mirror of
https://github.com/pantor/inja.git
synced 2026-09-17 19:38:03 +00:00
split parser and renderer
This commit is contained in:
pantor
+451
-333
@@ -183,16 +183,15 @@ inline Match match(const std::string& input, std::vector<Regex> regexes) {
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}
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class Parser {
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public:
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struct Parsed {
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enum class Type {
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String,
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Loop,
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Condition,
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ConditionBranch,
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Include,
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Comment,
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Variable
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Expression
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};
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enum class Delimiter {
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@@ -202,34 +201,12 @@ public:
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Comment
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};
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std::map<Delimiter, Regex> regex_map_delimiters = {
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{Delimiter::Statement, Regex{"\\{\\%\\s*(.+?)\\s*\\%\\}"}},
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{Delimiter::LineStatement, Regex{"(?:^|\\n)##\\s*(.+)\\s*"}},
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{Delimiter::Expression, Regex{"\\{\\{\\s*(.+?)\\s*\\}\\}"}},
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{Delimiter::Comment, Regex{"\\{#\\s*(.*?)\\s*#\\}"}}
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};
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enum class Statement {
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Loop,
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Condition,
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Include
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};
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const std::map<Statement, Regex> regex_map_statement_openers = {
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{Statement::Loop, Regex{"for (.*)"}},
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{Statement::Condition, Regex{"if (.*)"}},
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{Statement::Include, Regex{"include \"(.*)\""}}
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};
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const Regex regex_loop_open = regex_map_statement_openers.at(Statement::Loop);
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const Regex regex_loop_in_list{"for (\\w+) in (.+)"};
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const Regex regex_loop_close{"endfor"};
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const Regex regex_condition_open = regex_map_statement_openers.at(Statement::Condition);
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const Regex regex_condition_else_if{"else if (.*)"};
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const Regex regex_condition_else{"else"};
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const Regex regex_condition_close{"endif"};
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enum class ConditionOperators {
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Not,
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And,
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@@ -243,19 +220,6 @@ public:
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Different
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};
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const std::map<ConditionOperators, Regex> regex_map_condition_operators = {
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{ConditionOperators::Not, Regex{"not (.+)"}},
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{ConditionOperators::And, Regex{"(.+) and (.+)"}},
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{ConditionOperators::Or, Regex{"(.+) or (.+)"}},
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{ConditionOperators::In, Regex{"(.+) in (.+)"}},
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{ConditionOperators::Equal, Regex{"(.+) == (.+)"}},
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{ConditionOperators::Greater, Regex{"(.+) > (.+)"}},
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{ConditionOperators::Less, Regex{"(.+) < (.+)"}},
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{ConditionOperators::GreaterEqual, Regex{"(.+) >= (.+)"}},
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{ConditionOperators::LessEqual, Regex{"(.+) <= (.+)"}},
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{ConditionOperators::Different, Regex{"(.+) != (.+)"}}
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};
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enum class Function {
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Upper,
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Lower,
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@@ -266,218 +230,74 @@ public:
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Odd,
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Even
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};
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const std::map<Function, Regex> regex_map_functions = {
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{Function::Upper, Regex{"upper\\(\\s*(.*?)\\s*\\)"}},
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{Function::Lower, Regex{"lower\\(\\s*(.*?)\\s*\\)"}},
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{Function::Range, Regex{"range\\(\\s*(.*?)\\s*\\)"}},
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{Function::Length, Regex{"length\\(\\s*(.*?)\\s*\\)"}},
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{Function::Round, Regex{"round\\(\\s*(.*?)\\s*,\\s*(.*?)\\s*\\)"}},
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{Function::DivisibleBy, Regex{"divisibleBy\\(\\s*(.*?)\\s*,\\s*(.*?)\\s*\\)"}},
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{Function::Odd, Regex{"odd\\(\\s*(.*?)\\s*\\)"}},
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{Function::Even, Regex{"even\\(\\s*(.*?)\\s*\\)"}}
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};
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Parser() { }
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json element(Type type, json element_data) {
