin-proposal-private-property-in-object": "latest"
+        "@babel/cli": "^7.23.4",
+        "@babel/core": "^7.23.5",
+        "@babel/plugin-proposal-private-property-in-object": "latest",
+        "@babel/preset-flow": "^7.23.3"
       }
     },
     "node_modules/@aashutoshrathi/word-wrap": {
@@ -54,12 +58,90 @@
         "node": ">=6.0.0"
       }
     },
-    "node_modules/@babel/code-frame": {
+    "node_modules/@babel/cli": {
-      "version": "7.22.13",
+      "version": "7.23.4",
-      "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.22.13.tgz",
+      "resolved": "https://registry.npmjs.org/@babel/cli/-/cli-7.23.4.tgz",
-      "integrity": "sha512-XktuhWlJ5g+3TJXc5upd9Ks1HutSArik6jf2eAjYFyIOf4ej3RN+184cZbzDvbPnuTJIUhPKKJE3cIsYTiAT3w==",
+      "integrity": "sha512-j3luA9xGKCXVyCa5R7lJvOMM+Kc2JEnAEIgz2ggtjQ/j5YUVgfsg/WsG95bbsgq7YLHuiCOzMnoSasuY16qiCw==",
+      "dev": true,
       "dependencies": {
-        "@babel/highlight": "^7.22.13",
+        "@jridgewell/trace-mapping": "^0.3.17",
+        "commander": "^4.0.1",
+        "convert-source-map": "^2.0.0",
+        "fs-readdir-recursive": "^1.1.0",
+        "glob": "^7.2.0",
+        "make-dir": "^2.1.0",
+        "slash": "^2.0.0"
+      },
+      "bin": {
+        "babel": "bin/babel.js",
+        "babel-external-helpers": "bin/babel-external-helpers.js"
+      },
+      "engines": {
+        "node": ">=6.9.0"
+      },
+      "optionalDependencies": {
+        "@nicolo-ribaudo/chokidar-2": "2.1.8-no-fsevents.3",
+        "chokidar": "^3.4.0"
+      },
+      "peerDependencies": {
+        "@babel/core": "^7.0.0-0"
+      }
+    },
+    "node_modules/@babel/cli/node_modules/commander": {
+      "version": "4.1.1",
+      "resolved": "https://registry.npmjs.org/commander/-/commander-4.1.1.tgz",
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+      "dev": true,
+      "engines": {
+        "node": ">= 6"
+      }
+    },
+    "node_modules/@babel/cli/node_modules/make-dir": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/make-dir/-/make-dir-2.1.0.tgz",
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+      "dev": true,
+      "dependencies": {
+        "pify": "^4.0.1",
+        "semver": "^5.6.0"
+      },
+      "engines": {
+        "node": ">=6"
+      }
+    },
+    "node_modules/@babel/cli/node_modules/pify": {
+      "version": "4.0.1",
+      "resolved": "https://registry.npmjs.org/pify/-/pify-4.0.1.tgz",
+      "integrity": "sha512-uB80kBFb/tfd68bVleG9T5GGsGPjJrLAUpR5PZIrhBnIaRTQRjqdJSsIKkOP6OAIFbj7GOrcudc5pNjZ+geV2g==",
+      "dev": true,
+      "engines": {
+        "node": ">=6"
+      }
+    },
+    "node_modules/@babel/cli/node_modules/semver": {
+      "version": "5.7.2",
+      "resolved": "https://registry.npmjs.org/semver/-/semver-5.7.2.tgz",
+      "integrity": "sha512-cBznnQ9KjJqU67B52RMC65CMarK2600WFnbkcaiwWq3xy/5haFJlshgnpjovMVJ+Hff49d8GEn0b87C5pDQ10g==",
+      "dev": true,
+      "bin": {
+        "semver": "bin/semver"
+      }
+    },
+    "node_modules/@babel/cli/node_modules/slash": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/slash/-/slash-2.0.0.tgz",
