107 lines
4.0 KiB
C#
107 lines
4.0 KiB
C#
using System;
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using System.Drawing;
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namespace CarManagerV3
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{
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/// <summary>
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/// The <c>ImageManager</c> class is responsible for managing car images, including fetching and storing them locally.
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/// </summary>
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internal class ImageManager
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{
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/// <summary>
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/// Initializes the image folder by creating it if it does not exist.
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/// </summary>
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public static void InitializeImageFolder()
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{
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string path = "images";
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if (!System.IO.Directory.Exists(path))
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{
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System.IO.Directory.CreateDirectory(path);
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}
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// Do not catch here. If we cannot create our images folder, the program wont work.
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}
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/// <summary>
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/// Generates the image path for a given car based on its attributes.
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/// </summary>
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/// <param name="car">The car.</param>
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/// <returns>The image path for this Car.</returns>
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public static string GetImagePath(Car car)
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{
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string basePath = "images/";
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string fileName = $"{car.Make}_{car.Model}_{car.Year}_{car.Color}.png";
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return basePath + fileName;
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}
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/// <summary>
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/// Gets the image for a given car, fetching it if necessary.
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/// </summary>
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/// <param name="car">The car.</param>
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/// <returns>The <see cref="Image"/> object for the car.</returns>
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public static Image GetImage(Car car)
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{
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InitializeImageFolder();
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FetchImage(car);
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string path = GetImagePath(car);
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// does image exist?
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try
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{
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if (System.IO.File.Exists(path))
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{
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return Image.FromFile(path);
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}
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}
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catch (Exception ex)
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{
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Console.Error.WriteLine($"Error loading image: {ex.Message}");
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}
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try
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{
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return Image.FromFile("images/no_image_available.png");
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}
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catch (Exception ex)
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{
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Console.Error.WriteLine($"Error loading fallback image: {ex.Message}");
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return null;
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}
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}
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/// <summary>
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/// Fetches an image for a Car from https://cdn.imagin.studio/getimage if it does not already exist locally and saves it to images/<c>Make_Model_Year_Color.webp</>.
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/// If the image cannot be fetched, a placeholder image is used instead.
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/// Uses example customer id "hrjavascript-mastery", because they wouldn't give me one. Stole this from a tutorial page. :)
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/// </summary>
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/// <param name="car">The car.</param>
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public static void FetchImage(Car car)
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{
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// Fetch the image from https://cdn.imagin.studio/getimage and save it to images/Make_Model_Year.webp
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// use params like this: ?customer=hrjavascript-mastery&zoomType=fullscreen&make={make}&modelFamily={model}&modelYear={year}&angle=front&paintDescription={color}&fileType=png
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// check if the image already exists
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string path = GetImagePath(car);
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if (System.IO.File.Exists(path))
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{
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return;
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}
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string url = $"https://cdn.imagin.studio/getimage?customer=hrjavascript-mastery&zoomType=fullscreen&make={car.Make}&modelFamily={car.Model}&modelYear={car.Year}&angle=front&paintDescription={car.Color}&fileType=png";
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//add Referer header to avoid 403 error
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using (var client = new System.Net.WebClient())
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{
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client.Headers.Add("Referer", "http://localhost");
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try
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{
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client.DownloadFile(url, path);
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}
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catch
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{
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// if error, use fallback image no_image_available.png
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System.IO.File.Copy("images/no_image_available.png", path);
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}
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}
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}
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}
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}
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