shouldContinueFunction(xyzSource, function(err, keepGoing) {
if (!keepGoing) {
zoom++;
return zoomLevelDone();
}
console.log("Continuing to create zoom level " + zoom);
var yRange = xyzTileUtils.yCalculator(extent, zoom);
var xRange = xyzTileUtils.xCalculator(extent, zoom);
var currentx = xRange.min;
async.doWhilst(
function(xRowDone) {
getXRow(xyzSource, currentx, yRange, zoom, xRowDone, downloadTile, shouldContinueFunction);
},
function (stop) {
console.log("x row " + currentx + " is done");
currentx++;
return currentx <= xRange.max && !stop;
},
function () {
console.log("Zoom level " + zoom + " is complete.");
zoomLevelCompleteFunction(xyzSource, zoom, function() {
zoom++;
zoomLevelDone();
});
}
);
});
exports.createXYZTiles = function(xyzSource, minZoom, maxZoom, downloadTile, shouldContinueFunction, zoomLevelCompleteFunction, callback) {
xyzSource.status.zoomLevelStatus = xyzSource.status.zoomLevelStatus || [];
var extent = turf.extent(xyzSource.geometry);
extent[0] = Math.max(-180, extent[0]);
extent[1] = Math.max(-85, extent[1]);
extent[2] = Math.min(180, extent[2]);
extent[3] = Math.min(85, extent[3]);
console.log('extent', extent);
var totalXYZTiles = 0;
for (var zoom = minZoom; zoom <= maxZoom; zoom++) {
var yRange = xyzTileUtils.yCalculator(extent, zoom);
var xRange = xyzTileUtils.xCalculator(extent, zoom);
console.log('zoom level %d yRange', zoom, yRange);
console.log('zoom level %d xRange', zoom, xRange);
var totalTiles = (1 + (yRange.max - yRange.min)) * (1 + (xRange.max - xRange.min));
totalXYZTiles += totalTiles;
xyzSource.status.zoomLevelStatus[zoom] = xyzSource.status.zoomLevelStatus[zoom] || {
complete: false,
totalTiles: totalTiles,
generatedTiles: 0
};
if (xyzSource.status.zoomLevelStatus[zoom].complete) {
xyzSource.status.zoomLevelStatus[zoom].generatedTiles = totalTiles;
}
}
xyzSource.markModified('status.zoomLevelStatus');
xyzSource.status.totalTiles = totalXYZTiles;
xyzSource.save(function() {
var zoom = minZoom;
async.whilst(
function (stop) {
return zoom <= maxZoom && !stop;
},
function (zoomLevelDone) {
console.log("Starting zoom level " + zoom);
shouldContinueFunction(xyzSource, function(err, keepGoing) {
if (!keepGoing) {
zoom++;
return zoomLevelDone();
}
console.log("Continuing to create zoom level " + zoom);
var yRange = xyzTileUtils.yCalculator(extent, zoom);
var xRange = xyzTileUtils.xCalculator(extent, zoom);
var currentx = xRange.min;
async.doWhilst(
function(xRowDone) {
getXRow(xyzSource, currentx, yRange, zoom, xRowDone, downloadTile, shouldContinueFunction);
},
function (stop) {
console.log("x row " + currentx + " is done");
currentx++;
return currentx <= xRange.max && !stop;
},
function () {
console.log("Zoom level " + zoom + " is complete.");
zoomLevelCompleteFunction(xyzSource, zoom, function() {
zoom++;
zoomLevelDone();
});
}
);
});
},
function (err) {
console.log("done with all the zoom levels");
callback(err, xyzSource);
}
);
});
}