clean up and added tests
This commit is contained in:
Niels
parent
09e9f6dcd4
commit
fb54e212b6
3 changed files with 310 additions and 122 deletions
120
src/json.hpp
120
src/json.hpp
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@ -9518,42 +9518,44 @@ basic_json_parser_63:
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*/
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basic_json apply_patch(const basic_json& patch) const
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{
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// make a working copy to apply the patch to
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basic_json result = *this;
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if (not patch.is_array())
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{
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// a JSON patch must be an array of objects
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throw std::domain_error("JSON patch must be an array of objects");
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}
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const auto operation_add = [&result](json_pointer & ptr,
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basic_json & value)
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// wrapper for "add" operation; add value at ptr
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const auto operation_add = [&result](json_pointer & ptr, basic_json value)
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{
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// get reference to parent of JSON pointer ptr
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const auto last_path = ptr.pop_back();
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basic_json& parent = result.at(ptr);
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if (parent.is_object())
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{
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// use operator[] to add value
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parent[last_path] = value;
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}
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else if (parent.is_array())
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{
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if (last_path == "-")
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{
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// special case: append to back
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parent.push_back(value);
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}
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else
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{
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parent.insert(parent.begin() + std::stoi(last_path),
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value);
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// default case: insert add offset
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parent.insert(parent.begin() + std::stoi(last_path), value);
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}
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}
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};
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// wrapper for "remove" operation; remove value at ptr
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const auto operation_remove = [&result](json_pointer & ptr)
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{
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// get reference to parent of JSON pointer ptr
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const auto last_path = ptr.pop_back();
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basic_json& parent = result.at(ptr);
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// remove child
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if (parent.is_object())
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{
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parent.erase(parent.find(last_path));
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@ -9564,41 +9566,57 @@ basic_json_parser_63:
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}
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};
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// type check
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if (not patch.is_array())
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{
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// a JSON patch must be an array of objects
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throw std::domain_error("JSON patch must be an array of objects");
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}
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// iterate and apply th eoperations
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for (const auto& val : patch)
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{
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// wrapper to get a value for an operation
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const auto get_value = [&val](const std::string & op,
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const std::string & member,
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bool string_type = false) -> basic_json&
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{
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// find value
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auto it = val.m_value.object->find(member);
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// context-sensitive error message
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const auto error_msg = (op == "op") ? "operation" : "operation '" + op + "'";
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// check if desired value is present
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if (it == val.m_value.object->end())
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{
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throw std::domain_error(error_msg + " must have member '" + member + "'");
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}
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// check if result is of type string
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if (string_type and not it->second.is_string())
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{
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throw std::domain_error(error_msg + " must have string member '" + member + "'");
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}
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// no error: return value
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return it->second;
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};
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// type check
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if (not val.is_object())
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{
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throw std::domain_error("JSON patch must be an array of objects");
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}
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// collect members
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const auto it_op = val.m_value.object->find("op");
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const auto it_path = val.m_value.object->find("path");
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const auto it_value = val.m_value.object->find("value");
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const auto it_from = val.m_value.object->find("from");
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if (it_op == val.m_value.object->end() or not it_op->second.is_string())
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{
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throw std::domain_error("operation must have a string 'op' member");
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}
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if (it_path == val.m_value.object->end() or not it_op->second.is_string())
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{
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throw std::domain_error("operation must have a string 'path' member");
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}
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const std::string op = it_op->second;
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const std::string path = it_path->second;
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json_pointer ptr(path);
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// collect mandatory members
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const std::string op = get_value("op", "op", true);
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const std::string path = get_value(op, "path", true);
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json_pointer ptr(get_value(op, "path", true));
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if (op == "add")
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{
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if (it_value == val.m_value.object->end())
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{
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throw std::domain_error("'add' operation must have member 'value'");
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}
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operation_add(ptr, it_value->second);
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operation_add(ptr, get_value("add", "value"));
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}
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else if (op == "remove")
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{
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@ -9606,21 +9624,11 @@ basic_json_parser_63:
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}
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else if (op == "replace")
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{
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if (it_value == val.m_value.object->end())
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{
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throw std::domain_error("'replace' operation must have member 'value'");
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}
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result.at(ptr) = it_value->second;
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result.at(ptr) = get_value("replace", "value");
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}
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else if (op == "move")
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{
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if (it_from == val.m_value.object->end())
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{
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throw std::domain_error("'move' operation must have member 'from'");
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}
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const std::string from_path = it_from->second;
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const std::string from_path = get_value("move", "from", true);
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json_pointer from_ptr(from_path);
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basic_json v = result[from_ptr];
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@ -9629,32 +9637,22 @@ basic_json_parser_63:
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}
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else if (op == "copy")
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{
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if (it_from == val.m_value.object->end())
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{
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throw std::domain_error("'copy' operation must have member 'from'");
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}
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const std::string from_path = it_from->second;
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const std::string from_path = get_value("copy", "from", true);;
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const json_pointer from_ptr(from_path);
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result[ptr] = result.at(from_ptr);
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}
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else if (op == "test")
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{
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if (it_value == val.m_value.object->end())
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{
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throw std::domain_error("'test' operation must have member 'value'");
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}
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if (result.at(ptr) != it_value->second)
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if (result.at(ptr) != get_value("test", "value"))
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{
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throw std::domain_error("unsuccessful: " + val.dump());
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}
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}
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else
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{
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// op must be "add", "remove", "replace", "move",
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// "copy", or "test"
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// op must be "add", "remove", "replace", "move", "copy", or
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// "test"
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throw std::domain_error("operation value '" + op + "' is invalid");
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}
