ractive-ez-table/lib/TableIterator.js

Ractive Ez UI Table

class ItemIterator {

    constructor(items) {
        this.index = 0;
        this.items = items;
    };

    end() {
        return this.index >= this.items.length;
    };

    next() {
        return this.items[this.index++];
    }

};

class GroupIterator {

    constructor(groups) {
        this.index = 0;
        this.groups = groups;
        this.currentIterator = this.nextIterator();
    }

    end() {
        return (this.currentIterator == null)
            || (this.currentIterator.end() && this.index >= this.groups.length);
    }

    nextIterator() {
        const group = this.groups[this.index++];
        if (group == null) return null;

        return group.subGroups
            ? new GroupIterator(group.subGroups)
            : new ItemIterator(group.items);
    }

    next() {
        if (this.currentIterator.end()) this.currentIterator = this.nextIterator();
        return this.currentIterator.next();
    }

}

class TableIterator {

    constructor(table) {
		const root = table.get("_root");
		
        this.table = table;
        this.iterator = root.subGroups
            ? new GroupIterator(root.subGroups)
            : new ItemIterator(root.items);
    }

    end() {
        return this.iterator.end();
    }

    next() {
        return this.iterator.next();
    }

}

export default TableIterator;