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element_data["type"] = type;
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return element_data;
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}
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json parse_level(const std::string& input) {
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json result;
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std::vector<Regex> regex_delimiters = get_values(regex_map_delimiters);
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size_t current_position = 0;
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Match match_delimiter = search(input, regex_delimiters, current_position);
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while (match_delimiter.found()) {
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current_position = match_delimiter.end_position();
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std::string string_prefix = match_delimiter.prefix();
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if (not string_prefix.empty()) {
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result += element(Type::String, {{"text", string_prefix}});
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}
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std::string delimiter_inner = match_delimiter.str(1);
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switch ( static_cast<Delimiter>(match_delimiter.regex_number()) ) {
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case Delimiter::Statement:
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case Delimiter::LineStatement: {
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Match match_statement = match(delimiter_inner, get_values(regex_map_statement_openers));
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switch ( static_cast<Statement>(match_statement.regex_number()) ) {
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case Statement::Loop: {
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MatchClosed loop_match = search_closed(input, match_delimiter.regex(), regex_loop_open, regex_loop_close, match_delimiter);
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current_position = loop_match.end_position();
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std::string loop_command = match_statement.str(0);
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result += element(Type::Loop, {{"command", loop_command}, {"inner", loop_match.inner()}});
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break;
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}
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case Statement::Condition: {
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json condition_result = element(Parser::Type::Condition, {{"children", json::array()}});
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Match condition_match = match_delimiter;
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MatchClosed else_if_match = search_closed_on_level(input, match_delimiter.regex(), regex_condition_open, regex_condition_close, regex_condition_else_if, condition_match);
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while (else_if_match.found()) {
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condition_match = else_if_match.close_match;
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condition_result["children"] += element(Type::ConditionBranch, {{"command", else_if_match.open_match.str(1)}, {"inner", else_if_match.inner()}});
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else_if_match = search_closed_on_level(input, match_delimiter.regex(), regex_condition_open, regex_condition_close, regex_condition_else_if, condition_match);
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}
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MatchClosed else_match = search_closed_on_level(input, match_delimiter.regex(), regex_condition_open, regex_condition_close, regex_condition_else, condition_match);
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if (else_match.found()) {
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condition_match = else_match.close_match;
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condition_result["children"] += element(Type::ConditionBranch, {{"command", else_match.open_match.str(1)}, {"inner", else_match.inner()}});
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}
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MatchClosed last_if_match = search_closed(input, match_delimiter.regex(), regex_condition_open, regex_condition_close, condition_match);
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condition_result["children"] += element(Type::ConditionBranch, {{"command", last_if_match.open_match.str(1)}, {"inner", last_if_match.inner()}});
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current_position = last_if_match.end_position();
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result += condition_result;
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break;
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}
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case Statement::Include: {
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std::string filename = match_statement.str(1);
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result += element(Type::Include, {{"filename", filename}});
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break;
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}
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default: { throw std::runtime_error("Parser error: Unknown statement."); }
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}
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break;
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}
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case Delimiter::Expression: {
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result += element(Type::Variable, {{"command", delimiter_inner}});
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break;
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}
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case Delimiter::Comment: {
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result += element(Type::Comment, {{"text", delimiter_inner}});
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break;
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}
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default: { throw std::runtime_error("Parser error: Unknown delimiter."); }
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}
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match_delimiter = search(input, regex_delimiters, current_position);
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}
