Add Initial commit

CM2005 Object Oriented Programming/Midterm/Merkelrex-TradingBot/CSVReader.cpp

@@ -0,0 +1,105 @@
+#include "CSVReader.h"
+#include <iostream>
+#include <fstream>
+
+
+CSVReader::CSVReader()
+{
+
+}
+
+std::vector<OrderBookEntry> CSVReader::readCSV(std::string csvFilename)
+{
+    std::vector<OrderBookEntry> entries;
+
+    std::ifstream csvFile{csvFilename};
+    std::string line;
+    if (csvFile.is_open())
+    {
+        while(std::getline(csvFile, line))
+        {
+            try {
+                OrderBookEntry obe = stringsToOBE(tokenise(line, ','));
+                entries.push_back(obe);
+            }catch(const std::exception& e)
+            {
+                std::cout << "CSVReader::readCSV bad data"  << std::endl;
+            }
+        }// end of while
+    }    
+
+    std::cout << "CSVReader::readCSV read " << entries.size() << " entries"  << std::endl;
+    return entries; 
+}
+
+std::vector<std::string> CSVReader::tokenise(std::string csvLine, char separator)
+{
+   std::vector<std::string> tokens;
+   signed int start, end;
+   std::string token;
+    start = csvLine.find_first_not_of(separator, 0);
+    do{
+        end = csvLine.find_first_of(separator, start);
+        if (start == csvLine.length() || start == end) break;
+        if (end >= 0) token = csvLine.substr(start, end - start);
+        else token = csvLine.substr(start, csvLine.length() - start);
+        tokens.push_back(token);
+    start = end + 1;
+    }while(end > 0);
+
+   return tokens; 
+}
+
+OrderBookEntry CSVReader::stringsToOBE(std::vector<std::string> tokens)
+{
+    double price, amount;
+
+    if (tokens.size() != 5) // bad
+    {
+        std::cout << "Bad line " << std::endl;
+        throw std::exception{};
+    }
+    // we have 5 tokens
+    try {
+         price = std::stod(tokens[3]);
+         amount = std::stod(tokens[4]);
+    }catch(const std::exception& e){
+        std::cout << "CSVReader::stringsToOBE Bad float! " << tokens[3]<< std::endl;
+        std::cout << "CSVReader::stringsToOBE Bad float! " << tokens[4]<< std::endl; 
+        throw;        
+    }
+
+    OrderBookEntry obe{price, 
+                        amount, 
+                        tokens[0],
+                        tokens[1], 
+                        OrderBookEntry::stringToOrderBookType(tokens[2])};
+
+    return obe; 
+}
+
+
+OrderBookEntry CSVReader::stringsToOBE(std::string priceString, 
+                                    std::string amountString, 
+                                    std::string timestamp, 
+                                    std::string product, 
+                                    OrderBookType orderType)
+{
+    double price, amount;
+    try {
+         price = std::stod(priceString);
+         amount = std::stod(amountString);
+    }catch(const std::exception& e){
+        std::cout << "CSVReader::stringsToOBE Bad float! " << priceString<< std::endl;
+        std::cout << "CSVReader::stringsToOBE Bad float! " << amountString<< std::endl; 
+        throw;        
+    }
+    OrderBookEntry obe{price, 
+                    amount, 
+                    timestamp,
+                    product, 
+                    orderType};
+                
+    return obe;
+}
+