<?php 
require_once('utils.php');

/** stringInvalidMsg : string, int, boolean -> string-or-false
  * Return an error-message (cannot contain html markup),
  * if $str longer than $maxAllowedLen
  * or if $str contains spaces and $spacesAllowed===false.
  * Returns false, if there is no error-message to report.
  */
function stringInvalidMsg( $str, $maxAllowedLen, $spacesAllowed = true ) {
    $problemsSoFar = "";
    $excessLen = (strlen($str) - $maxAllowedLen);
    if ($excessLen > 0) {
         $problemsSoFar .= "Can't be more than $maxAllowedLen characters long (it is "
                          . pluralize($excessLen, "character")
                          . " too long).  ";
        }
    if (!$spacesAllowed && preg_match('/\p{Z}/',$str)) {
        $problemsSoFar .= "Cannot contain any space characters.  ";
        }
    return ($problemsSoFar==="")  ?  false  :  $problemsSoFar;
    }


/* internal helper for allErrorMsgs */
function addStringInvalidMsgToArray( $formInfo, $key, $maxLength, $spacesAllowed, $theMsgArray ) {
    $errMsg = stringInvalidMsg(safeLookup($formInfo,$key,""), $maxLength, $spacesAllowed);
    if ($errMsg !== false) { $theMsgArray[$key] = $errMsg; }
    return $theMsgArray;
    }

/* allErrorMsgs : string[] -> string[]
 * Given form information for `form0-validated.php`,
 * return an array of all the error-messages,
 * indexed by the offending field.
 */
function allErrorMsgs( $formInfo ) {
    $allErrors = array();
    
    $allErrors = addStringInvalidMsgToArray( $formInfo, 'quest', 20, true, $allErrors );
    $allErrors = addStringInvalidMsgToArray( $formInfo, 'favorite-color', 15, false, $allErrors );
    $allErrors = addStringInvalidMsgToArray( $formInfo, 'msg', 1000, true, $allErrors );

    if (array_key_exists('is-happy',$formInfo) && $formInfo['is-happy'] !== "yep") {
        $allErrors['is-happy'] = "Your happiness-level is wrong. (Go away, form tamperer!)";
        }

    return $allErrors;
    }
?>