From 6526c4c1f1f4cb3ad573b0a18ef991c1b67b3942 Mon Sep 17 00:00:00 2001
From: Azgaar <azgaar.fmg@yandex.com>
Date: Fri, 11 Oct 2024 11:29:41 +0200
Subject: [PATCH] feat: burg group editor - map preview

---
 index.html                      |  31 +-----
 modules/burgs-generator.js      | 163 +++++++++++++++++++++++++++++---
 modules/dynamic/auto-update.js  |  26 +++--
 modules/ui/burg-editor.js       |  40 ++++----
 modules/ui/burg-group-editor.js |   8 ++
 modules/ui/burgs-overview.js    |   4 +-
 modules/ui/editors.js           | 114 ----------------------
 7 files changed, 192 insertions(+), 194 deletions(-)

diff --git a/index.html b/index.html
index 2403f908..e3e47c41 100644
--- a/index.html
+++ b/index.html
@@ -3467,12 +3467,6 @@
             <div style="display: flex; justify-content: space-between">
               <span>Burg preview:</span>
               <div style="display: flex; gap: 0.5em">
-                <i
-                  id="burgLinkEdit"
-                  data-tip="Provide custom link to the burg map"
-                  class="icon-pencil pointer"
-                  style="margin-top: -0.1em"
-                ></i>
                 <i id="burgLinkOpen" data-tip="Open burg map in a new tab" class="icon-link-ext pointer"></i>
               </div>
             </div>
@@ -3502,7 +3496,7 @@
           </div>
 
           <button id="burgEditEmblem" data-tip="Edit emblem" class="icon-shield-alt"></button>
-          <button id="burgTogglePreview" data-tip="Toggle preview" class="icon-map"></button>
+          <button id="burgSetPreviewLink" data-tip="Set custom burg map URL" class="icon-map-o"></button>
           <button id="burgLocate" data-tip="Zoom map and center view in the burg" class="icon-target"></button>
           <button id="burgRelocate" data-tip="Relocate burg. Click on map to move the burg" class="icon-map-pin"></button>
           <button id="burglLegend" data-tip="Edit free text notes (legend) for this burg" class="icon-edit"></button>
@@ -5340,30 +5334,13 @@
       </div>
 
       <div id="burgGroupsEditor" class="dialog stable" style="display: none">
-        <form id="burgGroupsForm" class="table">
-          <table>
-            <colgroup>
-              <col style="width: 1em" />
-              <col style="width: 6em" />
-              <col style="width: 4em" />
-              <col style="width: 4em" />
-              <col style="width: 4em" />
-              <col style="width: 4em" />
-              <col style="width: 4em" />
-              <col style="width: 4em" />
-              <col style="width: 4em" />
-              <col style="width: 4em" />
-              <col style="width: 1em" />
-              <col style="width: 1em" />
-              <col style="width: 1em" />
-              <col style="width: 1em" />
-              <col style="width: 1em" />
-              <col style="width: 1em" />
-            </colgroup>
+        <form id="burgGroupsForm">
+          <table class="table">
             <thead>
               <tr>
                 <th data-tip="Rendering order: higher values are rendered on top">Order</th>
                 <th data-tip="Type group name">Name</th>
+                <th data-tip="Burg preview generator">Preview generator</th>
                 <th data-tip="Set min population constraint" colspan="2">Population</th>
                 <th data-tip="Set population percentile: 0-100, where 90 means the burg must have a population higher than 90% of all burgs">Percentile</th>
                 <th data-tip="Select allowed biomes">Biomes</th>
diff --git a/modules/burgs-generator.js b/modules/burgs-generator.js
index a44f0af0..64fcac0b 100644
--- a/modules/burgs-generator.js
+++ b/modules/burgs-generator.js
@@ -261,23 +261,21 @@ window.Burgs = (() => {
   }
 
