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import 'vtk.js/Sources/Common/DataModel/ImageData';
import 'vtk.js/Sources/Common/DataModel/PolyData';
import vtk from 'vtk.js/Sources/vtk';
import macro from 'vtk.js/Sources/macros';
import DataAccessHelper from 'vtk.js/Sources/IO/Core/DataAccessHelper';
import HttpDataSetReader from '../HttpDataSetReader';
// Enable data soure for DataAccessHelper
import 'vtk.js/Sources/IO/Core/DataAccessHelper/LiteHttpDataAccessHelper'; // Just need HTTP
// import 'vtk.js/Sources/IO/Core/DataAccessHelper/HttpDataAccessHelper'; // HTTP + zip
// import 'vtk.js/Sources/IO/Core/DataAccessHelper/HtmlDataAccessHelper'; // html + base64 + zip
// import 'vtk.js/Sources/IO/Core/DataAccessHelper/JSZipDataAccessHelper'; // zip
const HTTP_DATA_ACCESS = DataAccessHelper.get('http');
// ----------------------------------------------------------------------------
// Global methods
// ----------------------------------------------------------------------------
function processDataSet(publicAPI, model, dataset, resolve, reject, loadData) {
model.readers = [];
const pendingPromises = [];
dataset.series.forEach((timeStep) => {
const newReader = HttpDataSetReader.newInstance({
fetchGzip: model.fetchGzip,
dataAccessHelper: model.dataAccessHelper,
});
pendingPromises.push(
newReader.setUrl(`${model.baseURL}/${timeStep.url}`, { loadData })
);
model.readers.push({
timeStep: timeStep.timeStep,
reader: newReader,
});
});
return Promise.all(pendingPromises).then(
() => {
const range = publicAPI.getTimeRange();
if (range && range.length !== 0) {
publicAPI.setUpdateTimeStep(range[0]);
}
resolve(publicAPI);
},
(error) => {
reject(error);
}
);
}
// ----------------------------------------------------------------------------
// vtkHttpDataSetSeriesReader methods
// ----------------------------------------------------------------------------
function vtkHttpDataSetSeriesReader(publicAPI, model) {
// Set our className
model.classHierarchy.push('vtkHttpDataSetSeriesReader');
// Empty output by default
model.output[0] = vtk({ vtkClass: 'vtkPolyData' });
// Create default dataAccessHelper if not available
if (!model.dataAccessHelper) {
model.dataAccessHelper = HTTP_DATA_ACCESS;
}
model.currentReader = null;
publicAPI.updateMetaData = (loadData = false) => {
if (model.compression === 'zip') {
return new Promise((resolve, reject) => {
HTTP_DATA_ACCESS.fetchBinary(model.baseURL).then((zipContent) => {
model.dataAccessHelper = DataAccessHelper.get('zip', {
zipContent,
callback: (zip) => {
model.baseURL = '';
model.dataAccessHelper.fetchJSON(publicAPI, 'index.json').then(
(dataset) => {
processDataSet(
publicAPI,
model,
dataset,
resolve,
reject,
loadData
);
},
(error) => {
reject(error);
}
);
},
});
});
});
}
return new Promise((resolve, reject) => {
model.dataAccessHelper.fetchJSON(publicAPI, model.url).then(
(dataset) =>
processDataSet(publicAPI, model, dataset, resolve, reject, loadData),
(error) => {
reject(error);
}
);
});
};
publicAPI.setUrl = (url, options = {}) => {
if (!url.endsWith('index.json') && !options.fullpath) {
model.baseURL = url;
model.url = `${url}/index.json`;
} else {
model.url = url;
// Remove the file in the URL
const path = url.split('/');
path.pop();
model.baseURL = path.join('/');
}
model.compression = options.compression;
return publicAPI.updateMetaData(options.loadData);
};
publicAPI.getTimeSteps = () =>
model.readers.map((reader) => reader.timeStep).sort();
publicAPI.getTimeRange = () => {
const timeSteps = publicAPI.getTimeSteps();
const length = timeSteps.length;
if (length >= 1) {
return [timeSteps[0], timeSteps[length - 1]];
}
return [];
};
publicAPI.setUpdateTimeStep = (timeStep) => {
const reader = model.readers.reduce((newReader, currentReader) => {
if (currentReader.timeStep <= timeStep) {
return currentReader;
}
return newReader;
});
if (reader === undefined) {
return;
}
model.currentReader = reader.reader;
model.output[0] = model.currentReader.getOutputData();
model.output[0].modified();
publicAPI.modified();
};
publicAPI.requestData = (inData, outData) => {
if (model.currentReader) {
outData[0] = model.currentReader.getOutputData();
}
};
// Toggle arrays to load
publicAPI.enableArray = (location, name, enable = true) => {
if (model.currentReader) {
model.currentReader.reader.enableArray(location, name, enable);
}
};
publicAPI.loadData = () => {
if (model.currentReader) {
model.currentReader.reader.loadData();
}
};
}
// ----------------------------------------------------------------------------
// Object factory
// ----------------------------------------------------------------------------
const DEFAULT_VALUES = {
fetchGzip: false,
url: null,
baseURL: null,
dataAccessHelper: null,
};
// ----------------------------------------------------------------------------
export function extend(publicAPI, model, initialValues = {}) {
Object.assign(model, DEFAULT_VALUES, initialValues);
// Build VTK API
macro.obj(publicAPI, model);
macro.get(publicAPI, model, ['url', 'baseURL']);
macro.set(publicAPI, model, ['dataAccessHelper']);
macro.algo(publicAPI, model, 0, 1);
// Object methods
vtkHttpDataSetSeriesReader(publicAPI, model);
}
// ----------------------------------------------------------------------------
export const newInstance = macro.newInstance(
extend,
'vtkHttpDataSetSeriesReader'
);
// ----------------------------------------------------------------------------
export default { newInstance, extend };
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