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}
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@ -8828,42 +8828,44 @@ class basic_json
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*/
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basic_json apply_patch(const basic_json& patch) const
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{
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// make a working copy to apply the patch to
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basic_json result = *this;
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if (not patch.is_array())
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{
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// a JSON patch must be an array of objects
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throw std::domain_error("JSON patch must be an array of objects");
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}
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const auto operation_add = [&result](json_pointer & ptr,
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basic_json & value)
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// wrapper for "add" operation; add value at ptr
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const auto operation_add = [&result](json_pointer & ptr, basic_json value)
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{
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// get reference to parent of JSON pointer ptr
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const auto last_path = ptr.pop_back();
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basic_json& parent = result.at(ptr);
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if (parent.is_object())
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{
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// use operator[] to add value
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parent[last_path] = value;
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}
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else if (parent.is_array())
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{
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if (last_path == "-")
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{
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// special case: append to back
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parent.push_back(value);
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}
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else
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{
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parent.insert(parent.begin() + std::stoi(last_path),
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value);
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// default case: insert add offset
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parent.insert(parent.begin() + std::stoi(last_path), value);
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}
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}
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};
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// wrapper for "remove" operation; remove value at ptr
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const auto operation_remove = [&result](json_pointer & ptr)
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{
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// get reference to parent of JSON pointer ptr
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const auto last_path = ptr.pop_back();
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basic_json& parent = result.at(ptr);
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// remove child
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if (parent.is_object())
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{
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parent.erase(parent.find(last_path));
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@ -8874,41 +8876,57 @@ class basic_json
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}
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};
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// type check
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if (not patch.is_array())
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{
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// a JSON patch must be an array of objects
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throw std::domain_error("JSON patch must be an array of objects");
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}
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// iterate and apply th eoperations
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for (const auto& val : patch)
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{
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// wrapper to get a value for an operation
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const auto get_value = [&val](const std::string & op,
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const std::string & member,
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bool string_type = false) -> basic_json&
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{
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// find value
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auto it = val.m_value.object->find(member);
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// context-sensitive error message
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const auto error_msg = (op == "op") ? "operation" : "operation '" + op + "'";
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// check if desired value is present
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if (it == val.m_value.object->end())
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{
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throw std::domain_error(error_msg + " must have member '" + member + "'");
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}
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// check if result is of type string
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if (string_type and not it->second.is_string())
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{
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throw std::domain_error(error_msg + " must have string member '" + member + "'");
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}
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// no error: return value
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return it->second;
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};
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// type check
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if (not val.is_object())
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{
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throw std::domain_error("JSON patch must be an array of objects");
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}
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// collect members
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const auto it_op = val.m_value.object->find("op");
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const auto it_path = val.m_value.object->find("path");
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const auto it_value = val.m_value.object->find("value");
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const auto it_from = val.m_value.object->find("from");
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if (it_op == val.m_value.object->end() or not it_op->second.is_string())
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{
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throw std::domain_error("operation must have a string 'op' member");
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}
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if (it_path == val.m_value.object->end() or not it_op->second.is_string())
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{
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throw std::domain_error("operation must have a string 'path' member");
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}
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const std::string op = it_op->second;
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const std::string path = it_path->second;
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json_pointer ptr(path);
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// collect mandatory members
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const std::string op = get_value("op", "op", true);
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const std::string path = get_value(op, "path", true);
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json_pointer ptr(get_value(op, "path", true));
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if (op == "add")
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{
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if (it_value == val.m_value.object->end())
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{
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throw std::domain_error("'add' operation must have member 'value'");
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}
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operation_add(ptr, it_value->second);
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operation_add(ptr, get_value("add", "value"));
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}
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else if (op == "remove")
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{
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@ -8916,21 +8934,11 @@ class basic_json
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}
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else if (op == "replace")
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{
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if (it_value == val.m_value.object->end())
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{
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throw std::domain_error("'replace' operation must have member 'value'");
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}
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result.at(ptr) = it_value->second;
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result.at(ptr) = get_value("replace", "value");
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}
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else if (op == "move")
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{
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if (it_from == val.m_value.object->end())
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{
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throw std::domain_error("'move' operation must have member 'from'");
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}
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const std::string from_path = it_from->second;
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const std::string from_path = get_value("move", "from", true);
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json_pointer from_ptr(from_path);
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basic_json v = result[from_ptr];
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@ -8939,32 +8947,22 @@ class basic_json
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}
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else if (op == "copy")
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{
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if (it_from == val.m_value.object->end())
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{
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throw std::domain_error("'copy' operation must have member 'from'");
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}
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const std::string from_path = it_from->second;
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const std::string from_path = get_value("copy", "from", true);;
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const json_pointer from_ptr(from_path);
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result[ptr] = result.at(from_ptr);
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}
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else if (op == "test")
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{
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if (it_value == val.m_value.object->end())
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{
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throw std::domain_error("'test' operation must have member 'value'");
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}
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if (result.at(ptr) != it_value->second)
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if (result.at(ptr) != get_value("test", "value"))
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{
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throw std::domain_error("unsuccessful: " + val.dump());
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}
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}
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else
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{
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// op must be "add", "remove", "replace", "move",
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// "copy", or "test"
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// op must be "add", "remove", "replace", "move", "copy", or
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// "test"
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throw std::domain_error("operation value '" + op + "' is invalid");
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}
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}
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