wip: add a basic importer for commune shapes

Mainly wanted to have two improters to play with, in order to
better understand the common part, and thus the API we may define
between them and the importer panel.

umap/static/umap/js/modules/autocomplete.js

@@ -257,7 +257,6 @@ export class BaseAjax extends BaseAutocomplete {
     if (response && response.ok) {
       return await response.json()
     }
-
   }
 }
 

umap/static/umap/js/modules/plugins/communes.js

@@ -0,0 +1,60 @@
+import { DomUtil, DomEvent, stamp } from '../../../vendors/leaflet/leaflet-src.esm.js'
+import { translate } from '../i18n.js'
+import { BaseAjax, SingleMixin } from '../autocomplete.js'
+import { Request } from '../request.js'
+import Alert from '../ui/alert.js'
+import Dialog from '../ui/dialog.js'
+
+class Autocomplete extends SingleMixin(BaseAjax) {
+  URL = 'https://geo.api.gouv.fr/communes?nom={q}&limit=5'
+
+  createResult(item) {
+    return super.createResult({
+      value: item.code,
+      label: `${item.nom} (${item.code})`,
+    })
+  }
+}
+
+export class Plugin {
+  constructor(map) {
+    this.map = map
+    this.name = 'Communes'
+    this.type = 'importer'
+    this.dialog = new Dialog(this.map._controlContainer)
+    this.map.registerPlugin(this)
+    this.options = {
+      theme: null,
+      boundary: null,
+      aspoint: false,
+    }
+    const alert = new Alert(document.querySelector('header'))
+    this.request = new Request(alert)
+  }
+
+  addImporter() {
+    return {
+      name: this.name,
+      callback: this.open,
+    }
+  }
+
+  async open(importer) {
+    const container = DomUtil.create('div')
+    DomUtil.createTitle(container, this.name)
+    const options = {
+      on_select: (choice) => {
+        this.options.boundary = choice.item.value
+        importer.urlInput.value = `https://geo.api.gouv.fr/communes?code=${this.options.boundary}&format=geojson&geometry=contour`
+        importer.typeInput.value = 'geojson'
+        this.dialog.close()
+      },
+    }
+    this.autocomplete = new Autocomplete(container, options)
+
+    this.dialog.open({
+      content: container,
+      className: 'communes dark',
+    })
+  }
+}