   const getDefaultGroups = () => [
-    {name: "capitals", active: true, order: 9, features: {capital: true}, preview: "watabou-city-generator"},
-    {name: "cities", active: true, order: 8, percentile: 90, min: 5, preview: "watabou-city-generator"},
+    {name: "capitals", active: true, order: 9, features: {capital: true}, preview: "watabou-city"},
+    {name: "cities", active: true, order: 8, percentile: 90, min: 5, preview: "watabou-city"},
     {
       name: "forts",
       active: true,
       features: {citadel: true, walls: false, plaza: false, port: false},
       order: 6,
-      max: 1,
-      preview: null
+      max: 1
     },
     {
       name: "monasteries",
       active: true,
       features: {temple: true, walls: false, plaza: false, port: false},
       order: 5,
-      max: 0.8,
-      preview: null
+      max: 0.8
     },
     {
       name: "caravanserais",
@@ -285,8 +283,7 @@ window.Burgs = (() => {
       features: {port: false, plaza: true},
       order: 4,
       max: 0.8,
-      biomes: [1, 2, 3],
-      preview: null
+      biomes: [1, 2, 3]
     },
     {
       name: "trading_posts",
@@ -295,7 +292,7 @@ window.Burgs = (() => {
       features: {plaza: true},
       max: 0.8,
       biomes: [5, 6, 7, 8, 9, 10, 11, 12],
-      preview: null
+      preview: "watabou-dwelling"
     },
     {
       name: "villages",
@@ -304,7 +301,7 @@ window.Burgs = (() => {
       min: 0.1,
       max: 2,
       features: {walls: false},
-      preview: "watabou-village-generator"
+      preview: "watabou-village"
     },
     {
       name: "hamlets",
@@ -312,9 +309,9 @@ window.Burgs = (() => {
       order: 1,
       features: {walls: false, plaza: false},
       max: 0.1,
-      preview: "watabou-village-generator"
+      preview: "watabou-village"
     },
-    {name: "towns", active: true, order: 7, isDefault: true, preview: "watabou-city-generator"}
+    {name: "towns", active: true, order: 7, isDefault: true, preview: "watabou-city"}
   ];
 
   function defineGroup(burg, populations) {
@@ -359,6 +356,146 @@ window.Burgs = (() => {
     }
   }
 
