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#ifndef XMPP_STANZA_INCLUDED
# define XMPP_STANZA_INCLUDED
#include <unordered_map>
#include <string>
#include <vector>
std::string xml_escape(const std::string& data);
/**
* Raised on operator[] when the attribute does not exist
*/
class AttributeNotFound: public std::exception
{
};
/**
* Represent an XML node. It has
* - A parent XML node (in the case of the first-level nodes, the parent is
nullptr)
* - zero, one or more children XML nodes
* - A name
* - attributes
* - inner data (inside the node)
* - tail data (just after the node)
*/
class XmlNode
{
public:
explicit XmlNode(const std::string& name, XmlNode* parent);
explicit XmlNode(const std::string& name);
XmlNode(XmlNode&& node):
name(std::move(node.name)),
parent(std::move(node.parent)),
closed(std::move(node.closed)),
attributes(std::move(node.attributes)),
children(std::move(node.children)),
inner(std::move(node.inner)),
tail(std::move(node.tail))
{
node.parent = nullptr;
}
~XmlNode();
void delete_all_children();
void set_attribute(const std::string& name, const std::string& value);
/**
* Set the content of the tail, that is the text just after this node
*/
void set_tail(const std::string& data);
/**
* Append the given data to the content of the tail. This exists because
* the expat library may provide the complete text of an element in more
* than one call
*/
void add_to_tail(const std::string& data);
/**
* Set the content of the inner, that is the text inside this node.
*/
void set_inner(const std::string& data);
/**
* Append the given data to the content of the inner. For the reason
* described in add_to_tail comment.
*/
void add_to_inner(const std::string& data);
/**
* Get the content of inner
* TODO: unescape it here.
*/
std::string get_inner() const;
/**
* Get the content of the tail
*/
std::string get_tail() const;
/**
* Get a pointer to the first child element with that name
*/
XmlNode* get_child(const std::string& name) const;
void add_child(XmlNode* child);
void add_child(XmlNode&& child);
XmlNode* get_last_child() const;
/**
* Mark this node as closed, nothing else
*/
void close();
XmlNode* get_parent() const;
const std::string& get_name() const;
/**
* Serialize the stanza into a string
*/
std::string to_string() const;
void display() const;
/**
* Whether or not this node has at least one child (if not, this is a leaf
* node)
*/
bool has_children() const;
/**
* Gets the value for the given attribute, raises AttributeNotFound if the
* node as no such attribute.
*/
const std::string& operator[](const std::string& name) const;
/**
* Use this to set an attribute's value, like node["id"] = "12";
*/
std::string& operator[](const std::string& name);
private:
std::string name;
XmlNode* parent;
bool closed;
std::unordered_map<std::string, std::string> attributes;
std::vector<XmlNode*> children;
std::string inner;
std::string tail;
XmlNode(const XmlNode&) = delete;
XmlNode& operator=(const XmlNode&) = delete;
XmlNode& operator=(XmlNode&&) = delete;
};
/**
* An XMPP stanza is just an XML node of level 2 in the XMPP document (the
* level 1 ones are the <stream::stream/>, and the ones about 2 are just the
* content of the stanzas)
*/
typedef XmlNode Stanza;
#endif // XMPP_STANZA_INCLUDED
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