+      "integrity": "sha512-ZYKh3Wh2z1PpEXWr0MpSBZ0V6mZHAQfYevttO11c51CaWjGTaadiKZ+wVt1PbMlDV5qhMFslpZCemhwOK7C89A==",
+      "dev": true,
+      "engines": {
+        "node": ">=6"
+      }
+    },
+    "node_modules/@babel/code-frame": {
+      "version": "7.23.5",
+      "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.23.5.tgz",
+      "integrity": "sha512-CgH3s1a96LipHCmSUmYFPwY7MNx8C3avkq7i4Wl3cfa662ldtUe4VM1TPXX70pfmrlWTb6jLqTYrZyT2ZTJBgA==",
+      "dependencies": {
+        "@babel/highlight": "^7.23.4",
         "chalk": "^2.4.2"
       },
       "engines": {
@@ -75,20 +157,20 @@
       }
     },
     "node_modules/@babel/core": {
-      "version": "7.23.3",
+      "version": "7.23.5",
-      "resolved": "https://registry.npmjs.org/@babel/core/-/core-7.23.3.tgz",
+      "resolved": "https://registry.npmjs.org/@babel/core/-/core-7.23.5.tgz",
-      "integrity": "sha512-Jg+msLuNuCJDyBvFv5+OKOUjWMZgd85bKjbICd3zWrKAo+bJ49HJufi7CQE0q0uR8NGyO6xkCACScNqyjHSZew==",
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       "dependencies": {
         "@ampproject/remapping": "^2.2.0",
-        "@babel/code-frame": "^7.22.13",
+        "@babel/code-frame": "^7.23.5",
-        "@babel/generator": "^7.23.3",
+        "@babel/generator": "^7.23.5",
         "@babel/helper-compilation-targets": "^7.22.15",
         "@babel/helper-module-transforms": "^7.23.3",
-        "@babel/helpers": "^7.23.2",
+        "@babel/helpers": "^7.23.5",
-        "@babel/parser": "^7.23.3",
+        "@babel/parser": "^7.23.5",
         "@babel/template": "^7.22.15",
-        "@babel/traverse": "^7.23.3",
+        "@babel/traverse": "^7.23.5",
-        "@babel/types": "^7.23.3",
+        "@babel/types": "^7.23.5",
         "convert-source-map": "^2.0.0",
         "debug": "^4.1.0",
         "gensync": "^1.0.0-beta.2",
@@ -145,11 +227,11 @@
       }
     },
     "node_modules/@babel/generator": {
-      "version": "7.23.3",
+      "version": "7.23.5",
-      "resolved": "https://registry.npmjs.org/@babel/generator/-/generator-7.23.3.tgz",
+      "resolved": "https://registry.npmjs.org/@babel/generator/-/generator-7.23.5.tgz",
-      "integrity": "sha512-keeZWAV4LU3tW0qRi19HRpabC/ilM0HRBBzf9/k8FFiG4KVpiv0FIy4hHfLfFQZNhziCTPTmd59zoyv6DNISzg==",
+      "integrity": "sha512-BPssCHrBD+0YrxviOa3QzpqwhNIXKEtOa2jQrm4FlmkC2apYgRnQcmPWiGZDlGxiNtltnUFolMe8497Esry+jA==",
       "dependencies": {
-        "@babel/types": "^7.23.3",
+        "@babel/types": "^7.23.5",
         "@jridgewell/gen-mapping": "^0.3.2",
         "@jridgewell/trace-mapping": "^0.3.17",
         "jsesc": "^2.5.1"
@@ -428,9 +510,9 @@
       }
     },
     "node_modules/@babel/helper-string-parser": {
-      "version": "7.22.5",
+      "version": "7.23.4",
-      "resolved": "https://registry.npmjs.org/@babel/helper-string-parser/-/helper-string-parser-7.22.5.tgz",
+      "resolved": "https://registry.npmjs.org/@babel/helper-string-parser/-/helper-string-parser-7.23.4.tgz",
