[3.1.0] De-crudify the ConfigSchema space; we're starting over again

- Optimize ConfigSchema by removing non-essential runtime data. We can probably optimize even more by collapsing object structures to arrays.
- Removed validation data from ConfigSchema; this will be reimplemented on Interchange
- Implement a sane Interchange composite hierarchy that doesn't use arrays
- Implement StringHash -> Interchange -> ConfigSchema, and rewrite maintenance file to account for this

git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@1615 48356398-32a2-884e-a903-53898d9a118a

library/HTMLPurifier/ConfigSchema/Builder/ConfigSchema.php

@@ -0,0 +1,48 @@
+<?php
+
+/**
+ * Converts HTMLPurifier_ConfigSchema_Interchange to our runtime
+ * representation used to perform checks on user configuration.
+ */
+class HTMLPurifier_ConfigSchema_Builder_ConfigSchema
+{
+    
+    public function build($interchange) {
+        $schema = new HTMLPurifier_ConfigSchema();
+        foreach ($this->namespaces as $n) {
+            $schema->addNamespace($n->namespace);
+        }
+        foreach ($this->directives as $d) {
+            $schema->add(
+                $d->id->namespace,
+                $d->id->directive,
+                $d->default,
+                $d->type,
+                $d->typeAllowsNull
+            );
+            if ($d->allowed !== null) {
+                $schema->addAllowedValues(
+                    $d->id->namespace,
+                    $d->id->directive,
+                    $d->allowed
+                );
+            }
+            foreach ($d->aliases as $alias) {
+                $schema->addAlias(
+                    $alias->id->namespace,
+                    $alias->id->directive,
+                    $d->id->namespace,
+                    $d->id->directive
+                );
+            }
+            if ($d->valueAliases !== null) {
+                $schema->addValueAliases(
+                    $d->id->namespace,
+                    $d->id->directive,
+                    $d->valueAliases
+                );
+            }
+        }
+    }
+    
+}