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Analysis.ts
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Analysis.ts
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import { isAnyArray } from 'is-any-array';
import {
xIsMonotonic,
xMinValue,
xMaxValue,
stringify,
} from 'ml-spectra-processing';
import type { SpectrumVariables, Spectrum } from './types/Cheminfo';
import { NormalizedSpectrumOptions } from './types/NormalizedSpectrumOptions';
import { SpectrumSelector } from './types/SpectrumSelector';
import { getNormalizedSpectrum } from './util/getNormalizedSpectrum';
import { getXYSpectra } from './util/getXYSpectra';
import { getXYSpectrum } from './util/getXYSpectrum';
type SpectrumCallback = (variables: SpectrumVariables) => SpectrumVariables;
interface AnalysisOptions {
id?: string;
label?: string;
spectrumCallback?: SpectrumCallback;
}
export interface NormalizedOptions {
normalization?: NormalizedSpectrumOptions;
selector?: SpectrumSelector;
}
/**
* Class allowing to store and manipulate an analysis.
* An analysis may contain one or more spectra that can be selected
* based on their units
*/
export class Analysis {
public id: string;
public label: string;
public spectrumCallback: SpectrumCallback | undefined;
public spectra: Spectrum[];
private cache: {
spectrum: Record<string, Spectrum | undefined>;
spectra: Record<string, Spectrum[]>;
};
public constructor(options: AnalysisOptions = {}) {
this.id = options.id || Math.random().toString(36).slice(2, 10);
this.label = options.label || this.id;
this.spectrumCallback = options.spectrumCallback;
this.spectra = [];
this.cache = { spectrum: {}, spectra: {} };
}
public clone({ filter = {} }: { filter: { ids?: string[] } }) {
const { ids } = filter;
const analysis = new Analysis();
analysis.id = this.id;
analysis.label = this.label;
analysis.spectrumCallback = this.spectrumCallback;
analysis.spectra = this.spectra.filter((spectrum) => {
//@ts-expect-error spectrum.id is not expected to be undefined at this level
return !ids || ids.includes(spectrum.id);
});
return analysis;
}
public toJSON() {
// TODO this is likely not the most optimized way to remove typedArray
// if data are small seems still reasonable
return {
id: this.id,
label: this.label,
spectra: JSON.parse(stringify(this.spectra)),
};
}
public static fromJSON(json: any) {
const analysis = new Analysis();
analysis.id = json.id;
analysis.label = json.label;
analysis.spectra = json.spectra;
return analysis;
}
/**
* Add a spectrum in the internal spectra variable
* @param variables
* @param options
*/
public pushSpectrum(
variables: SpectrumVariables,
options: Omit<Spectrum, 'variables'> = {},
) {
this.spectra.push(
standardizeData(variables, options, {
spectrumCallback: this.spectrumCallback,
}),
);
this.cache = { spectrum: {}, spectra: {} };
}
/**
* Retrieve a Spectrum based on x/y units
* @param selector
*/
public getXYSpectrum(selector: SpectrumSelector = {}) {
const id = JSON.stringify(selector);
if (!this.cache.spectrum[id]) {
this.cache.spectrum[id] = getXYSpectrum(this.spectra, selector);
}
return this.cache.spectrum[id];
}
/**
* Retrieve spectra matching selector
* @param selector
*/
public getXYSpectra(selector: SpectrumSelector = {}) {
const id = JSON.stringify(selector);
if (!this.cache.spectra[id]) {
this.cache.spectra[id] = getXYSpectra(this.spectra, selector);
}
return this.cache.spectra[id];
}
/**
* Retrieve a xy object
* @param selector.units - Units separated by vs like for example "g vs °C"
* @param selector.xUnits - if undefined takes the first variable
* @param selector.yUnits - if undefined takes the second variable
* @param selector
*/
public getXY(selector: SpectrumSelector = {}) {
const spectrum = this.getXYSpectrum(selector);
if (!spectrum) return undefined;
return {
x: spectrum.variables.x.data,
y: spectrum.variables.y.data,
};
}
/**
* Return the data object for specific x/y units with possibly some
* normalization options
* @param options.selector.xUnits - // if undefined takes the first variable
* @param options.selector.yUnits - // if undefined takes the second variable
* @param options
*/
public getNormalizedSpectrum(options: NormalizedOptions = {}) {
const { normalization, selector } = options;
const spectrum = this.getXYSpectrum(selector);
if (!spectrum) return undefined;
return getNormalizedSpectrum(spectrum, normalization);
}
/**
* @param options
*/
public getNormalizedSpectra(options: NormalizedOptions = {}): Spectrum[] {
const { normalization, selector } = options;
const spectra = this.getXYSpectra(selector);
if (spectra.length === 0) return [];
const normalizedSpectra = [];
for (const spectrum of spectra) {
normalizedSpectra.push(getNormalizedSpectrum(spectrum, normalization));
}
return normalizedSpectra;
}
/**
* Returns the first spectrum. This method could be improved in the future
* @returns
*/
public getSpectrum() {
return this.spectra[0];
}
/**
* Returns the xLabel
* @param selector.xUnits - // if undefined takes the first variable
* @param selector.yUnits - // if undefined takes the second variable
* @param selector
*/
public getXLabel(selector: SpectrumSelector) {
return this.getXYSpectrum(selector)?.variables.x.label;
}
/**
* Returns the yLabel
* @param selector.xUnits - // if undefined takes the first variable
* @param selector.yUnits - // if undefined takes the second variable
* @param selector
*/
public getYLabel(selector: SpectrumSelector) {
return this.getXYSpectrum(selector)?.variables.y.label;
}
}
/**
* Internal function that ensure the order of x / y array
* @param variables
* @param options
* @param analysisOptions
*/
function standardizeData(
variables: SpectrumVariables,
options: Omit<Spectrum, 'variables'>,
analysisOptions: Pick<AnalysisOptions, 'spectrumCallback'>,
) {
const {
meta = {},
dataType = '',
title = '',
id = Math.random().toString(36).replace('0.', ''),
} = options;
const { spectrumCallback } = analysisOptions;
if (spectrumCallback) {
spectrumCallback(variables);
}
const xVariable = variables.x;
const yVariable = variables.y;
if (!xVariable || !yVariable) {
throw new Error('A spectrum must contain at least x and y variables');
}
if (!isAnyArray(xVariable.data) || !isAnyArray(yVariable.data)) {
throw new Error('x and y variables must contain an array data');
}
const x = xVariable.data;
const reverse = x && x.length > 1 && x[0] > (x.at(-1) as number);
for (const [key, variable] of Object.entries(variables)) {
if (reverse) variable.data = variable.data.slice().reverse();
variable.label = variable.label || key;
if (variable.label.match(/^.*[([](?<units>.*)[)\]].*$/)) {
const units = variable.label.replace(
/^.*[([](?<units>.*)[)\]].*$/,
'$<units>',
);
if (!variable.units || variable.units === units) {
variable.units = units;
variable.label = variable.label.replace(/[([].*[)\]]/, '').trim();
}
}
variable.min = xMinValue(variable.data);
variable.max = xMaxValue(variable.data);
variable.isMonotone = xIsMonotonic(variable.data) !== 0;
}
return {
variables,
title,
dataType,
meta,
id,
};
}