Added nev validator "checked" and strings for INVALID_CHECKBOX_SELECTED

I needed a validator to check explicit for the value true on several
checkboxes.
And it was easier to add a single standard validator to check for the
value true than add several regex custom validators

Author: tlastad

locales/validation/en.json

@@ -51,6 +51,7 @@
     "INVALID_REQUIRED":                 "Field is required. ",
     "INVALID_URL":                      "Must be a valid URL. ",
     "INVALID_TIME":                     "Must be a valid time format (hh:mm) OR (hh:mm:ss). ",
+    "INVALID_CHECKBOX_SELECTED":        "Checkbox must be selected",
 
     "AREA1":                            "TextArea: Alphanumeric + Minimum(15) + Required",
     "ERRORS":                           "Errors",

locales/validation/es.json

@@ -51,6 +51,7 @@
     "INVALID_REQUIRED":                 "El campo es requerido. ",
     "INVALID_URL":                      "Debe contener una dirección URL valida. ",
     "INVALID_TIME":                     "Debe contener un formato de tiempo valido (hh:mm) ó (hh:mm:ss). ",
+    "INVALID_CHECKBOX_SELECTED":        "Checkbox must be selected",
 
     "AREA1":                            "Area de texto: Alfanúmerica + Minimo(15) + Requerido",
     "ERRORS":                           "Errores",

locales/validation/fr.json

@@ -51,6 +51,7 @@
     "INVALID_REQUIRED":                 "Le champ est requis. ",
     "INVALID_URL":                      "Doit être un URL valide. ",
     "INVALID_TIME":                     "Doit être un format de date valide (hh:mm) OU (hh:mm:ss). ",
+    "INVALID_CHECKBOX_SELECTED":        "Checkbox must be selected",
 
     "AREA1":                            "TextArea: Alphanumérique + Minimum(15) + Required",
     "ERRORS":                           "Erreurs",

locales/validation/no.json

@@ -51,6 +51,7 @@
     "INVALID_REQUIRED":                 "Feltet er påkrevd. ",
     "INVALID_URL":                      "Må være en gyldig URL. ",
     "INVALID_TIME":                     "Må være et gyldig tidsformat (tt:mm) OR (tt:mm:ss). ",
+    "INVALID_CHECKBOX_SELECTED":        "Du må krysse av.",
 
     "AREA1":                            "TextArea: Alfanumerisk + Minimum(15) + Påkrevd",
     "ERRORS":                           "Feil",

src/validation-rules.js

@@ -541,6 +541,13 @@ angular
             type: "regex"
           };
           break;
+        case "checked":
+          validator = {
+            pattern: "^true$",
+            message: "INVALID_CHECKBOX_SELECTED",
+            type: "regex"
+          };
+          break;
       } // switch()
 
       // add the possible alternate text user might have provided