global.allMapFeatures(): return all visible map features

src/CategoryBase.js

@@ -204,4 +204,8 @@ CategoryBase.prototype.notifyChildLoadEnd = function (category) {
   }
 }
 
+CategoryBase.prototype.allMapFeatures = function (callback) {
+  callback(null, [])
+}
+
 module.exports = CategoryBase

src/CategoryIndex.js

@@ -106,5 +106,24 @@ CategoryIndex.prototype.toggleCategory = function (id) {
   }.bind(this))
 }
 
+CategoryIndex.prototype.allMapFeatures = function (callback) {
+  let result = []
+
+  async.each(this.childrenCategories,
+    (category, done) => category.allMapFeatures(
+      (err, data) => {
+        if (err) {
+          return done(err)
+        }
+
+        result = result.concat(data)
+
+        global.setTimeout(done, 0)
+      }
+    ),
+    (err) => callback(err, result)
+  )
+}
+
 OpenStreetBrowserLoader.registerType('index', CategoryIndex)
 module.exports = CategoryIndex

src/CategoryOverpass.js

@@ -490,5 +490,13 @@ CategoryOverpass.prototype.renderTemplate = function (object, templateId, callba
   })
 }
 
+CategoryOverpass.prototype.allMapFeatures = function (callback) {
+  if (!this.isOpen) {
+    return callback(null, [])
+  }
+
+  callback(null, Object.values(this.layer.mainlayer.visibleFeatures))
+}
+
 OpenStreetBrowserLoader.registerType('overpass', CategoryOverpass)
 module.exports = CategoryOverpass

src/index.js

@@ -168,6 +168,10 @@ function onload2 (initState) {
   call_hooks('initFinish')
 }
 
+global.allMapFeatures = function (callback) {
+  global.baseCategory.allMapFeatures(callback)
+}
+
 window.setPath = function (path, state) {
   currentPath = path