+  const previewGeneratorsMap = {
+    "watabou-city": createWatabouCityLinks,
+    "watabou-village": createWatabouVillageLinks,
+    "watabou-dwelling": createWatabouDwellingLinks
+  };
+
+  function getPreview(burg) {
+    if (burg.link) return {link: burg.link, preview: burg.link};
+
+    const group = options.burgs.groups.find(g => g.name === burg.group);
+    if (!group?.preview || !previewGeneratorsMap[group.preview]) return {link: null, preview: null};
+
+    return previewGeneratorsMap[group.preview](burg);
+  }
+
+  function createWatabouCityLinks(burg) {
+    const cells = pack.cells;
+    const {i, name, population: burgPopulation, cell} = burg;
+    const burgSeed = burg.MFCG || seed + String(burg.i).padStart(4, 0);
+
+    const sizeRaw = 2.13 * Math.pow((burgPopulation * populationRate) / urbanDensity, 0.385);
+    const size = minmax(Math.ceil(sizeRaw), 6, 100);
+    const population = rn(burgPopulation * populationRate * urbanization);
+
+    const river = cells.r[cell] ? 1 : 0;
+    const coast = Number(burg.port > 0);
+    const sea = (() => {
+      if (!coast || !cells.haven[cell]) return null;
+
+      // calculate see direction: 0 = south, 0.5 = west, 1 = north, 1.5 = east
+      const p1 = cells.p[cell];
+      const p2 = cells.p[cells.haven[cell]];
+      let deg = (Math.atan2(p2[1] - p1[1], p2[0] - p1[0]) * 180) / Math.PI - 90;
+      if (deg < 0) deg += 360;
+      return rn(normalize(deg, 0, 360) * 2, 2);
+    })();
+
+    const arableBiomes = river ? [1, 2, 3, 4, 5, 6, 7, 8] : [5, 6, 7, 8];
+    const farms = +arableBiomes.includes(cells.biome[cell]);
+
+    const citadel = +burg.citadel;
+    const urban_castle = +(citadel && each(2)(i));
+
+    const hub = Routes.isCrossroad(cell);
+    const walls = +burg.walls;
+    const plaza = +burg.plaza;
+    const temple = +burg.temple;
+    const shantytown = +burg.shanty;
+
+    const url = new URL("https://watabou.github.io/city-generator/");
+    url.search = new URLSearchParams({
+      name,
+      population,
+      size,
+      seed: burgSeed,
+      river,
+      coast,
+      farms,
+      citadel,
+      urban_castle,
+      hub,
+      plaza,
+      temple,
+      walls,
+      shantytown,
+      gates: -1
+    });
+    if (sea) url.searchParams.append("sea", sea);
+
+    const link = url.toString();
+    return {link, preview: link + "&preview=1"};
+  }
+
+  function createWatabouVillageLinks(burg) {
+    const {cells, features} = pack;
+    const {i, population, cell} = burg;
+
+    const burgSeed = seed + String(i).padStart(4, 0);
+    const pop = rn(population * populationRate * urbanization);
+    const tags = [];
+
+    if (cells.r[cell] && cells.haven[cell]) tags.push("estuary");
+    else if (cells.haven[cell] && features[cells.f[cell]].cells === 1) tags.push("island,district");
+    else if (burg.port) tags.push("coast");
+    else if (cells.conf[cell]) tags.push("confluence");
+    else if (cells.r[cell]) tags.push("river");
+    else if (pop < 200 && each(4)(cell)) tags.push("pond");
+
+    const connectivityRate = Routes.getConnectivityRate(cell);
+    tags.push(connectivityRate > 1 ? "highway" : connectivityRate === 1 ? "dead end" : "isolated");
+
+    const biome = cells.biome[cell];
+    const arableBiomes = cells.r[cell] ? [1, 2, 3, 4, 5, 6, 7, 8] : [5, 6, 7, 8];
+    if (!arableBiomes.includes(biome)) tags.push("uncultivated");
+    else if (each(6)(cell)) tags.push("farmland");
+
+    const temp = grid.cells.temp[cells.g[cell]];
+    if (temp <= 0 || temp > 28 || (temp > 25 && each(3)(cell))) tags.push("no orchards");
+
+    if (!burg.plaza) tags.push("no square");
+
+    if (pop < 100) tags.push("sparse");
+    else if (pop > 300) tags.push("dense");
+
+    const width = (() => {
+      if (pop > 1500) return 1600;
+      if (pop > 1000) return 1400;
+      if (pop > 500) return 1000;
+      if (pop > 200) return 800;
+      if (pop > 100) return 600;
+      return 400;
+    })();
+    const height = rn(width / 2.05);
+
+    const url = new URL("https://watabou.github.io/village-generator/");
+    url.search = new URLSearchParams({pop, name: "", seed: burgSeed, width, height, tags});
+
+    const link = url.toString();
+    return {link, preview: link + "&preview=1"};
+  }
+
+  function createWatabouDwellingLinks(burg) {
+    const burgSeed = seed + String(burg.i).padStart(4, 0);
+    const pop = rn(burg.population * populationRate * urbanization);
+
+    const tags = (() => {
+      if (pop > 200) return ["large", "tall"];
+      if (pop > 100) return ["large"];
+      if (pop > 50) return ["tall"];
+      if (pop > 20) return ["low"];
+      return ["small"];
+    })();
+
+    const url = new URL("https://watabou.github.io/dwellings/");
+    url.search = new URLSearchParams({pop, name: "", seed: burgSeed, tags});
+
+    const link = url.toString();
+    return {link, preview: link + "&preview=1"};
+  }
+
   function add([x, y]) {
     const {cells} = pack;
 
@@ -410,5 +547,5 @@ window.Burgs = (() => {
     return burgId;
   }
 
-  return {generate, getDefaultGroups, specify, defineGroup, getType, add};
+  return {generate, getDefaultGroups, specify, defineGroup, getPreview, getType, add};
 })();
diff --git a/modules/dynamic/auto-update.js b/modules/dynamic/auto-update.js
index 1a8f78f6..1c842a03 100644
--- a/modules/dynamic/auto-update.js
+++ b/modules/dynamic/auto-update.js
@@ -830,21 +830,6 @@ export function resolveVersionConflicts(mapVersion) {
     });
   }
 
-  if (isOlderThan("1.97.0")) {
-    // v1.97.00 changed MFCG link to an arbitrary preview URL
-    options.showBurgPreview = options.showMFCGMap;
-    delete options.showMFCGMap;
-
-    pack.burgs.forEach(burg => {
-      if (!burg.i || burg.removed) return;
-
-      if (burg.MFCG) {
-        burg.link = getBurgLink(burg);
-        delete burg.MFCG;
-      }
-    });
-  }
-
   if (isOlderThan("1.98.0")) {
     // v1.98.00 changed compass layer and rose element id
     const rose = compass.select("use");
@@ -966,6 +951,17 @@ export function resolveVersionConflicts(mapVersion) {
       groups: groups.map(name => ({name, active: true, preview: null}))
     };
 
