meshviewer/lib/map.js

define(["map/clientlayer", "map/labelslayer",
        "d3", "leaflet", "moment", "locationmarker", "rbush",
        "leaflet.label", "leaflet.providers"],
  function (ClientLayer, LabelsLayer, d3, L, moment, LocationMarker, rbush) {
    var options = { worldCopyJump: true,
                    zoomControl: false
                  };

    var AddLayerButton = L.Control.extend({
        options: {
          position: "bottomright"
        },

        initialize: function (f, options) {
          L.Util.setOptions(this, options);
          this.f = f;
        },

        onAdd: function () {
          var button = L.DomUtil.create("button", "add-layer");
          button.textContent = "\uF2C7";

          // L.DomEvent.disableClickPropagation(button)
          // Click propagation isn't disabled as this causes problems with the
          // location picking mode; instead propagation is stopped in onClick().
          L.DomEvent.addListener(button, "click", this.f, this);

          this.button = button;

          return button;
        }
    });

    var LocateButton = L.Control.extend({
        options: {
          position: "bottomright"
        },

        active: false,
        button: undefined,

        initialize: function (f, options) {
          L.Util.setOptions(this, options);
          this.f = f;
        },

        onAdd: function () {
          var button = L.DomUtil.create("button", "locate-user");
          button.textContent = "\uF2E9";

          L.DomEvent.disableClickPropagation(button);
          L.DomEvent.addListener(button, "click", this.onClick, this);

          this.button = button;

          return button;
        },

        update: function() {
          this.button.classList.toggle("active", this.active);
        },

        set: function(v) {
          this.active = v;
          this.update();
        },

        onClick: function () {
          this.f(!this.active);
        }
    });

    var CoordsPickerButton = L.Control.extend({
      options: {
        position: "bottomright"
      },

      active: false,
      button: undefined,

      initialize: function (f, options) {
        L.Util.setOptions(this, options);
        this.f = f;
      },

      onAdd: function () {
        var button = L.DomUtil.create("button", "coord-picker");
        button.textContent = "\uF2A6";

        // Click propagation isn't disabled as this causes problems with the
        // location picking mode; instead propagation is stopped in onClick().
        L.DomEvent.addListener(button, "click", this.onClick, this);

        this.button = button;

        return button;
      },

      update: function() {
        this.button.classList.toggle("active", this.active);
      },

      set: function(v) {
        this.active = v;
        this.update();
      },

      onClick: function (e) {
        L.DomEvent.stopPropagation(e);
        this.f(!this.active);
      }

    });

    function mkMarker(dict, iconFunc, router) {
      return function (d) {
        var m = L.circleMarker([d.nodeinfo.location.latitude, d.nodeinfo.location.longitude], iconFunc(d));

        m.resetStyle = function () {
          m.setStyle(iconFunc(d));
        };

        m.on("click", router.node(d));
        m.bindLabel(d.nodeinfo.hostname);

        dict[d.nodeinfo.node_id] = m;

        return m;
      };
    }

    function addLinksToMap(dict, linkScale, graph, router) {
      graph = graph.filter( function (d) {
        return "distance" in d && d.type !== "VPN";
      });

      var lines = graph.map( function (d) {
        var opts = { color: d.type === "Kabel" ? "#50B0F0" : linkScale(d.tq).hex(),
                     weight: 4,
                     opacity: 0.5,
                     dashArray: "none"
                   };

        var line = L.polyline(d.latlngs, opts);

        line.resetStyle = function () {
          line.setStyle(opts);
        };

        line.bindLabel(d.source.node.nodeinfo.hostname + " – " + d.target.node.nodeinfo.hostname + "<br><strong>" + showDistance(d) + " / " + showTq(d) + "</strong>");
        line.on("click", router.link(d));

        dict[d.id] = line;

        return line;
      });

      return lines;
    }

    var iconOnline  = { color: "#1566A9", fillColor: "#1566A9", radius: 6, fillOpacity: 0.5, opacity: 0.5, weight: 2, className: "stroke-first" };
    var iconOffline = { color: "#D43E2A", fillColor: "#D43E2A", radius: 3, fillOpacity: 0.5, opacity: 0.5, weight: 1, className: "stroke-first" };
    var iconLost    = { color: "#D43E2A", fillColor: "#D43E2A", radius: 6, fillOpacity: 0.8, opacity: 0.8, weight: 1, className: "stroke-first" };
    var iconAlert   = { color: "#D43E2A", fillColor: "#D43E2A", radius: 6, fillOpacity: 0.8, opacity: 0.8, weight: 2, className: "stroke-first node-alert" };
    var iconNew     = { color: "#1566A9", fillColor: "#93E929", radius: 6, fillOpacity: 1.0, opacity: 0.5, weight: 2 };

    return function (config, linkScale, sidebar, router, buttons) {
      var self = this;
      var barycenter;
      var groupOnline, groupOffline, groupNew, groupLost, groupLines;
      var savedView;

      var map, userLocation;
      var layerControl;
      var customLayers = {};
      var baseLayers = {};

