/*  DokuWiki MoaiEditor Localstorage.js file
    Version : 0.5a (May 6, 2026)
    Author  : MoaiTools <info@moaitools.org>
    License : GPL 3 (http://www.gnu.org/licenses/gpl.html) */

/*  Storage of client-side user settings.
    
    Users:
        - Button.storage            -- button mode/state    valid: list of mode names        
        - Buttons.dividerPos        -- divider position     valid: [0,5,10,15,20,25,30,35,40,45,50,55,60,65,70,75,80,85,90,95,100]
        - Editor._index             -- index of editor      valid: integer (handles invalid indexes by itself, even negative ones)
        - Toc.depthValue            -- Toc depth            valid: [2,3,4,5]
        - Main.enabled              -- editor enabled       valid: ['on','off']
        - Main.isHidden             -- editor hidden        valid: [0,1] 
        - Layout.linewrap           -- editor linewrap      valid: ['off','soft']
*/
MoaiEditor.LocalStorage = class {

    constructor(varname, deflt=null, valid=null) {
        this.varname = DOKU_BASE+'__dokuwiki__moaied__'+varname;
        this.default = deflt;
        this.valid = valid;
    }
    // ┌───────────────────────────────────┐
    // │ Public                            │
    // └───────────────────────────────────┘
    set value(value) {
        if (this.localStorageFailed())
            return null;
        localStorage.setItem(this.varname, value);
    }
    // ──────────────────────────────────── 
    get value() {
        if (this.localStorageFailed())
            return this.default;
        var value = this._get();
        // If value needs to be integer
        const isnum = /^\d+$/.test(value);
        if (this.valid === 'integer'  &&  isnum) 
            return value;
        // If value needs to be among a list of given values
        else if (this.valid.constructor === Array  &&  this._inList(value))
            return value;
        // If it did not pass the validation
        return this.default;
    }
    // ┌───────────────────────────────────┐
    // │ Private                           │
    // └───────────────────────────────────┘
    _inList(value) {
        for (let v of this.valid)
            if (v == value)
                return true;
         return false;
    }
    // ──────────────────────────────────── 
    _get() {
        var value = localStorage[this.varname];
        if (!value) {
            localStorage.setItem(this.varname, this.default);
            value = this.default;
        }
        return value;
    }
    // ──────────────────────────────────── 
    localStorageFailed() {
        if (typeof(Storage) === "undefined") {
            console.warn("MoaiEditor :: Local Storage is not available in your browser.");
            return true;
        }
        return false;
    }
}; // End Class