RecursiveAlerts
// This source code is subject to the terms of the Mozilla Public License 2.0 at https://mozilla.org/MPL/2.0/
// © HeWhoMustNotBeNamed

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//@version=5

// @description The library provides options to run alert() calls in loop without worrying about limitations of frequency options.
//      When an alert statement is called within a loop,
//          it will fire just once per bar irrespective of how many iterations allowed when fequency is set to alert.freq_once_per_bar or alert.freq_once_per_bar_close
//          it will fire continuously till it breaks when frequency is set to alert.freq_all
//      The function helps overcome this issue by using varip key array which resets on every bar
library("RecursiveAlerts", overlay=true)

// @function Enhanced alert which can be used in loops
// @param message Alert message to be fired
// @param key Key to be checked to avoid repetitive alerts
// @returns array containing id of already fired alerts
export rAlert(string message, string key) =>
    varip fired = array.new<string>()
    if(barstate.isrealtime)
	    if(barstate.isnew)
	        array.clear(fired)
	    if not array.includes(fired, key)
	        alert(message, alert.freq_all)
	        array.push(fired, key)
	fired

// @function Updates alert template with given keys and values
// @param template Alert message template
// @param keys array containing placeholders to be replaced
// @param values array containing values which will replace placeholder keys
// @returns updated alert message
export updateAlertTemplate(string template, string[] keys, string[] values)=>
    updatedAlert = template
    for [i, key] in keys
        updatedAlert := str.replace_all(updatedAlert, key, array.get(values, i))
    updatedAlert