From 6d97d7949881e52536d750029566f0019fb6763e Mon Sep 17 00:00:00 2001
From: Georgii Savin <gsavin@devexperts.com>
Date: Thu, 5 Oct 2023 17:06:47 +0300
Subject: [PATCH] fix: rework PrependedCandlesData interface

---
 src/chart/components/chart/chart-base.model.ts  |  3 +--
 src/chart/components/chart/chart.model.ts       | 15 +++++++--------
 src/chart/components/x_axis/x-axis.component.ts |  6 +++---
 3 files changed, 11 insertions(+), 13 deletions(-)

diff --git a/src/chart/components/chart/chart-base.model.ts b/src/chart/components/chart/chart-base.model.ts
index 7dc12255..0d266dc3 100644
--- a/src/chart/components/chart/chart-base.model.ts
+++ b/src/chart/components/chart/chart-base.model.ts
@@ -18,8 +18,7 @@ type DataPoint<T extends BaseType> = T extends 'candle' ? Candle : DataSeriesPoi
 type VisualPoint<T extends BaseType> = T extends 'candle' ? VisualCandle : VisualSeriesPoint;
 export interface PrependedCandlesData {
 	prependedCandlesWidth: number;
-	prependedCandlesCount: number;
-	preparedCandles: Candle[];
+	prependedCandles: Candle[];
 }
 
 /**
diff --git a/src/chart/components/chart/chart.model.ts b/src/chart/components/chart/chart.model.ts
index 870d5bdb..74fc8a0f 100755
--- a/src/chart/components/chart/chart.model.ts
+++ b/src/chart/components/chart/chart.model.ts
@@ -384,13 +384,12 @@ export class ChartModel extends ChartBaseElement {
 
 		// caclulate offset width for prepanded candles
 		const prependedCandlesWidth = this.chartBaseModel.mainVisualPoints
-			.slice(0, updateResult.prepended)
+			.slice(0, updateResult.prepended.length)
 			.reduce((acc, cur) => acc + cur.width, 0);
 		this.scale.moveXStart(this.scale.xStart + prependedCandlesWidth);
 		this.candlesPrependSubject.next({
 			prependedCandlesWidth,
-			prependedCandlesCount: updateResult.prepended,
-			preparedCandles,
+			prependedCandles: updateResult.prepended,
 		});
 
 		this.chartBaseModel.recalculatePeriod();
@@ -1065,7 +1064,7 @@ export class ChartModel extends ChartBaseElement {
 		});
 
 		return {
-			prepended: prepend.length,
+			prepended: prepend,
 			candles: [...prepend, ...targetCopy],
 		};
 	}
@@ -1111,8 +1110,8 @@ export class ChartModel extends ChartBaseElement {
 }
 
 export interface UpdateCandlesResult {
-	prepended: number;
-	appended?: number;
+	prepended: Candle[];
+	appended?: Candle[];
 	candles: Candle[];
 }
 
@@ -1161,8 +1160,8 @@ const updateCandles = (target: Candle[], update: Candle[]): UpdateCandlesResult
 	});
 
 	return {
-		prepended: prepend.length,
-		appended: append.length,
+		prepended: prepend,
+		appended: append,
 		candles: [...prepend, ...targetCopy, ...append],
 	};
 };
diff --git a/src/chart/components/x_axis/x-axis.component.ts b/src/chart/components/x_axis/x-axis.component.ts
index dd4ddd32..076dd1b7 100644
--- a/src/chart/components/x_axis/x-axis.component.ts
+++ b/src/chart/components/x_axis/x-axis.component.ts
@@ -120,11 +120,11 @@ export class XAxisComponent extends ChartBaseElement {
 		this.addRxSubscription(
 			this.chartComponent.chartModel.candlesPrependSubject
 				.pipe(
-					filter(({ prependedCandlesCount }) => prependedCandlesCount !== 0),
-					map(({ prependedCandlesCount }) => {
+					filter(({ prependedCandles }) => prependedCandles.length !== 0),
+					map(({ prependedCandles }) => {
 						return this.chartComponent.chartModel.mainCandleSeries.visualPoints.slice(
 							0,
-							prependedCandlesCount,
+							prependedCandles.length,
 						);
 					}),
 				)