PaginationTraverser.js

PaginationTraverser.js

// Get all records from { page, limit } style pagination
// NOTE: this class assumes that the first page value is 1 (NOT 0)
// Tweak the class if your system begins pagination with page 0.

class PaginationTraverser {
    constructor({ limit, getPage }){
        // Limit must not exceed server's clamp range or this breaks
        // very badly (infinite while loop)
        this.limit = limit
        this.getPage = getPage
    }
    async getAll(){
        const allItems = []
        let page = 0
        let pageItems = []
        async function loadMore(){
            page++
            pageItems = await getPage(page)
            pageItems.forEach(e => allItems.push(e))
        }
        await loadMore()
        while(pageItems.length == this.limit){
            await loadMore()
        }
        return allItems
    }
}