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if (current_position < input.length()) {
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result += element(Parser::Type::String, {{"text", input.substr(current_position)}});
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}
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return result;
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}
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json parse_tree(json current_element) {
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if (current_element.find("inner") != current_element.end()) {
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current_element["children"] = parse_level(current_element["inner"]);
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current_element.erase("inner");
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}
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if (current_element.find("children") != current_element.end()) {
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for (auto& child: current_element["children"]) {
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child = parse_tree(child);
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}
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}
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return current_element;
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}
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json parse(const std::string& input) {
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return parse_tree({{"inner", input}})["children"];
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}
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};
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class Environment {
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const std::string global_path;
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ElementNotation elementNotation = ElementNotation::Pointer;
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Parser parser;
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class Template {
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public:
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Environment(): Environment("./") { }
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explicit Environment(const std::string& global_path): global_path(global_path), parser() { }
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void setStatement(const std::string& open, const std::string& close) {
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parser.regex_map_delimiters[Parser::Delimiter::Statement] = Regex{open + "\\s*(.+?)\\s*" + close};
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}
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void setLineStatement(const std::string& open) {
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parser.regex_map_delimiters[Parser::Delimiter::LineStatement] = Regex{"(?:^|\\n)" + open + "\\s*(.+)\\s*"};
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}
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void setExpression(const std::string& open, const std::string& close) {
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parser.regex_map_delimiters[Parser::Delimiter::Expression] = Regex{open + "\\s*(.+?)\\s*" + close};
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}
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void setComment(const std::string& open, const std::string& close) {
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parser.regex_map_delimiters[Parser::Delimiter::Comment] = Regex{open + "\\s*(.+?)\\s*" + close};
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}
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void setElementNotation(const ElementNotation elementNotation_) {
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elementNotation = elementNotation_;
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}
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const json parsed_template;
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ElementNotation elementNotation;
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explicit Template(const json parsed_template): parsed_template(parsed_template) { }
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explicit Template(const json parsed_template, ElementNotation elementNotation): parsed_template(parsed_template), elementNotation(elementNotation) { }
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template<typename T = json>
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T eval_variable(const std::string& input, json data) {
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const json var = eval_variable(input, data, true);
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T eval_variable(json element, json data) {
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const json var = eval_variable(element, data, true);
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if (std::is_same<T, json>::value) { return var; }
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return var.get<T>();
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}
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json eval_variable(const std::string& input, json data, bool throw_error) {
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// Json Raw Data
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if ( json::accept(input) ) { return json::parse(input); }
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Match match_function = match(input, get_values(parser.regex_map_functions));
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switch ( static_cast<Parser::Function>(match_function.regex_number()) ) {
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case Parser::Function::Upper: {
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std::string str = eval_variable<std::string>(match_function.str(1), data);
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std::transform(str.begin(), str.end(), str.begin(), toupper);
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return str;
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}
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case Parser::Function::Lower: {
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std::string str = eval_variable<std::string>(match_function.str(1), data);
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std::transform(str.begin(), str.end(), str.begin(), tolower);
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return str;
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}
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case Parser::Function::Range: {