-      "integrity": "sha512-mM4COjgZox8U+JcXQwPijIZLElkgEpO5rsERVDJTc2qfCDfERyob6k5WegS14SX18IIjv+XD+GrqNumY5JRCDw==",
+      "integrity": "sha512-803gmbQdqwdf4olxrX4AJyFBV/RTr3rSmOj0rKwesmzlfhYNDEs+/iOcznzpNWlJlIlTJC2QfPFcHB6DlzdVLQ==",
       "engines": {
         "node": ">=6.9.0"
       }
@@ -465,22 +547,22 @@
       }
     },
     "node_modules/@babel/helpers": {
-      "version": "7.23.2",
+      "version": "7.23.5",
-      "resolved": "https://registry.npmjs.org/@babel/helpers/-/helpers-7.23.2.tgz",
+      "resolved": "https://registry.npmjs.org/@babel/helpers/-/helpers-7.23.5.tgz",
-      "integrity": "sha512-lzchcp8SjTSVe/fPmLwtWVBFC7+Tbn8LGHDVfDp9JGxpAY5opSaEFgt8UQvrnECWOTdji2mOWMz1rOhkHscmGQ==",
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       "dependencies": {
         "@babel/template": "^7.22.15",
-        "@babel/traverse": "^7.23.2",
+        "@babel/traverse": "^7.23.5",
-        "@babel/types": "^7.23.0"
+        "@babel/types": "^7.23.5"
       },
       "engines": {
         "node": ">=6.9.0"
       }
     },
     "node_modules/@babel/highlight": {
-      "version": "7.22.20",
+      "version": "7.23.4",
-      "resolved": "https://registry.npmjs.org/@babel/highlight/-/highlight-7.22.20.tgz",
+      "resolved": "https://registry.npmjs.org/@babel/highlight/-/highlight-7.23.4.tgz",
-      "integrity": "sha512-dkdMCN3py0+ksCgYmGG8jKeGA/8Tk+gJwSYYlFGxG5lmhfKNoAy004YpLxpS1W2J8m/EK2Ew+yOs9pVRwO89mg==",
+      "integrity": "sha512-acGdbYSfp2WheJoJm/EBBBLh/ID8KDc64ISZ9DYtBmC8/Q204PZJLHyzeB5qMzJ5trcOkybd78M4x2KWsUq++A==",
       "dependencies": {
         "@babel/helper-validator-identifier": "^7.22.20",
         "chalk": "^2.4.2",
@@ -491,9 +573,9 @@
       }
     },
     "node_modules/@babel/parser": {
-      "version": "7.23.3",
+      "version": "7.23.5",
-      "resolved": "https://registry.npmjs.org/@babel/parser/-/parser-7.23.3.tgz",
+      "resolved": "https://registry.npmjs.org/@babel/parser/-/parser-7.23.5.tgz",
-      "integrity": "sha512-uVsWNvlVsIninV2prNz/3lHCb+5CJ+e+IUBfbjToAHODtfGYLfCFuY4AU7TskI+dAKk+njsPiBjq1gKTvZOBaw==",
+      "integrity": "sha512-hOOqoiNXrmGdFbhgCzu6GiURxUgM27Xwd/aPuu8RfHEZPBzL1Z54okAHAQjXfcQNwvrlkAmAp4SlRTZ45vlthQ==",
       "bin": {
         "parser": "bin/babel-parser.js"
       },
@@ -1899,6 +1981,23 @@
         "semver": "bin/semver.js"
       }
     },
+    "node_modules/@babel/preset-flow": {
+      "version": "7.23.3",
+      "resolved": "https://registry.npmjs.org/@babel/preset-flow/-/preset-flow-7.23.3.tgz",
+      "integrity": "sha512-7yn6hl8RIv+KNk6iIrGZ+D06VhVY35wLVf23Cz/mMu1zOr7u4MMP4j0nZ9tLf8+4ZFpnib8cFYgB/oYg9hfswA==",
+      "dev": true,
+      "dependencies": {
+        "@babel/helper-plugin-utils": "^7.22.5",
+        "@babel/helper-validator-option": "^7.22.15",
+        "@babel/plugin-transform-flow-strip-types": "^7.23.3"
+      },
+      "engines": {
+        "node": ">=6.9.0"
+      },
+      "peerDependencies": {
+        "@babel/core": "^7.0.0-0"
+      }
+    },
     "node_modules/@babel/preset-modules": {
       "version": "0.1.6-no-external-plugins",
