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#include <sstream>
#include "TXTParser.h"
#include "Color.h"
#include "Exception.h"
using namespace std;
unsigned int TXTParser::heuristic() {
bool grid = false;
int columns = 0;
int rows = 0;
int penalty = 1;
istringstream lines(this->get_file().read());
string line;
while (getline(lines, line)) {
if (line.back() == '\r') line.pop_back();
if (line.size() == 0) {
grid = true;
continue;
}
if (!grid) continue;
rows++;
if (columns == 0) columns = line.size();
penalty += abs(columns - static_cast<int>(line.size()));
}
if (grid == false) return 0;
if (columns == 1) penalty += 1000;
return (rows + columns) / penalty;
}
static void parse_header_def(MuseumDeserializer & d, const std::string & line) {
CanvasData data;
istringstream defs(line);
string def;
while (getline(defs, def, ',')) {
size_t equals = def.find("=");
if (equals == string::npos)
throw Exception("TXTParser: invalid def \"%s\"", def.c_str());
string key = def.substr(0, equals);
if (key == "rows") {
data.rows = stoi(def.substr(equals + 1));
continue;
}
if (key == "cols") {
data.columns = stoi(def.substr(equals + 1));
continue;
}
throw Exception("TXTParser: invalid key \"%s\"", key.c_str());
}
d.set_canvas(data);
}
static size_t header_idx(vector<string> header, string field) {
auto iter = find(header.begin(), header.end(), field);
if (iter == header.end())
throw Exception("header table is missing \"%s\" column", field.c_str());
return iter - header.begin();
}
static Color stocolor(const string & str) {
istringstream ss(str);
string red, green, blue;
getline(ss, red, ',');
getline(ss, green, ',');
getline(ss, blue, ',');
return {
.red = static_cast<unsigned int>(stoi(red)),
.green = static_cast<unsigned int>(stoi(green)),
.blue = static_cast<unsigned int>(stoi(blue)),
};
}
static void parse_header_table(MuseumDeserializer & d, const std::string & header, std::istringstream & rows) {
vector<string> table_header;
istringstream header_row(header);
string column;
while (getline(header_row, column, ','))
table_header.push_back(column);
size_t type_idx = header_idx(table_header, "letter");
size_t color_idx = header_idx(table_header, "rgb");
size_t weight_idx = header_idx(table_header, "weight");
string row;
while (getline(rows, row)) {
if (row.back() == '\r') row.pop_back();
if (row.size() == 0) break;
unsigned int col_idx = 0;
string col = "";
string stack = "";
vector<string> cols = {};
for (char c : row) {
if (c == stack.back()) {
stack.pop_back();
continue;
}
if (c == '[') {
stack.push_back(']');
continue;
}
if (stack.size() == 0 && c == ',') {
cols.push_back(col);
col.clear();
continue;
}
col.push_back(c);
}
if (col.size() > 0) cols.push_back(col);
if (cols.size() != 3)
throw Exception("invalid header table row");
d.add_type(
cols[type_idx],
stocolor(cols[color_idx]),
stoi(cols[weight_idx])
);
}
}
static void parse_header(MuseumDeserializer & d, istringstream & input) {
string line;
while (getline(input, line)) {
if (line.back() == '\r') line.pop_back();
if (line.size() == 0) break;
if (line.find("=") != string::npos) {
parse_header_def(d, line);
} else {
parse_header_table(d, line, input);
break;
}
}
}
static void parse_canvas(MuseumDeserializer & d, istringstream & input) {
unsigned int x = 0, y = 0;
char c;
while (input.get(c)) {
if (c == '\r') continue;
if (c == '\n') {
x = 0;
y += 1;
continue;
}
d.set_tile({ .x = x, .y = y, .type = string(1, c), });
x += 1;
}
}
void TXTParser::parse(MuseumDeserializer & d) {
istringstream input(this->get_file().read());
parse_header(d, input);
parse_canvas(d, input);
}
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