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const int number = eval_variable<int>(match_function.str(1), data);
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std::vector<int> result(number);
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std::iota(std::begin(result), std::end(result), 0);
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return result;
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}
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case Parser::Function::Length: {
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const std::vector<json> list = eval_variable<std::vector<json>>(match_function.str(1), data);
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return list.size();
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}
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case Parser::Function::Round: {
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const double number = eval_variable<double>(match_function.str(1), data);
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const int precision = eval_variable<int>(match_function.str(2), data);
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return std::round(number * std::pow(10.0, precision)) / std::pow(10.0, precision);
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}
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case Parser::Function::DivisibleBy: {
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const int number = eval_variable<int>(match_function.str(1), data);
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const int divisor = eval_variable<int>(match_function.str(2), data);
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return (number % divisor == 0);
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}
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case Parser::Function::Odd: {
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const int number = eval_variable<int>(match_function.str(1), data);
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return (number % 2 != 0);
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}
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case Parser::Function::Even: {
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const int number = eval_variable<int>(match_function.str(1), data);
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return (number % 2 == 0);
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json eval_variable(json element, json data, bool throw_error) {
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if (element.find("function") != element.end()) {
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switch ( static_cast<Parsed::Function>(element["function"]) ) {
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case Parsed::Function::Upper: {
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std::string str = eval_variable<std::string>(element["arg1"], data);
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std::transform(str.begin(), str.end(), str.begin(), toupper);
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return str;
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}
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case Parsed::Function::Lower: {
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std::string str = eval_variable<std::string>(element["arg1"], data);
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std::transform(str.begin(), str.end(), str.begin(), tolower);
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return str;
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}
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case Parsed::Function::Range: {
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const int number = eval_variable<int>(element["arg1"], data);
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std::vector<int> result(number);
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std::iota(std::begin(result), std::end(result), 0);
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return result;
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}
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case Parsed::Function::Length: {
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const std::vector<json> list = eval_variable<std::vector<json>>(element["arg1"], data);
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return list.size();
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}
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case Parsed::Function::Round: {
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const double number = eval_variable<double>(element["arg1"], data);
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const int precision = eval_variable<int>(element["arg2"], data);
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return std::round(number * std::pow(10.0, precision)) / std::pow(10.0, precision);
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}
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case Parsed::Function::DivisibleBy: {
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const int number = eval_variable<int>(element["arg1"], data);
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const int divisor = eval_variable<int>(element["arg2"], data);
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return (number % divisor == 0);
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}
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case Parsed::Function::Odd: {
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const int number = eval_variable<int>(element["arg1"], data);
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return (number % 2 != 0);
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}
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case Parsed::Function::Even: {
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const int number = eval_variable<int>(element["arg1"], data);
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return (number % 2 == 0);
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}
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}
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}
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const std::string input = element["command"];
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// Json Raw Data
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if ( json::accept(input) ) { return json::parse(input); }
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std::string input_copy = input;
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switch (elementNotation) {
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case ElementNotation::Pointer: {
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@@ -497,44 +317,45 @@ public:
