src/10-overlay.ts (raw)
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class Point implements L.LatLngLiteral { lat: number = 0.00; lng: number = 0.00; } enum OverlayType { POINT = 0, CIRCLE = 1, POLYGON = 2, } interface Overlay { name: string; desc: string; points: Point[]; options: any; } class OverlayData implements Overlay { name: string; desc: string; points: Point[]; options: any; type: OverlayType; constructor(type: OverlayType, name: string, desc: string, points: Point[], options: any) { this.type = type; this.name = name; this.desc = desc; this.points = points; this.options = options; } } abstract class OverlayBase implements Overlay { name: string; desc: string; points: Point[]; options: any; protected self: any; constructor(name: string, desc: string, points: Point[], options: any) { this.name = name; this.desc = desc; this.points = points; this.options = options; } add(map: L.Map): void { this.self.addTo(map); } remove(map: L.Map): void { this.self.removeFrom(map); } } class Marker extends OverlayBase { constructor(name: string, desc: string, point: Point, options: any) { super(name, desc, [ point ], options); this.self = L.marker(point); this.self.bindPopup(`<h3>${name}</h3><p>${desc}</p>`); } } class Circle extends OverlayBase { constructor(name: string, desc: string, point: Point, options: any) { super(name, desc, [ point ], options); this.self = L.circle(point, options); } } class Polygon extends OverlayBase { constructor(name: string, desc: string, points: Point[], options: any) { super(name, desc, points, options); this.self = L.polygon(points, options); } } class OverlayState { markers: Marker[]; circles: Circle[]; polygons: Polygon[]; constructor() { this.markers = []; this.circles = []; this.polygons = []; } static load(): OverlayState { const store = localStorage.getItem("overlay_state"); if (store) { const model = JSON.parse(store); return { markers: model.markers.map((m: OverlayData) => OverlayState.fromData(m)), circles: model.circles.map((c: OverlayData) => OverlayState.fromData(c)), polygons: model.polygons.map((p: OverlayData) => OverlayState.fromData(p)), } as OverlayState } else { return new OverlayState(); } } static save(overlayState: OverlayState): void { localStorage.setItem("overlay_state", JSON.stringify({ markers: overlayState.markers.map((m: OverlayBase) => OverlayState.toData(m)), circles: overlayState.circles.map((c: OverlayBase) => OverlayState.toData(c)), polygons: overlayState.polygons.map((p: OverlayBase) => OverlayState.toData(p)), })); } static clear(overlayState: OverlayState, map: L.Map): OverlayState { overlayState.markers.forEach((m: Marker) => m.remove(map)); overlayState.circles.forEach((c: Circle) => c.remove(map)); overlayState.polygons.forEach((p: Polygon) => p.remove(map)); return new OverlayState(); } private static toData(source: OverlayBase): OverlayData { let type = OverlayType.POINT; if (source.points.length > 1) { type = OverlayType.POLYGON; } else if (source.options.radius) { type = OverlayType.CIRCLE; } return new OverlayData(type, source.name, source.desc, source.points, source.options); } private static fromData(data: OverlayData): OverlayBase { switch(data.type) { case OverlayType.POINT: return new Marker(data.name, data.desc, data.points[0], data.options); case OverlayType.CIRCLE: return new Circle(data.name, data.desc, data.points[0], data.options); case OverlayType.POLYGON: return new Polygon(data.name, data.desc, data.points, data.options); } } } |