      var locateUserButton = new LocateButton(function (d) {
        if (d)
          enableTracking();
        else
          disableTracking();
      });

      var mybuttons = [];

      function addButton(button) {
        var el = button.onAdd();
        mybuttons.push(el);
        buttons.appendChild(el);
      }

      function clearButtons() {
        mybuttons.forEach( function (d) {
          buttons.removeChild(d);
        });
      }

      var showCoordsPickerButton = new CoordsPickerButton(function (d) {
        if (d)
          enableCoords();
        else
          disableCoords();
      });

      function saveView() {
        savedView = {center: map.getCenter(),
                     zoom: map.getZoom()};
      }

      function enableTracking() {
        map.locate({watch: true,
                    enableHighAccuracy: true,
                    setView: true
                   });
        locateUserButton.set(true);
      }

      function disableTracking() {
        map.stopLocate();
        locationError();
        locateUserButton.set(false);
      }

      function enableCoords() {
        map.getContainer().classList.add("pick-coordinates");
        map.on("click", showCoordinates);
        showCoordsPickerButton.set(true);
      }

      function disableCoords() {
        map.getContainer().classList.remove("pick-coordinates");
        map.off("click", showCoordinates);
        showCoordsPickerButton.set(false);
      }

      function showCoordinates(e) {
        router.gotoLocation(e.latlng);
        // window.prompt("Koordinaten (Lat, Lng)", e.latlng.lat.toFixed(9) + ", " + e.latlng.lng.toFixed(9))
        disableCoords();
      }

      function locationFound(e) {
        if (!userLocation)
          userLocation = new LocationMarker(e.latlng).addTo(map);

        userLocation.setLatLng(e.latlng);
        userLocation.setAccuracy(e.accuracy);
      }

      function locationError() {
        if (userLocation) {
          map.removeLayer(userLocation);
          userLocation = null;
        }
      }

      function addLayer(layerName) {
        if (layerName in baseLayers)
          return;

        if (layerName in customLayers)
          return;

        try {
          var layer = L.tileLayer.provider(layerName);
          layerControl.addBaseLayer(layer, layerName);
          customLayers[layerName] = layer;

          if (localStorageTest())
            localStorage.setItem("map/customLayers", JSON.stringify(Object.keys(customLayers)));
        } catch (e) {
          console.log(e);
        }
      }

      function contextMenuGotoLocation(e) {
        router.gotoLocation(e.latlng);
      }

      var el = document.createElement("div");
      el.classList.add("map");

      map = L.map(el, options);

      var layers = config.mapLayers.map( function (d) {
        return {
          "name": d.name,
          "layer": "url" in d ? L.tileLayer(d.url, d.config) : L.tileLayer.provider(d.name)
        };
      });

      layers[0].layer.addTo(map);

      layers.forEach( function (d) {
        baseLayers[d.name] = d.layer;
      });

      map.on("locationfound", locationFound);
      map.on("locationerror", locationError);
      map.on("dragend", saveView);
      map.on("contextmenu", contextMenuGotoLocation);

      addButton(locateUserButton);
      addButton(showCoordsPickerButton);

      addButton(new AddLayerButton(function () {
        /*eslint no-alert:0*/
        var layerName = prompt("Leaflet Provider:");
        addLayer(layerName);
      }));

      layerControl = L.control.layers(baseLayers, [], {position: "bottomright"});
      layerControl.addTo(map);

      if (localStorageTest()) {
        var d = JSON.parse(localStorage.getItem("map/customLayers"));

        if (d)
          d.forEach(addLayer);

        d = JSON.parse(localStorage.getItem("map/selectedLayer"));
        d = d && d.name in baseLayers ? baseLayers[d.name] : d && d.name in customLayers ? customLayers[d.name] : false;

        if (d) {
          map.removeLayer(layers[0].layer);
          map.addLayer(d);
        }
      }

      var clientLayer = new ClientLayer({minZoom: 15});
      clientLayer.addTo(map);
      clientLayer.setZIndex(5);

      var labelsLayer = new LabelsLayer({});
      labelsLayer.addTo(map);
      labelsLayer.setZIndex(6);

      map.on("baselayerchange", function(e) {
        map.options.maxZoom = e.layer.options.maxZoom;
        clientLayer.options.maxZoom = map.options.maxZoom;
        labelsLayer.options.maxZoom = map.options.maxZoom;
        if (map.getZoom() > map.options.maxZoom) map.setZoom(map.options.maxZoom);
        if (localStorageTest())
          localStorage.setItem("map/selectedLayer", JSON.stringify({name: e.name}));
      });

      var nodeDict = {};
      var linkDict = {};
      var highlight;

      function resetMarkerStyles(nodes, links) {
        Object.keys(nodes).forEach( function (d) {
          nodes[d].resetStyle();
        });

