getTransactionMessagesWithString(address, str, start)

getTransactionMessagesWithString.js

/**
 * getTransactionMessagesWithString(address, str, start) Obtains every transaction message that contains a certain string (starting from position start)
 *
 * @param {string} address - NEM Address to explore
 * @param {string} str - String to find on addresses txs
 * @param {integer} start - Starting position in the transaction message to search
 *
 * @return {promise} - A promise of the NetworkRequests service that returns an Array with the filtered messages
 */
getTransactionMessagesWithString(address, str, start){

    var deferred = this._q.defer();
    var promise = deferred.promise;

    // Obtain all transactions to/from the address
    this._NetworkRequests.getAllTransactions(helpers.getHostname(this._Wallet.node), address).then((result)=>{
        
        if(result.data.length) {
            var messages = [];
            for (let i = 0; i < result.data.length; ++i) {
                let transaction = result.data[i].transaction;
                if(transaction.type==257){
                    // On this version we are only using decoded messages!
                    let msg = this._filter('fmtHexMessage')(transaction.message);
                    if(msg.includes(str,start)){
                        messages[messages.length]=msg;
                    }
                }
            }
        }
        deferred.resolve(messages);
    });
    return deferred.promise;
}