+    pack.burgs.forEach(burg => {
+      if (!burg.i || burg.removed) return;
+
+      if (burg.MFCG) {
+        burg.link = getBurgLink(burg);
+        delete burg.MFCG;
+      }
+    });
+
+    delete options.showBurgPreview;
+    delete options.showMFCGMap;
     delete options.villageMaxPopulation;
   }
 }
diff --git a/modules/ui/burg-editor.js b/modules/ui/burg-editor.js
index 342952d2..c6d507f8 100644
--- a/modules/ui/burg-editor.js
+++ b/modules/ui/burg-editor.js
@@ -32,7 +32,6 @@ function editBurg(id) {
   byId("burgPopulation").on("change", changePopulation);
   burgBody.querySelectorAll(".burgFeature").forEach(el => el.on("click", toggleFeature));
   byId("burgLinkOpen").on("click", openBurgLink);
-  byId("burgLinkEdit").on("click", changeBurgLink);
 
   byId("burgStyleShow").on("click", showStyleSection);
   byId("burgStyleHide").on("click", hideStyleSection);
@@ -41,7 +40,7 @@ function editBurg(id) {
   byId("burgEditAnchorStyle").on("click", editGroupAnchorStyle);
 
   byId("burgEmblem").on("click", openEmblemEdit);
-  byId("burgTogglePreview").on("click", toggleBurgPreview);
+  byId("burgSetPreviewLink").on("click", setCustomPreview);
   byId("burgEditEmblem").on("click", openEmblemEdit);
   byId("burgLocate").on("click", zoomIntoBurg);
   byId("burgRelocate").on("click", toggleRelocateBurg);
@@ -105,12 +104,7 @@ function editBurg(id) {
     COArenderer.trigger(coaID, b.coa);
     byId("burgEmblem").setAttribute("href", "#" + coaID);
 
-    if (options.showBurgPreview) {
-      byId("burgPreviewSection").style.display = "block";
-      updateBurgPreview(b);
-    } else {
-      byId("burgPreviewSection").style.display = "none";
-    }
+    updateBurgPreview(b);
   }
 
   function dragBurgLabel() {
@@ -231,31 +225,37 @@ function editBurg(id) {
   }
 
   function updateBurgPreview(burg) {
-    const src = getBurgLink(burg) + "&preview=1";
+    const preview = Burgs.getPreview(burg).preview;
+    if (!preview) {
+      byId("burgPreviewSection").style.display = "none";
+      return;
+    }
+
+    byId("burgPreviewSection").style.display = "block";
 
     // recreate object to force reload (Chrome bug)
     const container = byId("burgPreviewObject");
     container.innerHTML = "";
     const object = document.createElement("object");
     object.style.width = "100%";
-    object.data = src;
+    object.data = preview;
     container.insertBefore(object, null);
   }
 
   function openBurgLink() {
     const id = +elSelected.attr("data-id");
     const burg = pack.burgs[id];
-
-    openURL(getBurgLink(burg));
+    const link = Burgs.getPreview(burg).link;
+    if (link) openURL(link);
   }
 
-  function changeBurgLink() {
+  function setCustomPreview() {
     const id = +elSelected.attr("data-id");
     const burg = pack.burgs[id];
 
     prompt(
-      "Provide custom link to the burg map. It can be a link to Medieval Fantasy City Generator, a different tool, or just an image. Leave empty to use the default map",
-      {default: getBurgLink(burg), required: false},
+      "Provide custom URL to the burg map. It can be a link to a generator or just an image. Leave empty to use the default map preview",
+      {default: Burgs.getPreview(burg).link, required: false},
       link => {
         if (link) burg.link = link;
         else delete burg.link;
@@ -265,17 +265,11 @@ function editBurg(id) {
   }
 
   function openEmblemEdit() {
-    const id = +elSelected.attr("data-id"),
-      burg = pack.burgs[id];
+    const id = +elSelected.attr("data-id");
+    const burg = pack.burgs[id];
     editEmblem("burg", "burgCOA" + id, burg);
   }
 
