1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
|
#ifndef XMPP_STANZA_INCLUDED
# define XMPP_STANZA_INCLUDED
#include <unordered_map>
#include <string>
#include <vector>
std::string xml_escape(const std::string& data);
std::string xml_unescape(const std::string& data);
/**
* 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
* - A map of attributes
* - inner data (text inside the node)
* - tail data (text 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(node.parent),
closed(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;
}
/**
* The copy constructor do not copy the parent attribute. The children
* nodes are all copied recursively.
*/
XmlNode(const XmlNode& node):
name(node.name),
parent(nullptr),
closed(node.closed),
attributes(node.attributes),
children{},
inner(node.inner),
tail(node.tail)
{
for (XmlNode* child: node.children)
{
XmlNode* child_copy = new XmlNode(*child);
this->add_child(child_copy);
}
}
~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
*/
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 std::string& xmlns) const;
/**
* Add a node child to this node. Assign this node to the child’s parent.
* Returns a pointer to the newly added child.
*/
XmlNode* add_child(XmlNode* child);
XmlNode* add_child(XmlNode&& child);
/**
* Returns the last of the children. If the node doesn't have any child,
* the behaviour is undefined. The user should make sure this is the case
* by calling has_children() for example.
*/
XmlNode* get_last_child() const;
/**
* Mark this node as closed, nothing else
*/
void close();
XmlNode* get_parent() const;
void set_name(const std::string& name);
const std::string get_name() const;
/**
* Serialize the stanza into a string
*/
std::string to_string() 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, returns an empty string if the
* node as no such attribute.
*/
const std::string get_tag(const std::string& name) const;
/**
* Remove the attribute of the node. Does nothing if that attribute is not
* present. Returns true if the tag was removed, false if it was absent.
*/
bool del_tag(const std::string& name);
/**
* 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& 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
|
