X-Git-Url: https://git.piment-noir.org/?a=blobdiff_plain;f=src%2Futils%2FCircularArray.ts;h=08a37220c1469e255873ab06482a3193b4c25d87;hb=9d73266c8bb85d7e2bc1fab9954a76910fd689eb;hp=e7edb3dd13e1a895883f0a24600dc774df540451;hpb=e795a78752a41fe21702ecaee737170fd8e2a1fd;p=e-mobility-charging-stations-simulator.git

diff --git a/src/utils/CircularArray.ts b/src/utils/CircularArray.ts
index e7edb3dd..08a37220 100644
--- a/src/utils/CircularArray.ts
+++ b/src/utils/CircularArray.ts
@@ -1,36 +1,87 @@
+// Copyright Jerome Benoit. 2021. All Rights Reserved.
 
-export default class CircularArray<T> extends Array<T> {
+export const DEFAULT_CIRCULAR_ARRAY_SIZE = Number.MAX_SAFE_INTEGER;
+
+/**
+ * Array with a maximum length shifting items when full.
+ */
+export class CircularArray<T> extends Array<T> {
   public size: number;
-  private readonly maximumCircularArraySize = 2000;
 
-  constructor(size?: number) {
+  constructor(size: number = DEFAULT_CIRCULAR_ARRAY_SIZE, ...items: T[]) {
     super();
-    this.size = size && size <= this.maximumCircularArraySize ? size : this.maximumCircularArraySize;
+    this.checkSize(size);
+    this.size = size;
+    if (arguments.length > 1) {
+      this.push(...items);
+    }
   }
 
-  push(...items: T[]): number {
-    if (this.length + items.length > this.size) {
-      super.splice(0, (this.length + items.length) - this.size);
+  public push(...items: T[]): number {
+    const length = super.push(...items);
+    if (length > this.size) {
+      super.splice(0, length - this.size);
     }
-    return super.push(...items);
+    return this.length;
   }
 
-  unshift(...items: T[]): number {
-    if (this.length + items.length > this.size) {
-      super.splice(this.size - items.length, (this.length + items.length) - this.size);
+  public unshift(...items: T[]): number {
+    const length = super.unshift(...items);
+    if (length > this.size) {
+      super.splice(this.size, items.length);
     }
-    return super.unshift(...items);
+    return this.length;
   }
 
-  concat(...items: (T|ConcatArray<T>)[]): T[] {
-    if (this.length + items.length > this.size) {
-      super.splice(0, (this.length + items.length) - this.size);
+  public concat(...items: (T | ConcatArray<T>)[]): CircularArray<T> {
+    const concatenatedCircularArray = super.concat(items as T[]) as CircularArray<T>;
+    concatenatedCircularArray.size = this.size;
+    if (concatenatedCircularArray.length > concatenatedCircularArray.size) {
+      concatenatedCircularArray.splice(
+        0,
+        concatenatedCircularArray.length - concatenatedCircularArray.size
+      );
     }
-    return super.concat(items as T[]);
+    return concatenatedCircularArray;
   }
 
-  splice(start: number, deleteCount?: number, ...items: T[]): T[] {
-    this.push(...items);
-    return super.splice(start, deleteCount);
+  public splice(start: number, deleteCount?: number, ...items: T[]): T[] {
+    let itemsRemoved: T[];
+    if (arguments.length >= 3 && typeof deleteCount !== 'undefined') {
+      itemsRemoved = super.splice(start, deleteCount);
+      // FIXME: that makes the items insert not in place
+      this.push(...items);
+    } else if (arguments.length === 2) {
+      itemsRemoved = super.splice(start, deleteCount);
+    } else {
+      itemsRemoved = super.splice(start);
+    }
+    return itemsRemoved;
+  }
+
+  public resize(size: number): void {
+    this.checkSize(size);
+    if (size === 0) {
+      this.length = 0;
+    } else if (size < this.size) {
+      for (let i = size; i < this.size; i++) {
+        super.pop();
+      }
+    }
+    this.size = size;
+  }
+
+  public empty(): boolean {
+    return this.length === 0;
+  }
+
+  public full(): boolean {
+    return this.length === this.size;
+  }
+
+  private checkSize(size: number) {
+    if (size < 0) {
+      throw new RangeError('Invalid circular array size');
+    }
   }
 }