Ivan Shishkov

Shishkov_Ivan/0/Project.rb

@@ -0,0 +1,66 @@
+require 'roo';
+
+require 'roo-xls';
+
+require './WorkWithData.rb';
+
+funcs = FilesParse.new;
+months = {
+  'январь' => 1,
+  'февраль' => 2,
+  'март' => 3,
+  'апрель' => 4,
+  'май' => 5,
+  'июнь' => 6,
+  'июль' => 7,
+  'авуст' => 8,
+  'сентябрь' => 9,
+  'октябрь' => 10,
+  'ноябрь' => 11,
+  'декабрь' => 12,
+}
+
+regions = ['Brest', 
+  'Vitebsk',
+  'Gomel', 
+  'Grodno', 
+  'Minsk', 
+  'Minsk Region',
+  'Mogilyov']
+products = Hash.new
+filePaths =  Dir["./data/*"]
+
+filePaths.each{ |filePath|
+  fileInstance = funcs.getFile(filePath)
+
+  if fileInstance
+    funcs.fetchProductsData(fileInstance, products, regions)
+  end
+}
+loop {
+  puts "What price are you looking for?"
+
+  word = gets.chomp.downcase;
+
+  keys = funcs.findKeys(word, products);
+
+  if keys.length == 0
+    puts word.capitalize + " can not be found in database"
+  else
+    keys.each{|key|
+      puts ""
+      recentPriceData = funcs.getRecentPriceData(key, products, months)
+      puts key.capitalize + " is " + recentPriceData["price"].to_s + " BYN in Minsk these days."
+      minPrice = funcs.getMinPrice(products[key])
+      puts "Lowest was on " + minPrice["year"] +
+      "/" + months[minPrice["month"]].to_s +
+      " at price " + minPrice["price"].to_s + " BYN"
+      maxPrice = funcs.getMaxPrice(products[key])
+      puts "Maximum was on " + maxPrice["year"] +
+      "/" + months[maxPrice["month"]].to_s +
+      " at price " + maxPrice["price"].to_s + " BYN";
+    }
+
+  end
+  puts;
+}

Shishkov_Ivan/0/WorkWithData.rb

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+class FilesParse
+  def initialize
+    puts "work";
+  end
+  def getFile(filePath)
+    extention = filePath.split(".")[2];
+      case extention;
+      when "xls"
+        fileInstance = Roo::Excel.new(filePath);
+        return fileInstance;
+      when "xlsx"
+        fileInstance = Roo::Excelx.new(filePath);
+        return fileInstance;
+      else
+        puts "unsupported file type: " + filePath;
+        return nil;
+      end
+  end
+
+  def findKeys(word, products)
+    result = [];
+
+    products.keys.each{ |key|
+      if(key.include?(word))
+        result.push(key);
+      end
+    }
+    return result;
+  end
+
+  def fetchProductsData(fileInstance, products, regions)
+
+    for n in 9..fileInstance.last_row
+      if fileInstance.cell("E", n) == nil
+        next;
+      end
+
+      year = fileInstance.cell("A", 3).split(" ")[2];
+      month = fileInstance.cell("A", 3).split(" ")[1];
+
+      key = fileInstance.cell("A", n).strip.downcase;
+
+      if !products[key]
+        products[key] = Hash.new;
+      end
+      if !products[key][year]
+        products[key][year] = Hash.new;
+      end
+
+      products[key][year][month] = {
+        regions[0] => formatValue(fileInstance.cell("G", n), year),
+        regions[1] => formatValue(fileInstance.cell("I", n), year),
+        regions[2] => formatValue(fileInstance.cell("K", n), year),
+        regions[3] => formatValue(fileInstance.cell("M", n), year),
+        regions[4] => formatValue(fileInstance.cell("O", n), year),
+        regions[5] => formatValue(fileInstance.cell("Q", n), year),
+        regions[6] => formatValue(fileInstance.cell("S", n), year)
+      }
+    end
+  end
+
+  def formatValue(val, year)
+    if val
+      result = val.to_f;
+
+      if year.to_i < 2017
+        result = result / 10000;
+      end
+
+      return result.round(2);
+    end
+  end
+
+  def getRecentPriceData(key, products, months)
+    currentYear = Time.now.strftime("%Y").to_s;
+
+    currentMonth = Time.now.strftime("%m");
+
+    months.each{|month, monthNumber|
+      if monthNumber == currentMonth
+        currentMonth == month
+      end
+    }
+
+    productYearData = products[key];
+
+    if productYearData[currentYear]
+      yearKey = currentYear;
+    else
+      yearKey = productYearData.keys.max{|a,b| a.to_i <=> b.to_i}
+    end
+
+    productMonthData = productYearData[yearKey];
+
+    if productMonthData[currentMonth]
+      monthKey = currentMonth;
+    else
+      monthKey = productMonthData.keys.max{|a,b| months[a] <=> months[b]}
+    end
+
+    return {
+      "price" => productMonthData[monthKey]["Minsk"],
+      "year" => yearKey,
+      "month" => monthKey
+    }
+  end
+
+  def getMinPrice(hash)
+    result = Hash.new;
+    minYearPrice = 9999999999999;
+
+    hash.each{|year, yearHash|
+      minMonthPrice = 9999999999999;
+      yearHash.each{|month, monthHash|
+        price = monthHash['Minsk']
+
+        if(price < minMonthPrice)
+          minMonthPrice = price
+          result['month'] = month;
+        end
+      }
+      if(minMonthPrice < minYearPrice)
+        minYearPrice = minMonthPrice;
+        result['year'] = year;
+        result['price'] = minYearPrice;
+      end
+    }
+    return result
+  end
+
+  def getMaxPrice(hash)
+    result = Hash.new;
+    maxYearPrice = 0;
+
+    hash.each{|year, yearHash|
+      maxMonthPrice = 0;
+      yearHash.each{|month, monthHash|
+        price = monthHash['Minsk']
+
+        if(price > maxMonthPrice)
+          maxMonthPrice = price;
+          result['month'] = month;
+        end
+      }
+      if(maxMonthPrice > maxYearPrice)
+        maxYearPrice = maxMonthPrice;
+        result['year'] = year;
+        result['price'] = maxYearPrice;
+      end
+    }
+    return result
+  end
+end