embolding cpp

cpp/string_embolding.cpp

@@ -0,0 +1,73 @@
+#include <iostream>
+#include <string>
+#include <vector>
+
+std::vector<bool> buildMask(const std::string& main_string, const std::vector<std::string>& substrings)
+{
+    std::vector<bool> bold_mask(main_string.size(), false);
+    for (const auto& substring : substrings)
+    {
+        const auto substring_index = main_string.find(substring);
+        if (substring_index != main_string.npos)
+        {
+            for (size_t mask_i = substring_index; mask_i < substring_index + substring.size(); ++mask_i)
+            {
+                bold_mask[mask_i] = true;
+            }
+        }
+    }
+
+    return bold_mask;
+}
+
+std::string emboldenString(const std::string& main_string, const std::vector<std::string>& substrings)
+{
+    std::vector<bool> bold_mask = buildMask(main_string, substrings);
+
+    std::string embolded_string;
+    bool is_bold_now = false;
+    for (size_t mask_i = 0; mask_i < bold_mask.size(); ++mask_i)
+    {
+        if (!is_bold_now)
+        {
+            if (bold_mask[mask_i])
+            {
+                embolded_string += "<b>";
+                embolded_string += main_string[mask_i];
+                is_bold_now = true;
+            }
+            else
+            {
+                embolded_string += main_string[mask_i];
+            }
+        }
+        else
+        {
+            if (bold_mask[mask_i])
+            {
+                embolded_string += main_string[mask_i];
+                
+            }
+            else
+            {
+                embolded_string += "</b>";
+                embolded_string += main_string[mask_i];
+                is_bold_now = false;
+            }
+        }
+    }
+
+    if (is_bold_now)
+    {
+        embolded_string += "</b>";
+    }
+    
+    return embolded_string;
+}
+
+int main()
+{
+    std::string main_string = "I despise leetcode kind of problems.";
+    std::vector<std::string> substrings = {"despise", "pise", "I", "s."};
+    std::cout << emboldenString(main_string, substrings) << '\n';
+}