From 2536fa4937f0283b4187142cc6cede8e1dbfafa8 Mon Sep 17 00:00:00 2001
From: cel 🌸 <cel@blos.sm>
Date: Fri, 20 Oct 2023 02:34:47 +0100
Subject: WIP: mess

---
 src/stanza/mod.rs | 132 ++++++++++++++++++++++++++++++++++++++++++------------
 1 file changed, 104 insertions(+), 28 deletions(-)

(limited to 'src/stanza/mod.rs')

diff --git a/src/stanza/mod.rs b/src/stanza/mod.rs
index 1bb3fc2..13fc31e 100644
--- a/src/stanza/mod.rs
+++ b/src/stanza/mod.rs
@@ -17,8 +17,6 @@ use tokio::io::{AsyncBufRead, AsyncWrite};
 
 use crate::{JabberError, Result};
 
-pub type Prefix<'s> = Option<&'s str>;
-
 #[derive(Clone, Debug)]
 /// represents an xml element as a tree of nodes
 pub struct Element {
@@ -78,19 +76,6 @@ pub struct Element {
     children: Box<Vec<Node>>,
 }
 
-impl Element {
-    pub fn new_empty<S: ToString, C: Into<Node>>(
-        prefix: Option<S>,
-        localname: S,
-        namespace: S,
-        namespace_declarations: BTreeMap<Option<S>, S>,
-        attributes: BTreeMap<S, S>,
-        children: Vec<C>,
-    ) {
-    }
-    pub fn push_child<C: Into<Node>>(&mut self, node: C) {}
-}
-
 #[derive(Clone, Debug)]
 pub enum Node {
     Element(Element),
@@ -244,22 +229,22 @@ impl Element {
     /// by a parent, or itself.
     fn namespace_qualified<S: AsRef<str>>(
         &self,
-        local_namespaces: &BTreeMap<Option<S>, S>,
+        namespace_context: &BTreeMap<Option<S>, S>,
     ) -> bool {
+        // create a new local_namespaces combining that in the context and those declared within the element
+        let mut local_namespaces = *namespace_context.clone();
+        self.namespace_declarations.iter().for_each(|prefix, declaration| local_namespaces.insert(prefix, declaration));
+
         if let Some(namespace) = local_namespaces.get(self.prefix) {
             if namespace != self.namespace {
                 return false;
             }
+        } else {
+            return false;
         };
 
-        if let Some(namespace) = self.namespace_declarations.get(&self.prefix) {
-            if namespace != self.namespace {
-                return false;
-            }
-        }
-
         for child in *self.children {
-            if child.namespace_qualified(local_namespaces) == false {
+            if child.namespace_qualified(&local_namespaces) == false {
                 return false;
             }
         }
@@ -267,6 +252,7 @@ impl Element {
         true
     }
 
+
     /// writes an element to a writer. the element's namespace must be qualified by the
     /// context given in `local_namespaces` or the element's internal namespace declarations
     pub async fn write<S: AsRef<str>, W: AsyncWrite + Unpin + Send>(
@@ -274,7 +260,7 @@ impl Element {
         writer: &mut Writer<W>,
         local_namespaces: &BTreeMap<Option<S>, S>,
     ) -> Result<()> {
-        // TODO: NEXT: instead of having a check if namespace qualified function, have the namespace declarations be added if needed given the context when converting from `Element` to `Event`s
+        // TODO: instead of having a check if namespace qualified function, have the namespace declarations be added if needed given the context when converting from `Element` to `Event`s
         if self.namespace_qualified(local_namespaces) {
             let events: Vec<Event> = self.into();
             for event in events {
@@ -553,17 +539,107 @@ impl Node {
 
     fn namespace_qualified<S: AsRef<str>>(
         &self,
-        local_namespaces: &BTreeMap<Option<S>, S>,
+        namespace_context: &BTreeMap<Option<S>, S>,
     ) -> bool {
         match self {
-            Self::Element(e) => e.namespace_qualified(local_namespaces),
+            Self::Element(e) => e.namespace_qualified(namespace_context),
             _ => true,
         }
     }
 }
 
-// the issue is i don't know how to validate that an element always has a namespace when it is being written
-// TODO: ElementBuilder that makes it easier to build an element under a namespace
+pub enum NodeBuilder {
+    Text(String),
+    Element(ElementBuilder),
+}
+
+pub struct ElementBuilder {
+    localname: String,
+    prefix: Option<String>,
+    namespace: String,
+    namespace_declarations: BTreeMap<Option<String>, String>,
+    attributes: BTreeMap<String, String>,
+    children: Vec<NodeBuilder>,
+}
+
+impl ElementBuilder {
+    pub fn new<S: ToString>(localname: S, prefix: Option<S>, namespace: S) -> Self {
+        Self {
+            prefix,
+            localname,
+            namespace,
+            namespace_declarations: Box::new(BTreeMap::new()),
+            attributes: Box::new(BTreeMap::new()),
+            children: Box::new(Vec::new()),
+        }
+    }
+
+    pub fn push_namespace_declaration<S: ToString>(
+        &mut self,
+        (prefix, namespace): (Option<S>, S),
+    ) -> Option<S> {
+        self.namespace_declarations.insert(prefix, namespace)
+    }
+
+    pub fn push_attribute<S: ToString>(&mut self, (key, value): (S, S)) -> Option<S> {
+        self.attributes.insert(key, value)
+    }
+
+    pub fn push_child(&mut self, child: Node) {
+        self.children.push(child)
+    }
+
+    /// checks if there is a namespace conflict within the element being built
+    pub fn namespace_conflict<S: AsRef<str>>(
+        &self
+    ) -> bool {
+        self.namespace_conflict_recursive(&BTreeMap::new())
+    }
+
+    fn namespace_conflict_recursive<S: AsRef<str>>(
+        &self,
+        parent_namespaces: &BTreeMap<Option<S>, S>,
+    ) -> bool {
+        // create a new local_namespaces combining that in the context and those declared within the element
+        let mut local_namespaces = *parent_namespaces.clone();
+        self.namespace_declarations.iter().for_each(|prefix, declaration| local_namespaces.insert(prefix, declaration));
+
+        if let Some(namespace) = local_namespaces.get(self.prefix) {
+            if namespace != self.namespace {
+                return false;
+            }
+        } else {
+            return false;
+        };
+
+        for child in *self.children {
+            if child.namespace_conflict(&local_namespaces) == false {
+                return false;
+            }
+        }
+
+        true
+    }
+
+    // check for possible conflicts in namespace
+    pub fn build(self) -> Result<Element> {
+        for child in self.children {
+            match child {
+                Node::Element(e) => {
+                    if !e.namespace_conflict()
+                }
+            }
+        }
+        Element {
+            prefix: self.prefix,
+            localname: self.localname,
+            namespace: self.namespace,
+            namespace_declarations: self.namespace_declarations,
+            attributes: self.attributes,
+            children: self.children,
+        }
+    }
+}
 
 #[derive(Debug)]
 pub enum ElementError<'e> {
-- 
cgit