       "resolved": "https://registry.npmjs.org/@babel/preset-modules/-/preset-modules-0.1.6-no-external-plugins.tgz",
@@ -1979,18 +2078,18 @@
       }
     },
     "node_modules/@babel/traverse": {
-      "version": "7.23.3",
+      "version": "7.23.5",
-      "resolved": "https://registry.npmjs.org/@babel/traverse/-/traverse-7.23.3.tgz",
+      "resolved": "https://registry.npmjs.org/@babel/traverse/-/traverse-7.23.5.tgz",
-      "integrity": "sha512-+K0yF1/9yR0oHdE0StHuEj3uTPzwwbrLGfNOndVJVV2TqA5+j3oljJUb4nmB954FLGjNem976+B+eDuLIjesiQ==",
+      "integrity": "sha512-czx7Xy5a6sapWWRx61m1Ke1Ra4vczu1mCTtJam5zRTBOonfdJ+S/B6HYmGYu3fJtr8GGET3si6IhgWVBhJ/m8w==",
       "dependencies": {
-        "@babel/code-frame": "^7.22.13",
+        "@babel/code-frame": "^7.23.5",
-        "@babel/generator": "^7.23.3",
+        "@babel/generator": "^7.23.5",
         "@babel/helper-environment-visitor": "^7.22.20",
         "@babel/helper-function-name": "^7.23.0",
         "@babel/helper-hoist-variables": "^7.22.5",
         "@babel/helper-split-export-declaration": "^7.22.6",
-        "@babel/parser": "^7.23.3",
+        "@babel/parser": "^7.23.5",
-        "@babel/types": "^7.23.3",
+        "@babel/types": "^7.23.5",
         "debug": "^4.1.0",
         "globals": "^11.1.0"
       },
@@ -1999,11 +2098,11 @@
       }
     },
     "node_modules/@babel/types": {
-      "version": "7.23.3",
+      "version": "7.23.5",
-      "resolved": "https://registry.npmjs.org/@babel/types/-/types-7.23.3.tgz",
+      "resolved": "https://registry.npmjs.org/@babel/types/-/types-7.23.5.tgz",
-      "integrity": "sha512-OZnvoH2l8PK5eUvEcUyCt/sXgr/h+UWpVuBbOljwcrAgUl6lpchoQ++PHGyQy1AtYnVA6CEq3y5xeEI10brpXw==",
+      "integrity": "sha512-ON5kSOJwVO6xXVRTvOI0eOnWe7VdUcIpsovGo9U/Br4Ie4UVFQTboO2cYnDhAGU6Fp+UxSiT+pMft0SMHfuq6w==",
       "dependencies": {
-        "@babel/helper-string-parser": "^7.22.5",
+        "@babel/helper-string-parser": "^7.23.4",
         "@babel/helper-validator-identifier": "^7.22.20",
         "to-fast-properties": "^2.0.0"
       },
@@ -2286,6 +2385,19 @@
         "postcss-selector-parser": "^6.0.10"
       }
     },
+    "node_modules/@datastructures-js/heap": {
+      "version": "4.3.2",
+      "resolved": "https://registry.npmjs.org/@datastructures-js/heap/-/heap-4.3.2.tgz",
+      "integrity": "sha512-7/9QSsIZ+wMG3C9++mz9iOjdtTp9C036PISHvNjG3eyFO8nXOBJQFKgeV7M6/+EPl+oXXFRGBb8Ue60LsqTqGw=="
+    },
+    "node_modules/@datastructures-js/priority-queue": {
+      "version": "6.3.0",
+      "resolved": "https://registry.npmjs.org/@datastructures-js/priority-queue/-/priority-queue-6.3.0.tgz",
+      "integrity": "sha512-bJkryPys8zVYMCSjyBPYzJlw5V2kMeOYzGHRBXiGkwqTv8vZ/Ux5RO736T8Y6l3cH+ocbQV9UxlsFwA9qI4VhA==",
+      "dependencies": {
+        "@datastructures-js/heap": "^4.3.1"
+      }
+    },
     "node_modules/@emotion/babel-plugin": {
       "version": "11.11.0",
       "resolved": "https://registry.npmjs.org/@emotion/babel-plugin/-/babel-plugin-11.11.0.tgz",
@@ -3620,6 +3732,13 @@
       "resolved": "https://registry.npmjs.org/react-is/-/react-is-18.2.0.tgz",
