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