Refactor and cleanup XForms submission XQuery code

Author: adamretter

src/main/xar-resources/modules/request-helper.xqm

@@ -0,0 +1,54 @@
+xquery version "3.1";
+
+module namespace rh = "http://localhost/manuForma/request-helper";
+
+import module namespace request = "http://exist-db.org/xquery/request";
+
+(:~
+ : Get a HTTP request parameter.
+ : Unlike request:get-parameter this will ignore parameters that have an empty string value, and return the default.
+ :
+ : @param $name the name of the HTTP request parameter
+ : @param $default the default value to return if there is no valid parameter
+ :
+ : @return the value of the parameter if it is valid, or the default.
+ :)
+declare function rh:request-param($name as xs:string, $default) {
+    let $values := request:get-parameter($name, ())[. ne ""]
+    return
+        if (exists($values)) then
+            $values
+        else
+            $default
+};
+
+(:~
+ : Get a HTTP request parameter as a boolean value.
+ : Unlike request:get-parameter this will ignore parameters that have an empty string value.
+ :
+ : @param $name the name of the HTTP request parameter
+ :
+ : @return the boolean value of the parameter.
+ :)
+declare function rh:request-param-bool($name as xs:string) as xs:boolean {
+    lower-case(rh:request-param($name, "false")[1]) eq "true"
+};
+
+(:~
+ : Get HTTP request parameters.
+ : Unlike request:get-parameter this will ignore parameters that have an empty string value, and return the default.
+ :
+ : @param $name-prefix the name prefix of the HTTP request parameters
+ : @param $default the default value to return if there is no valid parameter
+ :
+ : @return a map or the names and values of the parameters if valid, or the default.
+ :)
+declare function rh:request-params($name-prefix as xs:string, $default-value) as map(xs:string, xs:string*)* {
+    for $name in request:get-parameter-names()[starts-with(., $name-prefix)]
+    let $value := rh:request-param($name, $default-value)
+    return
+        if (exists($value)) then
+            map { "name": $name, "value": $value }
+        else
+            ()
+};