@equinor/fusion-observable/dist/esm/is-observable-input.js

WIP

import { isObservable } from 'rxjs';
// biome-ignore lint/suspicious/noExplicitAny: Should allow any input type
export function isObservableInput(input) {
    // Check for null or undefined
    if (input === null || input === undefined) {
        return false;
    }
    // Check for primitive string values (not ObservableInput)
    if (typeof input === 'string') {
        return false;
    }
    // Check if input is an RxJS Observable
    if (isObservable(input)) {
        return true;
    }
    // Check for InteropObservable (has Symbol.observable)
    if (typeof input[Symbol.observable] === 'function') {
        return true; // InteropObservable<T>
    }
    // Check for AsyncIterable (has Symbol.asyncIterator)
    if (typeof input[Symbol.asyncIterator] === 'function') {
        return true; // AsyncIterable<T>
    }
    // Check for PromiseLike (has then function)
    if (typeof input.then === 'function') {
        return true; // PromiseLike<T>
    }
    // Check for ArrayLike (object with length property)
    if (typeof input === 'object' && typeof input.length === 'number') {
        return true; // ArrayLike<T>
    }
    // Check for Iterable (has Symbol.iterator)
    if (typeof input[Symbol.iterator] === 'function') {
        return true; // Iterable<T>
    }
    // Check for ReadableStreamLike (has getReader function)
    if (typeof input.getReader === 'function') {
        return true; // ReadableStreamLike<T>
    }
    return false;
}
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