@trap_stevo/legendarybuilderpronodejs-utilities/dist/cjs/HUDComponents/ContainerArray.js

The legendary computational utility API that makes your application a legendary application. ~ Created by Steven Compton

class ContainerArray 
{
    constructor(pageSize = 100) 
    {
         this.pageSize = pageSize;
         
         this.pages = [];
         
         this.totalItems = 0;
    }
    
    add(item) 
    {
         if (this.pages.length === 0 || this.pages[this.pages.length - 1].length === this.pageSize) 
         {
              this.pages.push([]);
         }
         
         this.pages[this.pages.length - 1].push(item);
         
         this.totalItems++;
    }
    
    getItem(index) 
    {
         if (index < 0 || index >= this.totalItems) 
         {
              return undefined;
         }
         
         const pageIndex = Math.floor(index / this.pageSize);
         
         const itemIndex = index % this.pageSize;
         
         return this.pages[pageIndex] ? this.pages[pageIndex][itemIndex] : undefined;
    }
    
    reverseForEachPage(callback) 
    {
         let count = 0;
         
         for (let pageIndex = 0; pageIndex < this.pages.length; pageIndex++) 
         {
              const page = this.pages[pageIndex];
              
              for (let i = page.length - 1; i >= 0; i--) 
              {
                   callback(page[i], i, pageIndex, count++);
              }
         }
    }
    
    reverseForEach(callback)
    {
         let count = this.totalItems - 1;
         
         for (let pageIndex = this.pages.length - 1; pageIndex >= 0; pageIndex--) 
         {
              const page = this.pages[pageIndex];
              
              for (let i = page.length - 1; i >= 0; i--) 
              {
                   callback(page[i], i, pageIndex, count--);
              }
         }
    }
    
    getPaginatedData(page, limit) 
    {
         const startIndex = page * limit;
         
         const endIndex = startIndex + limit;
         
         const result = [];
         
         for (let i = startIndex; i < endIndex && i < this.totalItems; i++) 
         {
              result.push(this.getItem(i));
         }
         
         return result;
    }
    
    forEach(callback) 
    {
         let count = 0;
         
         for (let pageIndex = 0; pageIndex < this.pages.length; pageIndex++)
         {
              const page = this.pages[pageIndex];
              
              for (let i = 0; i < page.length; i++) 
              {
                   callback(page[i], count++);
              }
         }
    }
    
    get totalPages() 
    {
         return this.pages.length;
    }
    
    get length() 
    {
         return this.totalItems;
    }
}

module.exports = ContainerArray;