        Object.keys(links).forEach( function (d) {
          links[d].resetStyle();
        });
      }

      function setView(bounds) {
        map.fitBounds(bounds, {paddingTopLeft: [sidebar(), 0]});
      }

      function resetZoom() {
        if (barycenter)
          setView(barycenter.getBounds());
      }

      function goto(m) {
        var bounds;

        if ("getBounds" in m)
          bounds = m.getBounds();
        else
          bounds = L.latLngBounds([m.getLatLng()]);

        setView(bounds);

        return m;
      }

      function updateView(nopanzoom) {
        resetMarkerStyles(nodeDict, linkDict);
        var m;

        if (highlight !== undefined)
          if (highlight.type === "node") {
            m = nodeDict[highlight.o.nodeinfo.node_id];

            if (m)
              m.setStyle({ color: "orange", weight: 20, fillOpacity: 1, opacity: 0.7, className: "stroke-first" });
          } else if (highlight.type === "link") {
            m = linkDict[highlight.o.id];

            if (m)
              m.setStyle({ weight: 7, opacity: 1, dashArray: "10, 10" });
          }

        if (!nopanzoom)
          if (m)
            goto(m);
          else if (savedView)
            map.setView(savedView.center, savedView.zoom);
          else
            resetZoom();
      }

      function calcBarycenter(nodes) {
        nodes = nodes.map(function (d) { return d.nodeinfo.location; });

        if (nodes.length === 0)
          return undefined;

        var lats = nodes.map(function (d) { return d.latitude; });
        var lngs = nodes.map(function (d) { return d.longitude; });

        var barycenter = L.latLng(d3.median(lats), d3.median(lngs));
        var barycenterDev = [d3.deviation(lats), d3.deviation(lngs)];

        if (barycenterDev[0] === undefined)
          barycenterDev[0] = 0;

        if (barycenterDev[1] === undefined)
          barycenterDev[1] = 0;

        var barycenterCircle = L.latLng(barycenter.lat + barycenterDev[0],
                                        barycenter.lng + barycenterDev[1]);

        var r = barycenter.distanceTo(barycenterCircle);

        return L.circle(barycenter, r * config.mapSigmaScale);
      }

      function mapRTree(d) {
        var o = [ d.nodeinfo.location.latitude, d.nodeinfo.location.longitude,
                  d.nodeinfo.location.latitude, d.nodeinfo.location.longitude];

        o.node = d;

        return o;
      }

      self.setData = function (data) {
        nodeDict = {};
        linkDict = {};

        if (groupOffline)
          groupOffline.clearLayers();

        if (groupOnline)
          groupOnline.clearLayers();

        if (groupNew)
          groupNew.clearLayers();

        if (groupLost)
          groupLost.clearLayers();

        if (groupLines)
          groupLines.clearLayers();

        var lines = addLinksToMap(linkDict, linkScale, data.graph.links, router);
        groupLines = L.featureGroup(lines).addTo(map);

        if (typeof config.fixedCenter === "undefined")
          barycenter = calcBarycenter(data.nodes.all.filter(has_location));
        else
          barycenter = L.circle(L.latLng(new L.LatLng(config.fixedCenter.lat, config.fixedCenter.lng)), config.fixedCenter.radius * 1000);

        var nodesOnline = subtract(data.nodes.all.filter(online), data.nodes.new);
        var nodesOffline = subtract(data.nodes.all.filter(offline), data.nodes.lost);

        var markersOnline = nodesOnline.filter(has_location)
          .map(mkMarker(nodeDict, function () { return iconOnline; }, router));

        var markersOffline = nodesOffline.filter(has_location)
          .map(mkMarker(nodeDict, function () { return iconOffline; }, router));

        var markersNew = data.nodes.new.filter(has_location)
          .map(mkMarker(nodeDict, function () { return iconNew; }, router));

        var markersLost = data.nodes.lost.filter(has_location)
          .map(mkMarker(nodeDict, function (d) {
            if (d.lastseen.isAfter(moment(data.now).subtract(3, "days")))
              return iconAlert;

            return iconLost;
          }, router));

        groupOffline = L.featureGroup(markersOffline).addTo(map);
        groupOnline = L.featureGroup(markersOnline).addTo(map);
        groupLost = L.featureGroup(markersLost).addTo(map);
        groupNew = L.featureGroup(markersNew).addTo(map);

        var rtreeOnlineAll = rbush(9);

        rtreeOnlineAll.load(data.nodes.all.filter(online).filter(has_location).map(mapRTree));

        clientLayer.setData(rtreeOnlineAll);
        labelsLayer.setData({online: nodesOnline.filter(has_location),
                             offline: nodesOffline.filter(has_location),
                             new: data.nodes.new.filter(has_location),
                             lost: data.nodes.lost.filter(has_location)
                            });

        updateView(true);
      };

      self.resetView = function () {
        disableTracking();
        highlight = undefined;
        updateView();
      };

      self.gotoNode = function (d) {
        disableTracking();
        highlight = {type: "node", o: d};
        updateView();
      };

      self.gotoLink = function (d) {
        disableTracking();
        highlight = {type: "link", o: d};
        updateView();
      };

      self.gotoLocation = function () {
        //ignore
      };

      self.destroy = function () {
        clearButtons();
        map.remove();

        if (el.parentNode)
          el.parentNode.removeChild(el);
      };

      self.render = function (d) {
        d.appendChild(el);
        map.invalidateSize();
      };

      return self;
    };
});