requests to ofd

utils/utils.cpp

@@ -1,7 +1,10 @@
 #include "utils.h"
 
 #include <codecvt>
+#include <cstring>
+#include <iostream>
 #include <locale>
+#include <regex>
 #include <string>
 
 std::string to_utf8(std::wstring wide_string) {
@@ -42,3 +45,92 @@ std::vector<std::string> split(std::string s, std::string delimiter) {
 
     return result;
 }
+
+std::wstring substring_from_to(std::wstring& text, std::wstring from, std::wstring to) {
+    unsigned int start_pos = 0;
+    unsigned int end_pos = 0;
+
+    std::wstring substring;
+
+    std::wregex start_regex(from);
+    std::wregex end_regex(to);
+
+    for (std::wsregex_iterator it{text.begin(), text.end(), start_regex}, end{};
+         it != end; it++) {
+        start_pos = it->position() + it->str().size();
+        break;
+    }
+
+    if(text == from_utf8("")) return text;
+    substring = text.substr(start_pos, text.size());
+
+    for (std::wsregex_iterator it{substring.begin(), substring.end(), end_regex}, end{};
+         it != end; it++) {
+        end_pos = it->position();
+        break;
+    }
+
+    if (end_pos == 0) return substring;
+
+    substring = substring.substr(0, end_pos);
+
+    return substring;
+}
+
+std::wstring trim_html_response(std::wstring& check) {
+    std::wstring begin_check_marker = from_utf8("<!-- Products -->");
+    std::wstring end_check_marker = from_utf8("<!-- \\/Products -->");
+    std::wstring trimmed = substring_from_to(check, begin_check_marker, end_check_marker);
+    trimmed += from_utf8("\n</div>");
+    return trimmed;
+}
+
+std::vector<std::wstring> find_in_html(std::string& html, std::string regex, std::string html_start, std::string html_end) {
+    std::regex searching_regex(regex);
+
+    std::vector<std::wstring> parsed;
+    for (std::sregex_iterator it{html.begin(), html.end(), searching_regex}, end{};
+         it != end; it++) {
+
+        std::wstring found_entry = from_utf8(it->str());
+        std::wstring extracted = substring_from_to(found_entry, from_utf8(html_start), from_utf8(html_end));
+
+        parsed.push_back(extracted);
+    }
+    return parsed;
+}
+
+std::vector<std::wstring> find_products_in_html(std::string html) {
+    return find_in_html(html, "<div class=\"ifw-col ifw-col-1 text-left\"><b>.*<\\/b><\\/div>", "<div class=\"ifw-col ifw-col-1 text-left\"><b>", "<\\/b><\\/div>");
+}
+
+std::vector<std::wstring> find_amounts_in_html(std::string html) {
+    return find_in_html(html, "<span>\\d+<\\/span>", "<span>", "<\\/span>");
+}
+
+std::vector<std::wstring> find_prices_in_html(std::string html) {
+    return find_in_html(html, "X <\\/span><span>\\d+\\.\\d{2}<\\/span>", "X <\\/span><span>", "<\\/span>");
+}
+
+Check parseOfdRuAnswer(std::string html) {
+    std::wstring wstr_html = from_utf8(html);
+    std::string trimmed = to_utf8(trim_html_response(wstr_html));
+
+    std::vector<std::wstring> products = find_products_in_html(trimmed);
+    std::vector<std::wstring> amounts = find_amounts_in_html(trimmed);
+    std::vector<std::wstring> prices = find_prices_in_html(trimmed);
+
+    if ((products.size() + amounts.size() + prices.size())/products.size() != 3) {
+        std::cerr << "An error has occured during the parsing of html. Please, contact the developer." << std::endl;
+        std::exit(-1);
+    }
+
+    Check c;
+
+    for (int i = 0; i < products.size(); i ++) {
+        Goods goods(to_utf8(products[i]), std::stod(prices[i]), std::stod(amounts[i]));
+        c.add_goods(goods);
+    }
+
+    return c;
+}

utils/utils.h

@@ -3,6 +3,7 @@
 
 #include <string>
 #include <vector>
+#include "../check/check.h"
 
 std::string to_utf8(std::wstring wide_string);
 std::wstring from_utf8(std::string string);
@@ -14,4 +15,8 @@ bool vector_contains_element(const std::vector<T> &vector, const T &to_find);
 
 std::vector<std::string> split(std::string, std::string);
 
+Check parseOfdRuAnswer(std::string);
+
+std::wstring trim_html_response(std::wstring& check);
+
 #endif // UTILS_H