       "integrity": "sha512-xWGDIW6x921xtzPkhiULtthJHoJvBbF3q26fzloPCK0hsvxtPVelvftw3zjbHWSkR2km9Z+4uxbDDK/6Zw9B8w=="
     },
+    "node_modules/@nicolo-ribaudo/chokidar-2": {
+      "version": "2.1.8-no-fsevents.3",
+      "resolved": "https://registry.npmjs.org/@nicolo-ribaudo/chokidar-2/-/chokidar-2-2.1.8-no-fsevents.3.tgz",
+      "integrity": "sha512-s88O1aVtXftvp5bCPB7WnmXc5IwOZZ7YPuwNPt+GtOOXpPvad1LfbmjYv+qII7zP6RU2QGnqve27dnLycEnyEQ==",
+      "dev": true,
+      "optional": true
+    },
     "node_modules/@nicolo-ribaudo/eslint-scope-5-internals": {
       "version": "5.1.1-v1",
       "resolved": "https://registry.npmjs.org/@nicolo-ribaudo/eslint-scope-5-internals/-/eslint-scope-5-internals-5.1.1-v1.tgz",
@@ -8480,6 +8599,12 @@
       "resolved": "https://registry.npmjs.org/fs-monkey/-/fs-monkey-1.0.5.tgz",
       "integrity": "sha512-8uMbBjrhzW76TYgEV27Y5E//W2f/lTFmx78P2w19FZSxarhI/798APGQyuGCwmkNxgwGRhrLfvWyLBvNtuOmew=="
     },
+    "node_modules/fs-readdir-recursive": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/fs-readdir-recursive/-/fs-readdir-recursive-1.1.0.tgz",
+      "integrity": "sha512-GNanXlVr2pf02+sPN40XN8HG+ePaNcvM0q5mZBd668Obwb0yD5GiUbZOFgwn8kGMY6I3mdyDJzieUy3PTYyTRA==",
+      "dev": true
+    },
     "node_modules/fs.realpath": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/fs.realpath/-/fs.realpath-1.0.0.tgz",

package.json

@@ -3,6 +3,7 @@
   "version": "0.1.1",
   "private": true,
   "dependencies": {
+    "@datastructures-js/priority-queue": "^6.3.0",
     "@emotion/react": "^11.11.1",
     "@emotion/styled": "^11.11.0",
     "@mui/icons-material": "^5.14.18",
@@ -15,7 +16,10 @@
     "react-scripts": "5.0.1"
   },
   "devDependencies": {
-    "@babel/plugin-proposal-private-property-in-object": "latest"
+    "@babel/cli": "^7.23.4",
+    "@babel/core": "^7.23.5",
+    "@babel/plugin-proposal-private-property-in-object": "latest",
+    "@babel/preset-flow": "^7.23.3"
   },
   "scripts": {
     "start": "react-scripts start",

src/UMap.js

@@ -109,13 +109,18 @@ function MapClickHandler({mks,focusUpdater,locator,locker}) {
             post('POST', 'click', mks.current.state.markers).then((response) => {
                 // TODO: real functionality
                 const pl = JSON.parse(response.multipolyline);
-                mks.current.flushPolylines(pl);
+                // DEBUG
+                // response.__debug_pts.forEach(({lat,lon})=>{
+                //     mks.current.addCandMarker(lat,lon);
+                // });
+                console.log(`pl = ${JSON.stringify(pl)}`);
+                if (pl.length > 1) mks.current.flushPolylines(pl);
                 focusUpdater([lat,lng]);
                 locator([lat,lng]);
                 locker(true);
             }).catch((e) => {
                 console.error(e);
-                location.reload();
+                // location.reload();
             });
         },
         // TODO

test/test_nearest.js

@@ -0,0 +1,2 @@
+import shortestPath from "../comp/ShortestPath.js";
+console.log('Hello!');