terriajs
Version:
Geospatial data visualization platform.
85 lines • 3.52 kB
JavaScript
var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
return c > 3 && r && Object.defineProperty(target, key, r), r;
};
import i18next from "i18next";
import { action, computed, makeObservable } from "mobx";
import { parseZip } from "shpjs";
import { isJsonObject } from "../../../Core/Json";
import loadBlob, { isZip } from "../../../Core/loadBlob";
import TerriaError from "../../../Core/TerriaError";
import GeoJsonMixin from "../../../ModelMixins/GeojsonMixin";
import ShapefileCatalogItemTraits from "../../../Traits/TraitsClasses/ShapefileCatalogItemTraits";
import CommonStrata from "../../Definition/CommonStrata";
import CreateModel from "../../Definition/CreateModel";
import proxyCatalogItemUrl from "../proxyCatalogItemUrl";
import { fileApiNotSupportedError } from "./GeoJsonCatalogItem";
export function isJsonArrayOrDeepArrayOfObjects(value) {
return (Array.isArray(value) &&
value.every((child) => isJsonObject(child) || isJsonArrayOrDeepArrayOfObjects(child)));
}
class ShapefileCatalogItem extends GeoJsonMixin(CreateModel(ShapefileCatalogItemTraits)) {
static type = "shp";
constructor(...args) {
super(...args);
makeObservable(this);
}
get type() {
return ShapefileCatalogItem.type;
}
get typeName() {
return i18next.t("models.shapefile.name");
}
setFileInput(file) {
this.setTrait(CommonStrata.user, "url", URL.createObjectURL(file) + "#" + file.name);
}
get hasLocalData() {
return this.url?.startsWith("blob:") ?? false;
}
async forceLoadGeojsonData() {
if (this.url) {
if (this.hasLocalData || isZip(this.url)) {
if (typeof FileReader === "undefined") {
throw fileApiNotSupportedError(this.terria);
}
const blob = await loadBlob(proxyCatalogItemUrl(this, this.url));
return await parseShapefile(blob);
}
else {
throw TerriaError.from("Invalid URL: Only zipped shapefiles are supported (the extension must be `.zip`)");
}
}
throw TerriaError.from("Failed to load shapefile - no URL of file has been defined");
}
}
__decorate([
action
], ShapefileCatalogItem.prototype, "setFileInput", null);
__decorate([
computed
], ShapefileCatalogItem.prototype, "hasLocalData", null);
const mergeFeatureCollections = (items) => {
const output = {
type: "FeatureCollection",
features: []
};
for (let i = 0; i < items.length; i++) {
const item = items[i];
for (let j = 0; j < item.features.length; j++) {
output.features.push(item.features[j]);
}
}
return output;
};
async function parseShapefile(blob) {
const asAb = await blob.arrayBuffer();
const json = await parseZip(asAb);
if (isJsonArrayOrDeepArrayOfObjects(json)) {
return mergeFeatureCollections(json);
}
return json;
}
export default ShapefileCatalogItem;
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