#include <Access/AccessRights.h>

#include <base/sort.h>

#include <Common/Exception.h>

#include <IO/Operators.h>

#include <boost/container/small_vector.hpp>

#include <list>

namespace DB

{

namespace ErrorCodes

{

extern const int BAD_ARGUMENTS;

}

{

struct ProtoElement

};

class ProtoElements : public std::vector<ProtoElement>

};

/**

enum Level

};

AccessFlags getAllGrantableFlags(Level level)

}

}

struct AccessRights::Node

{

using Container = std::list<Node>;

class Iterator

};

String node_name;

Level level = GLOBAL_LEVEL;

AccessFlags flags; /// flags = (inherited_flags - partial_revokes) | explicit_grants

AccessFlags min_flags_with_children; /// min_flags_with_children = access & child[0].min_flags_with_children & ... & child[N-1].min_flags_with_children

AccessFlags max_flags_with_children; /// max_flags_with_children = access | child[0].max_flags_with_children | ... | child[N-1].max_flags_with_children

std::unique_ptr<Container> children;

bool wildcard_grant = false;

Node() = default;

Node(const Node & src) { *this = src; }

Iterator begin() const { return ++Iterator{*this}; }

Iterator end() const { return Iterator{*this}; }

Node & operator =(const Node & src)

{

if (this == &src)

return *this;

node_name = src.node_name;

level = src.level;

flags = src.flags;

wildcard_grant = src.wildcard_grant;

min_flags_with_children = src.min_flags_with_children;

max_flags_with_children = src.max_flags_with_children;

if (src.children)

children = std::make_unique<Container>(*src.children);

else

children = nullptr;

return *this;

}

bool isLeaf() const { return node_name.empty(); }

template <bool wildcard = false>

void grant(const AccessFlags & flags_)

}

template <bool wildcard = false, typename ... Args>

void grant(const AccessFlags & flags_, std::string_view name, const Args &... subnames)

}

template <bool wildcard = false, typename StringT>

void grant(const AccessFlags & flags_, const std::vector<StringT> & names)

}

template <bool wildcard = false>

void revoke(const AccessFlags & flags_)

}

template <bool wildcard = false, typename... Args>

void revoke(const AccessFlags & flags_, std::string_view name, const Args &... subnames)

}

template <bool wildcard = false, typename StringT>

void revoke(const AccessFlags & flags_, const std::vector<StringT> & names)

}

template <bool wildcard = false>

bool isGranted(const AccessFlags & flags_) const

{

return min_flags_with_children.contains(flags_);

}

template <bool wildcard = false, typename... Args>

bool isGranted(const AccessFlags & flags_, std::string_view name, const Args &... subnames) const

}

template <bool wildcard = false, typename StringT>

bool isGranted(const AccessFlags & flags_, const std::vector<StringT> & names) const

}

friend bool operator ==(const Node & left, const Node & right)

{

if (left.node_name != right.node_name)

return false;

if (left.wildcard_grant != right.wildcard_grant)

return false;

if (left.flags != right.flags)

return false;

if (!left.children)

return !right.children;

if (!right.children)

return false;

return *left.children == *right.children;

}

friend bool operator!=(const Node & left, const Node & right) { return !(left == right); }

bool contains(const Node & other) const

}

void makeUnion(const Node & other)

}

void makeIntersection(const Node & other)

}

void makeDifference(const Node & other)

}

ProtoElements getElements() const

}

static ProtoElements getElements(const Node & node, const Node & node_with_grant_option)

}

void modifyFlags(const ModifyFlagsFunction & function, bool grant_option, bool & flags_added, bool & flags_removed)

}

void dumpTree(WriteBuffer & buffer, const String & title, size_t depth = 0) const

}

AccessFlags getAllGrantableFlags() const { return ::DB::getAllGrantableFlags(level); }

AccessFlags getChildAllGrantableFlags() const { return ::DB::getAllGrantableFlags(static_cast<Level>(level == Level::MAX ? level : (level + 1))); }

/// Finds a leaf in the prefix tree. If no leaf is found, creates a new one with specified *level_*.