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return result;
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}
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bool eval_condition(const std::string& condition, json data) {
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Match match_condition = match(condition, get_values(parser.regex_map_condition_operators));
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switch ( static_cast<Parser::ConditionOperators>(match_condition.regex_number()) ) {
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case Parser::ConditionOperators::Not: {
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return not eval_condition(match_condition.str(1), data);
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}
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case Parser::ConditionOperators::And: {
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return (eval_condition(match_condition.str(1), data) and eval_condition(match_condition.str(2), data));
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}
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case Parser::ConditionOperators::Or: {
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return (eval_condition(match_condition.str(1), data) or eval_condition(match_condition.str(2), data));
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}
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case Parser::ConditionOperators::In: {
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const json item = eval_variable(match_condition.str(1), data);
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const json list = eval_variable(match_condition.str(2), data);
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return (std::find(list.begin(), list.end(), item) != list.end());
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}
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case Parser::ConditionOperators::Equal: {
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return eval_variable(match_condition.str(1), data) == eval_variable(match_condition.str(2), data);
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}
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case Parser::ConditionOperators::Greater: {
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return eval_variable(match_condition.str(1), data) > eval_variable(match_condition.str(2), data);
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}
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case Parser::ConditionOperators::Less: {
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return eval_variable(match_condition.str(1), data) < eval_variable(match_condition.str(2), data);
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}
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case Parser::ConditionOperators::GreaterEqual: {
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return eval_variable(match_condition.str(1), data) >= eval_variable(match_condition.str(2), data);
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}
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case Parser::ConditionOperators::LessEqual: {
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return eval_variable(match_condition.str(1), data) <= eval_variable(match_condition.str(2), data);
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}
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case Parser::ConditionOperators::Different: {
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return eval_variable(match_condition.str(1), data) != eval_variable(match_condition.str(2), data);
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bool eval_condition(json element, json data) {
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if (element.find("condition") != element.end()) {
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switch ( static_cast<Parsed::ConditionOperators>(element["condition"]) ) {
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case Parsed::ConditionOperators::Not: {
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return not eval_condition(element["arg1"], data);
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}
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case Parsed::ConditionOperators::And: {
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return (eval_condition(element["arg1"], data) and eval_condition(element["arg2"], data));
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}
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case Parsed::ConditionOperators::Or: {
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return (eval_condition(element["arg1"], data) or eval_condition(element["arg2"], data));
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}
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case Parsed::ConditionOperators::In: {
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const json item = eval_variable(element["arg1"], data);
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const json list = eval_variable(element["arg2"], data);
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return (std::find(list.begin(), list.end(), item) != list.end());
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}
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case Parsed::ConditionOperators::Equal: {
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return eval_variable(element["arg1"], data) == eval_variable(element["arg2"], data);
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}
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case Parsed::ConditionOperators::Greater: {
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return eval_variable(element["arg1"], data) > eval_variable(element["arg2"], data);
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}
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case Parsed::ConditionOperators::Less: {
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return eval_variable(element["arg1"], data) < eval_variable(element["arg2"], data);
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}
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case Parsed::ConditionOperators::GreaterEqual: {
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return eval_variable(element["arg1"], data) >= eval_variable(element["arg2"], data);
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}
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case Parsed::ConditionOperators::LessEqual: {
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return eval_variable(element["arg1"], data) <= eval_variable(element["arg2"], data);
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}
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case Parsed::ConditionOperators::Different: {
