BaseHelper.js

({
    /*
     * This method will call the server side action and will execute callback method
     * it will also show error if generated any
     * @param component (required) - Calling component
     * @param method (required) - Server side methos name
     * @param callback (required) - Callback function to be executed on server response
     * @param params (optional) - parameter values to pass to server
     * @param setStorable(optional) - if true, action response will be stored in cache
     * */
    callServer : function(component, method, callback, params, setStorable) {
        var action = component.get(method);
        
        //Set params if any
        if (params) {
            action.setParams(params);
        }
        
        if(setStorable){
            actions.setStorable();
        }
        
        action.setCallback(this,function(response) {
            var state = response.getState();
            if (state === "SUCCESS") { 
                // pass returned value to callback function
                callback.call(this,response.getReturnValue());   
            } else if (state === "ERROR") {
                // generic error handler
                var errors = response.getError();
                if (errors) {
                    console.log("Errors", errors);
                    this.showToast({
                        "title": "ERROR IN SERVER CALL",
                        "type": "error",
                        "message": errors
                    });
                    if (errors[0] && errors[0].message) {
                        throw new Error("Error" + errors[0].message);
                    }
                } else {
                    throw new Error("Unknown Error");
                }
            }
        });
        
        $A.enqueueAction(action);
    },
    
    /*
     * This function displays toast based on the parameter values passed to it
     * */
    showToast : function(params) {
        var toastEvent = $A.get("e.force:showToast");
        if(toastEvent){
            if(!params){
                toastEvent.setParams({
                    "title": "TOAST ERROR!",
                    "type": "error",
                    "message": "Toast Param not defined"
                });
                toastEvent.fire();
            } else{
                toastEvent.setParams(params);
                toastEvent.fire();
            }
        } else{
            alert(params.message);
        }
    },
})