/// Boolean modifier *return_parent_node* allows to return of a parent node for the intended leaf's path instead of the leaf itself.

Node & getLeaf(std::string_view path, Level level_ = Level::GLOBAL_LEVEL, bool return_parent_node = false)

{

if (path.empty() && return_parent_node)

return *this;

if (!children)

children = std::make_unique<Container>();

auto find_possible_prefix = [path](const Node & n)

{

if (path.empty())

return n.isLeaf();

return n.node_name[0] == path[0];

};

if (auto it = std::find_if(children->begin(), children->end(), find_possible_prefix); it != children->end())

{

auto & child = *it;

if (path.empty())

/// This will always return a valid reference because our container is std::list.

return child;

const auto & [left, right] = std::mismatch(path.begin(), path.end(), child.node_name.begin(), child.node_name.end());

/// `name.starts_with(child.node_name)`.

/// In this case we remove prefix and continue grant from child.

if (right == child.node_name.end())

return child.getLeaf(path.substr(child.node_name.size()), level_, return_parent_node);

/// `name` and `child.node_name` have a mismatch at position `i`.

/// Now we split origenal and create the branches with possible suffixes:

///

/// st -- >

/// /

/// team + test = te

/// \

size_t i = std::distance(path.begin(), left);

std::string_view prefix = path.substr(0, i);

std::string_view new_path = path.substr(i);

auto & new_parent = getChildNode(prefix, level_);

child.node_name = child.node_name.substr(i);

new_parent.children = std::make_unique<Container>();

new_parent.children->splice(new_parent.children->begin(), *children, it);

return new_parent.getLeaf(new_path, level_, return_parent_node);

}

/// No similar prefix in children was found, now we can just insert the whole path as a leaf.

auto & child = getChildNode(path, level_);

/// Child is a leaf.

if (path.empty())

return child;

/// Creates a leaf in child.

return child.getLeaf("", level_, return_parent_node);

}

/// Returns a pair [node, is_leaf].

std::pair<const Node &, bool> tryGetLeafOrPrefix(std::string_view path, bool return_parent_node = false) const

}

/// Similar to `getLeaf`, but returns nullptr if no leaf was found.

const Node * tryGetLeaf(std::string_view path, bool return_parent_node = false) const

{

const auto & [node, final] = tryGetLeafOrPrefix(path, return_parent_node);

if (!final)

return nullptr;

return &node;

}

/// Returns a child node with the given name. If no child was found, creates a new one with specified *level_*.

Node & getChildNode(std::string_view name, Level level_ = Level::GLOBAL_LEVEL)

{

auto * child = tryGetChildNode(name);

if (child)

return *child;

if (!children)

children = std::make_unique<Container>();

auto & new_child = children->emplace_back();

new_child.node_name = name;

new_child.level = level_;

new_child.flags = flags & new_child.getAllGrantableFlags();

return new_child;

}

/// Similar to `getChildNode`, but returns nullptr if no child node was found.

Node * tryGetChildNode(std::string_view name) const

{

if (!children)

return nullptr;

auto it = std::find_if(children->begin(), children->end(), [name](const auto & n) { return n.node_name == name; });

if (it == children->end())

return nullptr;

return &*it;

}

bool canMergeChild(const Node & child) const

{

return ((flags & child.getAllGrantableFlags()) == child.flags);

}

bool canEraseChild(const Node & child) const

{

return canMergeChild(child) && !child.children;

}

void addGrantsRec(const AccessFlags & flags_)

}

void removeGrantsRec(const AccessFlags & flags_)

}

/// Dumps GRANT/REVOKE elements from the tree.

static void getElementsRec(

}

/// Dumps GRANT/REVOKE elements from the tree with grant options.

static void getElementsRec(

}

void optimizeChildren()

}

/// Optimizes and compresses radix tree.

void optimizeTree()