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return eval_variable(element["arg1"], data) != eval_variable(element["arg2"], data);
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}
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}
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}
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const json var = eval_variable(condition, data, false);
|
||||
const json var = eval_variable(element, data, false);
|
||||
if (var.empty()) { return false; }
|
||||
else if (var.is_boolean()) { return var; }
|
||||
else if (var.is_number()) { return (var != 0); }
|
||||
@@ -542,91 +363,388 @@ public:
|
||||
return true;
|
||||
}
|
||||
|
||||
std::string render_json(json data) {
|
||||
if (data.is_string()) { return data; }
|
||||
|
||||
std::stringstream ss;
|
||||
ss << data;
|
||||
return ss.str();
|
||||
}
|
||||
|
||||
std::string render_tree(json input, json data, const std::string& path) {
|
||||
std::string render(json data) {
|
||||
std::string result = "";
|
||||
for (auto element: input) {
|
||||
switch ( static_cast<Parser::Type>(element["type"]) ) {
|
||||
case Parser::Type::String: {
|
||||
for (auto element: parsed_template) {
|
||||
switch ( static_cast<Parsed::Type>(element["type"]) ) {
|
||||
case Parsed::Type::String: {
|
||||
result += element["text"].get<std::string>();
|
||||
break;
|
||||
}
|
||||
case Parser::Type::Variable: {
|
||||
json variable = eval_variable(element["command"], data);
|
||||
result += render_json(variable);
|
||||
case Parsed::Type::Expression: {
|
||||
json variable = eval_variable(element, data);
|
||||
if (variable.is_string()) {
|
||||
result += variable.get<std::string>();
|
||||
} else {
|
||||
std::stringstream ss;
|
||||
ss << variable;
|
||||
result += ss.str();
|
||||
}
|
||||
break;
|
||||
}
|
||||
case Parser::Type::Include: {
|
||||
result += render_template(path + element["filename"].get<std::string>(), data);
|
||||
break;
|
||||
}
|
||||
case Parser::Type::Loop: {
|
||||
const std::string command = element["command"].get<std::string>();
|
||||
Match match_command;
|
||||
if (std::regex_match(command, match_command, parser.regex_loop_in_list)) {
|
||||
const std::string item_name = match_command.str(1);
|
||||
const std::string list_name = match_command.str(2);
|
||||
case Parsed::Type::Loop: {
|
||||
const std::string item_name = element["item"].get<std::string>();
|
||||
|
||||
std::vector<json> list = eval_variable<std::vector<json>>(list_name, data);
|
||||
for (int i = 0; i < list.size(); i++) {
|
||||
json data_loop = data;
|
||||
data_loop[item_name] = list[i];
|
||||
data_loop["index"] = i;
|
||||
data_loop["index1"] = i + 1;
|
||||
data_loop["is_first"] = (i == 0);
|
||||
data_loop["is_last"] = (i == list.size() - 1);
|
||||
result += render_tree(element["children"], data_loop, path);
|
||||
}
|
||||
std::vector<json> list = eval_variable<std::vector<json>>(element["list"], data);
|
||||
for (int i = 0; i < list.size(); i++) {
|
||||
json data_loop = data;
|
||||
data_loop[item_name] = list[i];
|
||||
data_loop["index"] = i;
|
||||
data_loop["index1"] = i + 1;
|
||||
data_loop["is_first"] = (i == 0);
|
||||
data_loop["is_last"] = (i == list.size() - 1);
|
||||
result += Template(element["children"], elementNotation).render(data_loop);
|
||||
}
|
||||
else { throw std::runtime_error("Unknown loop in renderer."); }
|
||||
break;
|
||||
}
|
||||
case Parser::Type::Condition: {
|
||||
const Regex regex_condition{"(if|else if|else) ?(.*)"};
|
||||
|
||||
case Parsed::Type::Condition: {
|
||||
for (auto branch: element["children"]) {
|
||||
const std::string command = branch["command"].get<std::string>();
|
||||
Match match_command;
|
||||
if (std::regex_match(command, match_command, regex_condition)) {
|
||||
std::string condition_type = match_command.str(1);
|
||||
std::string condition = match_command.str(2);
|
||||
|
||||
if (eval_condition(condition, data) || condition_type == "else") {
|
||||
result += render_tree(branch["children"], data, path);
|
||||
break;
|
||||
}
|
||||
if (eval_condition(branch["condition"], data) || branch["condition_type"] == "else") {
|
||||
result += Template(branch["children"], elementNotation).render(data);
|
||||
break;
|
||||
}
|
||||
else { throw std::runtime_error("Unknown condition in renderer."); }
|
||||
}
|
||||
break;
|
||||
}
|
||||
case Parser::Type::Comment: { break; }
|
||||
case Parsed::Type::Comment: { break; }
|
||||
default: { throw std::runtime_error("Unknown type in renderer."); }
|
||||
}
|
||||
}
|
||||
return result;
|
||||
}
|
||||
};
|
||||
|
||||
std::string render(const std::string& input, json data, const std::string& path) {
|
||||
json parsed = parser.parse(input);
|
||||
return render_tree(parsed, data, path);
|
||||
|
||||
class Parser {
|
||||
public:
|
||||
std::map<Parsed::Delimiter, Regex> regex_map_delimiters = {
|
||||
{Parsed::Delimiter::Statement, Regex{"\\{\\%\\s*(.+?)\\s*\\%\\}"}},
|
||||
{Parsed::Delimiter::LineStatement, Regex{"(?:^|\\n)##\\s*(.+)\\s*"}},
|
||||
{Parsed::Delimiter::Expression, Regex{"\\{\\{\\s*(.+?)\\s*\\}\\}"}},
|
||||
{Parsed::Delimiter::Comment, Regex{"\\{#\\s*(.*?)\\s*#\\}"}}
|
||||
};
|
||||
|
||||
const std::map<Parsed::Statement, Regex> regex_map_statement_openers = {
|
||||
{Parsed::Statement::Loop, Regex{"for (.*)"}},
|
||||
{Parsed::Statement::Condition, Regex{"if (.*)"}},
|
||||
{Parsed::Statement::Include, Regex{"include \"(.*)\""}}
|
||||
};
|
||||
|
||||
const Regex regex_loop_open = regex_map_statement_openers.at(Parsed::Statement::Loop);
|
||||
const Regex regex_loop_in_list{"for (\\w+) in (.+)"};
|
||||
const Regex regex_loop_close{"endfor"};
|
||||
|
||||
const Regex regex_condition_open = regex_map_statement_openers.at(Parsed::Statement::Condition);
|
||||
const Regex regex_condition_else_if{"else if (.*)"};
|
||||
const Regex regex_condition_else{"else"};
|
||||
const Regex regex_condition_close{"endif"};
|
||||
|
||||
const std::map<Parsed::ConditionOperators, Regex> regex_map_condition_operators = {
|
||||
{Parsed::ConditionOperators::Not, Regex{"not (.+)"}},
|
||||
{Parsed::ConditionOperators::And, Regex{"(.+) and (.+)"}},
|
||||
{Parsed::ConditionOperators::Or, Regex{"(.+) or (.+)"}},
|
||||
{Parsed::ConditionOperators::In, Regex{"(.+) in (.+)"}},
|
||||
{Parsed::ConditionOperators::Equal, Regex{"(.+) == (.+)"}},
|
||||
{Parsed::ConditionOperators::Greater, Regex{"(.+) > (.+)"}},
|
||||
{Parsed::ConditionOperators::Less, Regex{"(.+) < (.+)"}},
|
||||
{Parsed::ConditionOperators::GreaterEqual, Regex{"(.+) >= (.+)"}},
|
||||
{Parsed::ConditionOperators::LessEqual, Regex{"(.+) <= (.+)"}},
|
||||
{Parsed::ConditionOperators::Different, Regex{"(.+) != (.+)"}}
|
||||
};
|
||||
|
||||
const std::map<Parsed::Function, Regex> regex_map_functions = {
|
||||
{Parsed::Function::Upper, Regex{"upper\\(\\s*(.*?)\\s*\\)"}},
|
