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#include "generator/filter_elements.hpp"
#include "base/logging.hpp"
#include <algorithm>
#include <fstream>
#include <iterator>
namespace
{
template <typename T>
class Set
{
public:
bool Add(T const & key)
{
if (Contains(key))
return false;
m_vec.push_back(key);
return true;
}
bool Contains(T const & key) const
{
return std::find(std::begin(m_vec), std::end(m_vec), key) != std::end(m_vec);
}
private:
std::vector<T> m_vec;
};
} // namespace
namespace generator
{
bool FilterData::IsMatch(Tags const & elementTags, Tags const & tags)
{
auto const fn = [&](OsmElement::Tag const & t)
{
auto const pred = [&](OsmElement::Tag const & tag) { return tag.key == t.key; };
auto const it = std::find_if(std::begin(elementTags), std::end(elementTags), pred);
return it == std::end(elementTags) ? false : t.value == "*" || it->value == t.value;
};
return std::all_of(std::begin(tags), std::end(tags), fn);
}
void FilterData::AddSkippedId(uint64_t id)
{
m_skippedIds.insert(id);
}
void FilterData::AddSkippedTags(Tags const & tags)
{
m_rulesStorage.push_back(tags);
for (auto const & t : tags)
m_skippedTags.emplace(t.key, m_rulesStorage.back());
}
bool FilterData::NeedSkipWithId(uint64_t id) const
{
return m_skippedIds.find(id) != std::end(m_skippedIds);
}
bool FilterData::NeedSkipWithTags(Tags const & tags) const
{
Set<Tags const *> s;
for (auto const & tag : tags)
{
auto const t = m_skippedTags.equal_range(tag.key);
for (auto it = t.first; it != t.second; ++it)
{
Tags const & t = it->second;
if (s.Add(&t) && IsMatch(tags, t))
return true;
}
}
return false;
}
bool FilterElements::ParseSection(json_t * json, FilterData & fdata)
{
if (!json_is_object(json))
return false;
char const * key = nullptr;
json_t * value = nullptr;
json_object_foreach(json, key, value)
{
if (std::strcmp("ids", key) == 0 && !ParseIds(value, fdata))
return false;
else if (std::strcmp("tags", key) == 0 && !ParseTags(value, fdata))
return false;
return true;
}
return true;
}
bool FilterElements::ParseIds(json_t * json, FilterData & fdata)
{
if (!json_is_array(json))
return false;
size_t const sz = json_array_size(json);
for (size_t i = 0; i < sz; ++i)
{
auto const * o = json_array_get(json, i);
if (!json_is_integer(o))
return false;
auto const val = json_integer_value(o);
if (val < 0)
return false;
fdata.AddSkippedId(static_cast<uint64_t>(val));
}
return true;
}
bool FilterElements::ParseTags(json_t * json, FilterData & fdata)
{
if (!json_is_array(json))
return false;
size_t const sz = json_array_size(json);
for (size_t i = 0; i < sz; ++i)
{
auto * o = json_array_get(json, i);
if (!json_is_object(o))
return false;
char const * key = nullptr;
json_t * value = nullptr;
FilterData::Tags tags;
json_object_foreach(o, key, value)
{
if (!json_is_string(value))
return false;
auto const val = json_string_value(value);
tags.emplace_back(key, val);
}
if (!tags.empty())
fdata.AddSkippedTags(tags);
}
return true;
}
FilterElements::FilterElements(std::string const & filename)
{
std::ifstream stream(filename);
std::string str((std::istreambuf_iterator<char>(stream)), std::istreambuf_iterator<char>());
if (!ParseString(str))
LOG(LERROR, ("Cannot parse file", filename));
}
bool FilterElements::NeedSkip(OsmElement const & element) const
{
switch (element.type)
{
case OsmElement::EntityType::Node: return NeedSkip(element, m_nodes);
case OsmElement::EntityType::Way: return NeedSkip(element, m_ways);
case OsmElement::EntityType::Relation: return NeedSkip(element, m_relations);
default: return false;
}
}
bool FilterElements::NeedSkip(OsmElement const & element, FilterData const & fdata) const
{
return fdata.NeedSkipWithId(element.id) || fdata.NeedSkipWithTags(element.Tags());
}
bool FilterElements::ParseString(std::string const & str)
{
base::Json json(str);
if (!json_is_object(json.get()))
return false;
char const * key = nullptr;
json_t * value = nullptr;
json_object_foreach(json.get(), key, value)
{
bool res = true;
if (std::strcmp("node", key) == 0)
res = ParseSection(value, m_nodes);
else if (std::strcmp("way", key) == 0)
res = ParseSection(value, m_ways);
else if (std::strcmp("relation", key) == 0)
res = ParseSection(value, m_relations);
if (!res)
return false;
}
return true;
}
} // namespace generator
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