272 lines
No EOL
9.3 KiB
TypeScript
272 lines
No EOL
9.3 KiB
TypeScript
/**
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* Handles all changes made to OSM.
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* Needs an authenticator via OsmConnection
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*/
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import {OsmConnection} from "./OsmConnection";
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import {OsmNode, OsmObject} from "./OsmObject";
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import {ElementStorage} from "./ElementStorage";
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import {UIEventSource} from "../UI/UIEventSource";
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import {Question, QuestionDefinition} from "./Question";
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import {And, Tag, TagsFilter} from "./TagsFilter";
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export class Changes {
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private static _nextId = -1; // New assined ID's are negative
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private readonly login: OsmConnection;
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public readonly _allElements: ElementStorage;
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private _pendingChanges: { elementId: string, key: string, value: string }[] = []; // Gets reset on uploadAll
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private newElements: OsmObject[] = []; // Gets reset on uploadAll
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public readonly pendingChangesES = new UIEventSource<number>(this._pendingChanges.length);
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public readonly isSaving = new UIEventSource(false);
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private readonly _changesetComment: string;
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constructor(
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changesetComment: string,
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login: OsmConnection,
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allElements: ElementStorage) {
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this._changesetComment = changesetComment;
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this.login = login;
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this._allElements = allElements;
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}
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addTag(elementId: string, tagsFilter : TagsFilter){
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if(tagsFilter instanceof Tag){
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const tag = tagsFilter as Tag;
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this.addChange(elementId, tag.key, tag.value);
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return;
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}
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if(tagsFilter instanceof And){
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const and = tagsFilter as And;
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for (const tag of and.and) {
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this.addTag(elementId, tag);
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}
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return;
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}
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console.log("Unsupported tagsfilter element to addTag", tagsFilter);
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throw "Unsupported tagsFilter element";
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}
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/**
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* Adds a change to the pending changes
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* @param elementId
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* @param key
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* @param value
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*/
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addChange(elementId: string, key: string, value: string) {
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console.log("Received change",key, value)
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if (key === undefined || key === null) {
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console.log("Invalid key");
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return;
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}
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if (value === undefined || value === null) {
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console.log("Invalid value for ",key);
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return;
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}
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const eventSource = this._allElements.getElement(elementId);
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eventSource.data[key] = value;
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eventSource.ping();
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// We get the id from the event source, as that ID might be rewritten
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this._pendingChanges.push({elementId: eventSource.data.id, key: key, value: value});
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this.pendingChangesES.setData(this._pendingChanges.length);
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}
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/**
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* Create a new node element at the given lat/long.
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* An internal OsmObject is created to upload later on, a geojson represention is returned.
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* Note that the geojson version shares the tags (properties) by pointer, but has _no_ id in properties
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*/
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createElement(basicTags:Tag[], lat: number, lon: number) {
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const osmNode = new OsmNode(Changes._nextId);
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this.newElements.push(osmNode);
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Changes._nextId--;
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const id = "node/" + osmNode.id;
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osmNode.lat = lat;
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osmNode.lon = lon;
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const properties = {id: id};
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const geojson = {
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"type": "Feature",
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"properties": properties,
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"id": id,
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"geometry": {
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"type": "Point",
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"coordinates": [
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lon,
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lat
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]
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}
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}
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this._allElements.addOrGetElement(geojson);
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// The basictags are COPIED, the id is included in the properties
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// The tags are not yet written into the OsmObject, but this is applied onto a
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for (const kv of basicTags) {
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this.addChange(id, kv.key, kv.value); // We use the call, to trigger all the other machinery (including updating the geojson itsel
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properties[kv.key] = kv.value;
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}
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return geojson;
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}
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public uploadAll(optionalContinuation: (() => void)) {
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const self = this;
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this.isSaving.setData(true);
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const optionalContinuationWrapped = function () {
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self.isSaving.setData(false);
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if (optionalContinuation) {
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optionalContinuation();
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}
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}
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const pending: { elementId: string; key: string; value: string }[] = this._pendingChanges;
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this._pendingChanges = [];
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this.pendingChangesES.setData(this._pendingChanges.length);
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const newElements = this.newElements;
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this.newElements = [];
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const knownElements = {}; // maps string --> OsmObject
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function DownloadAndContinue(neededIds, continuation: (() => void)) {
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// local function which downloads all the objects one by one
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// this is one big loop, running one download, then rerunning the entire function
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if (neededIds.length == 0) {
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continuation();
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return;
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}
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const neededId = neededIds.pop();
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if (neededId in knownElements) {
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DownloadAndContinue(neededIds, continuation);
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return;
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}
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console.log("Downloading ", neededId);
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OsmObject.DownloadObject(neededId,
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function (element) {
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knownElements[neededId] = element; // assign the element for later, continue downloading the next element
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DownloadAndContinue(neededIds, continuation);
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}
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);
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}
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const neededIds = [];
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for (const change of pending) {
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const id = change.elementId;
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if (parseFloat(id.split("/")[1]) < 0) {
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console.log("Detected a new element! Exciting!")
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} else {
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neededIds.push(id);
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}
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}
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DownloadAndContinue(neededIds, function () {
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// Here, inside the continuation, we know that all 'neededIds' are loaded in 'knownElements'
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// We apply the changes on them
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for (const change of pending) {
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if (parseInt(change.elementId.split("/")[1]) < 0) {
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// This is a new element - we should apply this on one of the new elements
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for (const newElement of newElements) {
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if (newElement.type + "/" + newElement.id === change.elementId) {
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newElement.addTag(change.key, change.value);
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}
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}
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} else {
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console.log(knownElements, change.elementId);
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knownElements[change.elementId].addTag(change.key, change.value);
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// note: addTag will flag changes with 'element.changed' internally
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}
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}
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// Small sanity check for duplicate information
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let changedElements = [];
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for (const elementId in knownElements) {
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const element = knownElements[elementId];
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if (element.changed) {
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changedElements.push(element);
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}
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}
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if (changedElements.length == 0 && newElements.length == 0) {
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console.log("No changes in any object");
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return;
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}
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const handleMapping = function (idMapping) {
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for (const oldId in idMapping) {
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const newId = idMapping[oldId];
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const element = self._allElements.getElement(oldId);
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element.data.id = newId;
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self._allElements.addElementById(newId, element);
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element.ping();
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}
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}
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console.log("Beginning upload...");
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// At last, we build the changeset and upload
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self.login.UploadChangeset(self._changesetComment,
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function (csId) {
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let modifications = "";
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for (const element of changedElements) {
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if (!element.changed) {
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continue;
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}
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modifications += element.ChangesetXML(csId) + "\n";
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}
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let creations = "";
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for (const newElement of newElements) {
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creations += newElement.ChangesetXML(csId);
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}
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let changes = "<osmChange version='0.6' generator='Mapcomplete 0.0.0'>";
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if (creations.length > 0) {
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changes +=
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"<create>" +
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creations +
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"</create>";
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}
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if (modifications.length > 0) {
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changes +=
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"<modify>" +
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modifications +
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"</modify>";
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}
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changes += "</osmChange>";
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return changes;
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},
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handleMapping,
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optionalContinuationWrapped);
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});
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}
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public asQuestions(qs : QuestionDefinition[]){
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let ls = [];
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for (var i in qs){
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ls.push(new Question(this, qs[i]));
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}
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return ls;
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}
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} |