||||
{Parsed::Function::Lower, Regex{"lower\\(\\s*(.*?)\\s*\\)"}},
|
||||
{Parsed::Function::Range, Regex{"range\\(\\s*(.*?)\\s*\\)"}},
|
||||
{Parsed::Function::Length, Regex{"length\\(\\s*(.*?)\\s*\\)"}},
|
||||
{Parsed::Function::Round, Regex{"round\\(\\s*(.*?)\\s*,\\s*(.*?)\\s*\\)"}},
|
||||
{Parsed::Function::DivisibleBy, Regex{"divisibleBy\\(\\s*(.*?)\\s*,\\s*(.*?)\\s*\\)"}},
|
||||
{Parsed::Function::Odd, Regex{"odd\\(\\s*(.*?)\\s*\\)"}},
|
||||
{Parsed::Function::Even, Regex{"even\\(\\s*(.*?)\\s*\\)"}}
|
||||
};
|
||||
|
||||
Parser() { }
|
||||
|
||||
json element(Parsed::Type type, json element_data) {
|
||||
element_data["type"] = type;
|
||||
return element_data;
|
||||
}
|
||||
|
||||
json element_function(Parsed::Function func, int number_args, Match match) {
|
||||
json result = element(Parsed::Type::Expression, {{"function", func}});
|
||||
for (int i = 1; i < number_args + 1; i++) {
|
||||
result["arg" + std::to_string(i)] = parse_expression(match.str(i));
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
json element_condition(Parsed::ConditionOperators op, int number_args, Match match) {
|
||||
json result = element(Parsed::Type::Expression, {{"condition", op}});
|
||||
for (int i = 1; i < number_args + 1; i++) {
|
||||
result["arg" + std::to_string(i)] = parse_expression(match.str(i));
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
json parse_expression(const std::string& input) {
|
||||
Match match_function = match(input, get_values(regex_map_functions));
|
||||
switch ( static_cast<Parsed::Function>(match_function.regex_number()) ) {
|
||||
case Parsed::Function::Upper: {
|
||||
return element_function(Parsed::Function::Upper, 1, match_function);
|
||||
}
|
||||
case Parsed::Function::Lower: {
|
||||
return element_function(Parsed::Function::Lower, 1, match_function);
|
||||
}
|
||||
case Parsed::Function::Range: {
|
||||
return element_function(Parsed::Function::Range, 1, match_function);
|
||||
}
|
||||
case Parsed::Function::Length: {
|
||||
return element_function(Parsed::Function::Length, 1, match_function);
|
||||
}
|
||||
case Parsed::Function::Round: {
|
||||
return element_function(Parsed::Function::Round, 2, match_function);
|
||||
}
|
||||
case Parsed::Function::DivisibleBy: {
|
||||
return element_function(Parsed::Function::DivisibleBy, 2, match_function);
|
||||
}
|
||||
case Parsed::Function::Odd: {
|
||||
return element_function(Parsed::Function::Odd, 1, match_function);
|
||||
}
|
||||
case Parsed::Function::Even: {
|
||||
return element_function(Parsed::Function::Even, 1, match_function);
|
||||
}
|
||||
}
|
||||
|
||||
return element(Parsed::Type::Expression, {{"command", input}});
|
||||
}
|
||||
|
||||
json parse_condition(const std::string& input) {
|
||||
Match match_condition = match(input, get_values(regex_map_condition_operators));
|
||||
|
||||
switch ( static_cast<Parsed::ConditionOperators>(match_condition.regex_number()) ) {
|
||||
case Parsed::ConditionOperators::Not: {
|
||||
return element_condition(Parsed::ConditionOperators::Not, 1, match_condition);
|
||||
}
|
||||
case Parsed::ConditionOperators::And: {
|
||||
return element_condition(Parsed::ConditionOperators::And, 2, match_condition);
|
||||
}
|
||||
case Parsed::ConditionOperators::Or: {
|
||||
return element_condition(Parsed::ConditionOperators::Or, 2, match_condition);
|
||||
}
|
||||
case Parsed::ConditionOperators::In: {
|
||||
return element_condition(Parsed::ConditionOperators::In, 2, match_condition);
|
||||
}
|
||||
case Parsed::ConditionOperators::Equal: {
|
||||
return element_condition(Parsed::ConditionOperators::Equal, 2, match_condition);
|
||||
}
|
||||
case Parsed::ConditionOperators::Greater: {
|
||||
return element_condition(Parsed::ConditionOperators::Greater, 2, match_condition);
|
||||
}
|
||||
case Parsed::ConditionOperators::Less: {
|
||||
return element_condition(Parsed::ConditionOperators::Less, 2, match_condition);
|
||||
}
|
||||
case Parsed::ConditionOperators::GreaterEqual: {
|
||||
return element_condition(Parsed::ConditionOperators::GreaterEqual, 2, match_condition);
|
||||
}
|
||||
case Parsed::ConditionOperators::LessEqual: {
|
||||
return element_condition(Parsed::ConditionOperators::LessEqual, 2, match_condition);
|
||||
}
|
||||
case Parsed::ConditionOperators::Different: {
|
||||
return element_condition(Parsed::ConditionOperators::Different, 2, match_condition);
|
||||
}
|
||||
}
|
||||
|
||||
return element(Parsed::Type::Expression, {{"command", input}});
|
||||
}
|
||||
|
||||
json parse_level(const std::string& input, const std::string& path) {
|
||||
json result;
|
||||
|
||||
std::vector<Regex> regex_delimiters = get_values(regex_map_delimiters);
|
||||
|
||||
size_t current_position = 0;
|
||||
Match match_delimiter = search(input, regex_delimiters, current_position);
|
||||
while (match_delimiter.found()) {
|
||||
current_position = match_delimiter.end_position();
|
||||
std::string string_prefix = match_delimiter.prefix();
|
||||
if (not string_prefix.empty()) {
|
||||
result += element(Parsed::Type::String, {{"text", string_prefix}});
|
||||
}
|
||||
|
||||
std::string delimiter_inner = match_delimiter.str(1);
|
||||
|
||||
switch ( static_cast<Parsed::Delimiter>(match_delimiter.regex_number()) ) {
|
||||
case Parsed::Delimiter::Statement:
|
||||
case Parsed::Delimiter::LineStatement: {
|
||||
|
||||
Match match_statement = match(delimiter_inner, get_values(regex_map_statement_openers));
|
||||
switch ( static_cast<Parsed::Statement>(match_statement.regex_number()) ) {
|
||||
case Parsed::Statement::Loop: {
|
||||
MatchClosed loop_match = search_closed(input, match_delimiter.regex(), regex_loop_open, regex_loop_close, match_delimiter);
|
||||
|
||||
current_position = loop_match.end_position();
|
||||
const std::string loop_command = match_statement.str(0);
|
||||
|
||||
Match match_command;
|
||||
if (std::regex_match(loop_command, match_command, regex_loop_in_list)) {
|
||||
const std::string item_name = match_command.str(1);
|
||||
const std::string list_name = match_command.str(2);
|
||||
|
||||
result += element(Parsed::Type::Loop, {{"item", item_name}, {"list", parse_expression(list_name)}, {"inner", loop_match.inner()}});
|
||||
} else {
|
||||
throw std::runtime_error("Parser error: Unknown loop command.");
|
||||
}
|
||||
|
||||
break;
|
||||
}
|
||||
case Parsed::Statement::Condition: {
|
||||
json condition_result = element(Parsed::Type::Condition, {{"children", json::array()}});
|
||||
|
||||
const Regex regex_condition{"(if|else if|else) ?(.*)"};
|
||||
|
||||
Match condition_match = match_delimiter;
|
||||
|
||||
MatchClosed else_if_match = search_closed_on_level(input, match_delimiter.regex(), regex_condition_open, regex_condition_close, regex_condition_else_if, condition_match);
|
||||
while (else_if_match.found()) {
|
||||