-  function toggleBurgPreview() {
-    options.showBurgPreview = !options.showBurgPreview;
-    byId("burgPreviewSection").style.display = options.showBurgPreview ? "block" : "none";
-    byId("burgTogglePreview").className = options.showBurgPreview ? "icon-map" : "icon-map-o";
-  }
-
   function zoomIntoBurg() {
     const id = +elSelected.attr("data-id");
     const burg = pack.burgs[id];
diff --git a/modules/ui/burg-group-editor.js b/modules/ui/burg-group-editor.js
index 771c614b..a05d6049 100644
--- a/modules/ui/burg-group-editor.js
+++ b/modules/ui/burg-group-editor.js
@@ -61,6 +61,14 @@ function editBurgGroups() {
     return /* html */ `<tr name="${group.name}">
       <td data-tip="Rendering order: higher values are rendered on top"><input type="number" name="order" min="1" max="999" step="1" required value="${group.order || ''}" /></td>
       <td data-tip="Type group name. It can contain only text, digits and underscore"><input type="text" name="name" value="${group.name}" required pattern="\\w+" /></td>
+      <td data-tip="Burg preview generator">
+        <select name="preview">
+          <option value="" ${!group.preview ? "selected" : ""}>no</option>
+          <option value="watabou-city" ${group.preview === "watabou-city" ? "selected" : ""}>Watabou City</option>
+          <option value="watabou-village" ${group.preview === "watabou-village" ? "selected" : ""}>Watabou Village</option>
+          <option value="watabou-dwelling" ${group.preview === "watabou-dwellings" ? "selected" : ""}>Watabou Dwelling</option>
+        </select>
+      </td>
       <td data-tip="Set min population constraint"><input type="number" name="min" min="0" step="any" value="${group.min || ''}" /></td>
       <td data-tip="Set max population constraint"><input type="number" name="max" min="0" step="any" value="${group.max || ''}" /></td>
       <td data-tip="Set population percentile"><input type="number" name="percentile" min="0" max="100" step="any" value="${group.percentile || ''}" /></td>
diff --git a/modules/ui/burgs-overview.js b/modules/ui/burgs-overview.js
index f3747da7..3d344d1d 100644
--- a/modules/ui/burgs-overview.js
+++ b/modules/ui/burgs-overview.js
@@ -423,7 +423,7 @@ function overviewBurgs(settings = {stateId: null, cultureId: null}) {
   }
 
   function downloadBurgsData() {
-    let data = `Id,Burg,Province,Province Full Name,State,State Full Name,Culture,Religion,Group,Population,X,Y,Latitude,Longitude,Elevation (${heightUnit.value}),Temperature,Temperature likeness,Capital,Port,Citadel,Walls,Plaza,Temple,Shanty Town,Emblem,City Generator Link\n`; // headers
+    let data = `Id,Burg,Province,Province Full Name,State,State Full Name,Culture,Religion,Group,Population,X,Y,Latitude,Longitude,Elevation (${heightUnit.value}),Temperature,Temperature likeness,Capital,Port,Citadel,Walls,Plaza,Temple,Shanty Town,Emblem,Preview link\n`; // headers
     const valid = pack.burgs.filter(b => b.i && !b.removed); // all valid burgs
 
     valid.forEach(b => {
@@ -458,7 +458,7 @@ function overviewBurgs(settings = {stateId: null, cultureId: null}) {
       data += b.temple ? "temple," : ",";
       data += b.shanty ? "shanty town," : ",";
       data += b.coa ? JSON.stringify(b.coa).replace(/"/g, "").replace(/,/g, ";") + "," : ",";
-      data += getBurgLink(b);
+      data += Burgs.getPreview(b).link;
 
       data += "\n";
     });
diff --git a/modules/ui/editors.js b/modules/ui/editors.js
index 3d8ba2a7..6ea20923 100644
--- a/modules/ui/editors.js
+++ b/modules/ui/editors.js
@@ -240,120 +240,6 @@ function togglePort(burg) {
     .attr("height", size);
 }
 
