private loadDataFromVisualUpdate()

in packages/attribute-slicer-powerbi/src/AttributeSlicerVisual.ts [258:333]
56 lines of code
11 McCabe index (conditional complexity)

	private loadDataFromVisualUpdate(
		isDataLoad: boolean,
		dv: powerbiVisualsApi.DataView,
		pbiState: AttributeSlicerVisualState,
	) {
		// Load data if the data has definitely changed, sometimes however it hasn't actually changed
		// ie search for Microsof then Microsoft
		if (dv) {
			if (this.shouldLoadDataIntoSlicer(pbiState, isDataLoad)) {
				const data = this.convertData(dv, pbiState);
				log("Loading data from PBI");

				this.data = data;
				const filteredData = this.data.items.slice(0);

				// If we are appending data for the attribute slicer
				if (
					this.loadDeferred &&
					this.mySlicer.data &&
					!this.loadDeferred.search
				) {
					// we only need to give it the new items
					this.loadDeferred.resolve(
						filteredData.slice(this.mySlicer.data.length),
					);
					delete this.loadDeferred;

					// Recompute the rendered values, cause otherwise only half will have the updated values
					// because the min/max of all the columns change when new data is added.
					computeRenderedValues(<any>this.mySlicer.data);

					this.mySlicer.refresh();
				} else {
					this.mySlicer.data = filteredData;

					// Restore selection
					this.mySlicer.selectedItems = (pbiState.selectedItems || []).slice(0); // Make a copy

					delete this.loadDeferred;
				}

				const columnNames: string[] = [];
				lodashForown(
					lodashGet(dv, "categorical.categories"),
					(value, key: any) => {
						columnNames.push(value.source.queryName);
					},
				);

				// Only clear selection IF
				// We've already loaded a dataset, and the user has changed the dataset to something else
				if (
					this.currentCategory &&
					!lodashIsequal(this.currentCategory, columnNames)
				) {
					// This will really be undefined behaviour for pbi-stateful
					// because this indicates the user changed datasets
					if (!lodashIsequal(pbiState.selectedItems, [])) {
						log("Clearing Selection, Categories Changed");
						pbiState.selectedItems = [];
						this.onSelectionChanged([]);
					}
					if (pbiState.searchText !== "") {
						log("Clearing Search, Categories Changed");
						pbiState.searchText = "";
						this.onSearchPerformed("");
					}
				}

				this.currentCategory = columnNames;
			}
		} else {
			this.mySlicer.data = [];
			pbiState.selectedItems = [];
		}
	}