condition_match = else_if_match.close_match;
|
||||
|
||||
Match match_command;
|
||||
if (std::regex_match(else_if_match.open_match.str(1), match_command, regex_condition)) {
|
||||
condition_result["children"] += element(Parsed::Type::ConditionBranch, {{"inner", else_if_match.inner()}, {"condition_type", match_command.str(1)}, {"condition", parse_condition(match_command.str(2))}});
|
||||
}
|
||||
|
||||
else_if_match = search_closed_on_level(input, match_delimiter.regex(), regex_condition_open, regex_condition_close, regex_condition_else_if, condition_match);
|
||||
}
|
||||
|
||||
MatchClosed else_match = search_closed_on_level(input, match_delimiter.regex(), regex_condition_open, regex_condition_close, regex_condition_else, condition_match);
|
||||
if (else_match.found()) {
|
||||
condition_match = else_match.close_match;
|
||||
|
||||
Match match_command;
|
||||
if (std::regex_match(else_match.open_match.str(1), match_command, regex_condition)) {
|
||||
condition_result["children"] += element(Parsed::Type::ConditionBranch, {{"inner", else_match.inner()}, {"condition_type", match_command.str(1)}, {"condition", parse_condition(match_command.str(2))}});
|
||||
}
|
||||
}
|
||||
|
||||
MatchClosed last_if_match = search_closed(input, match_delimiter.regex(), regex_condition_open, regex_condition_close, condition_match);
|
||||
|
||||
Match match_command;
|
||||
if (std::regex_match(last_if_match.open_match.str(1), match_command, regex_condition)) {
|
||||
condition_result["children"] += element(Parsed::Type::ConditionBranch, {{"inner", last_if_match.inner()}, {"condition_type", match_command.str(1)}, {"condition", parse_condition(match_command.str(2))}});
|
||||
}
|
||||
|
||||
current_position = last_if_match.end_position();
|
||||
result += condition_result;
|
||||
break;
|
||||
}
|
||||
case Parsed::Statement::Include: {
|
||||
std::string included_filename = path + match_statement.str(1);
|
||||
Template included_template = parse_template(included_filename);
|
||||
for (json element : included_template.parsed_template) {
|
||||
result += element;
|
||||
}
|
||||
break;
|
||||
}
|
||||
default: { throw std::runtime_error("Parser error: Unknown statement."); }
|
||||
}
|
||||
|
||||
break;
|
||||
}
|
||||
case Parsed::Delimiter::Expression: {
|
||||
result += parse_expression(delimiter_inner);
|
||||
break;
|
||||
}
|
||||
case Parsed::Delimiter::Comment: {
|
||||
result += element(Parsed::Type::Comment, {{"text", delimiter_inner}});
|
||||
break;
|
||||
}
|
||||
default: { throw std::runtime_error("Parser error: Unknown delimiter."); }
|
||||
}
|
||||
|
||||
match_delimiter = search(input, regex_delimiters, current_position);
|
||||
}
|
||||
if (current_position < input.length()) {
|
||||
result += element(Parsed::Type::String, {{"text", input.substr(current_position)}});
|
||||
}
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
json parse_tree(json current_element, const std::string& path) {
|
||||
if (current_element.find("inner") != current_element.end()) {
|
||||
current_element["children"] = parse_level(current_element["inner"], path);
|
||||
current_element.erase("inner");
|
||||
}
|
||||
if (current_element.find("children") != current_element.end()) {
|
||||
for (auto& child: current_element["children"]) {
|
||||
child = parse_tree(child, path);
|
||||
}
|
||||
}
|
||||
return current_element;
|
||||
}
|
||||
|
||||
Template parse(const std::string& input) {
|
||||
json parsed = parse_tree({{"inner", input}}, "./")["children"];
|
||||
return Template(parsed);
|
||||
}
|
||||
|
||||
Template parse_template(const std::string& filename) {
|
||||
std::string text = load_file(filename);
|
||||
std::string path = filename.substr(0, filename.find_last_of("/\\") + 1);
|
||||
json parsed = parse_tree({{"inner", text}}, path)["children"];
|
||||
return Template(parsed);
|
||||
}
|
||||
|
||||
std::string load_file(const std::string& filename) {
|
||||
std::ifstream file(filename);
|
||||
std::string text((std::istreambuf_iterator<char>(file)), std::istreambuf_iterator<char>());
|
||||
return text;
|
||||
}
|
||||
};
|
||||
|
||||
|
||||
|
||||
class Environment {
|
||||
const std::string global_path;
|
||||
|
||||
ElementNotation elementNotation = ElementNotation::Pointer;
|
||||
|
||||
Parser parser;
|
||||
|
||||
public:
|
||||
Environment(): Environment("./") { }
|
||||
explicit Environment(const std::string& global_path): global_path(global_path), parser() { }
|
||||
|
||||
void setStatement(const std::string& open, const std::string& close) {
|
||||
parser.regex_map_delimiters[Parsed::Delimiter::Statement] = Regex{open + "\\s*(.+?)\\s*" + close};
|
||||
}
|
||||
|
||||
void setLineStatement(const std::string& open) {
|
||||
parser.regex_map_delimiters[Parsed::Delimiter::LineStatement] = Regex{"(?:^|\\n)" + open + "\\s*(.+)\\s*"};
|
||||
}
|
||||
|
||||
void setExpression(const std::string& open, const std::string& close) {
|
||||
parser.regex_map_delimiters[Parsed::Delimiter::Expression] = Regex{open + "\\s*(.+?)\\s*" + close};
|
||||
}
|
||||
|
||||
void setComment(const std::string& open, const std::string& close) {
|
||||
parser.regex_map_delimiters[Parsed::Delimiter::Comment] = Regex{open + "\\s*(.+?)\\s*" + close};
|
||||
}
|
||||
|
||||
void setElementNotation(const ElementNotation elementNotation_) {
|
||||
elementNotation = elementNotation_;
|
||||
}
|
||||
|
||||
std::string render(const std::string& input, json data) {
|
||||
return render(input, data, "./");
|
||||
Template parsed = parser.parse(input);
|
||||
parsed.elementNotation = elementNotation;
|
||||
return parsed.render(data);
|
||||
}
|
||||
|
||||
std::string render_template(const std::string& filename, json data) {
|
||||
std::string text = load_file(filename);
|
||||
std::string path = filename.substr(0, filename.find_last_of("/\\") + 1);
|
||||
return render(text, data, path);
|
||||
Template parsed = parser.parse_template(global_path + filename);
|
||||
parsed.elementNotation = elementNotation;
|
||||
return parsed.render(data);
|
||||
}
|
||||
|
||||
std::string render_template_with_json_file(const std::string& filename, const std::string& filename_data) {
|
||||
@@ -645,10 +763,8 @@ public:
|
||||
write(filename, data, filename_out);
|
||||
}
|
||||
|
||||
std::string load_file(const std::string& filename) {
|
||||
std::ifstream file(global_path + filename);
|
||||
std::string text((std::istreambuf_iterator<char>(file)), std::istreambuf_iterator<char>());
|
||||
return text;
|
||||
std::string load_global_file(const std::string& filename) {
|
||||
return parser.load_file(global_path + filename);
|
||||
}
|
||||
|
||||
json load_json(const std::string& filename) {
|
||||
@@ -659,6 +775,8 @@ public:
|
||||
}
|
||||
};
|
||||
|
||||
|
||||
|
||||
/*!
|
||||
@brief render with default settings
|
||||
*/
|
||||
|
||||
Reference in New Issue
Block a user