-// TODO: rework this function to use the new data structure
-function getBurgLink(burg) {
-  if (burg.link) return burg.link;
-  if (burg.citadel || burg.walls || burg.temple || burg.shanty) return createMfcgLink(burg);
-  return createVillageGeneratorLink(burg);
-}
-
-function createMfcgLink(burg) {
-  const {cells} = pack;
-  const {i, name, population: burgPopulation, cell} = burg;
-  const burgSeed = burg.MFCG || seed + String(burg.i).padStart(4, 0);
-
-  const sizeRaw = 2.13 * Math.pow((burgPopulation * populationRate) / urbanDensity, 0.385);
-  const size = minmax(Math.ceil(sizeRaw), 6, 100);
-  const population = rn(burgPopulation * populationRate * urbanization);
-
-  const river = cells.r[cell] ? 1 : 0;
-  const coast = Number(burg.port > 0);
-  const sea = (() => {
-    if (!coast || !cells.haven[cell]) return null;
-
-    // calculate see direction: 0 = south, 0.5 = west, 1 = north, 1.5 = east
-    const p1 = cells.p[cell];
-    const p2 = cells.p[cells.haven[cell]];
-    let deg = (Math.atan2(p2[1] - p1[1], p2[0] - p1[0]) * 180) / Math.PI - 90;
-    if (deg < 0) deg += 360;
-    return rn(normalize(deg, 0, 360) * 2, 2);
-  })();
-
-  const arableBiomes = river ? [1, 2, 3, 4, 5, 6, 7, 8] : [5, 6, 7, 8];
-  const farms = +arableBiomes.includes(cells.biome[cell]);
-
-  const citadel = +burg.citadel;
-  const urban_castle = +(citadel && each(2)(i));
-
-  const hub = Routes.isCrossroad(cell);
-  const walls = +burg.walls;
-  const plaza = +burg.plaza;
-  const temple = +burg.temple;
-  const shantytown = +burg.shanty;
-
-  const url = new URL("https://watabou.github.io/city-generator/");
-  url.search = new URLSearchParams({
-    name,
-    population,
-    size,
-    seed: burgSeed,
-    river,
-    coast,
-    farms,
-    citadel,
-    urban_castle,
-    hub,
-    plaza,
-    temple,
-    walls,
-    shantytown,
-    gates: -1
-  });
-  if (sea) url.searchParams.append("sea", sea);
-
-  return url.toString();
-}
-
-function createVillageGeneratorLink(burg) {
-  const {cells, features} = pack;
-  const {i, population, cell} = burg;
-
-  const pop = rn(population * populationRate * urbanization);
-  const burgSeed = seed + String(i).padStart(4, 0);
-  const tags = [];
-
-  if (cells.r[cell] && cells.haven[cell]) tags.push("estuary");
-  else if (cells.haven[cell] && features[cells.f[cell]].cells === 1) tags.push("island,district");
-  else if (burg.port) tags.push("coast");
-  else if (cells.conf[cell]) tags.push("confluence");
-  else if (cells.r[cell]) tags.push("river");
-  else if (pop < 200 && each(4)(cell)) tags.push("pond");
-
-  const roadsNumber = Object.values(pack.cells.routes[cell] || {}).filter(routeId => {
-    const route = pack.routes.find(route => route.i === routeId);
-    if (!route) return false;
-    return route.group === "roads" || route.group === "trails";
-  }).length;
-  tags.push(roadsNumber > 1 ? "highway" : roadsNumber === 1 ? "dead end" : "isolated");
-
-  const biome = cells.biome[cell];
-  const arableBiomes = cells.r[cell] ? [1, 2, 3, 4, 5, 6, 7, 8] : [5, 6, 7, 8];
-  if (!arableBiomes.includes(biome)) tags.push("uncultivated");
-  else if (each(6)(cell)) tags.push("farmland");
-
-  const temp = grid.cells.temp[cells.g[cell]];
-  if (temp <= 0 || temp > 28 || (temp > 25 && each(3)(cell))) tags.push("no orchards");
-
-  if (!burg.plaza) tags.push("no square");
-
-  if (pop < 100) tags.push("sparse");
-  else if (pop > 300) tags.push("dense");
-
-  const width = (() => {
-    if (pop > 1500) return 1600;
-    if (pop > 1000) return 1400;
-    if (pop > 500) return 1000;
-    if (pop > 200) return 800;
-    if (pop > 100) return 600;
-    return 400;
-  })();
-  const height = rn(width / 2.2);
-
-  const url = new URL("https://watabou.github.io/village-generator/");
-  url.search = new URLSearchParams({pop, name: "", seed: burgSeed, width, height, tags});
-  return url.toString();
-}
-
 // draw legend box
 function drawLegend(name, data) {
   legend.selectAll("*").remove(); // fully redraw every time