113 lines
2.7 KiB
C#
113 lines
2.7 KiB
C#
using Microsoft.Extensions.Logging;
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using Microsoft.Extensions.Options;
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using System.Collections.Concurrent;
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using System.IO;
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using System.Text;
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using System.Xml.Linq;
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namespace zero.Backoffice.Services;
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public class IconService : IIconService
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{
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protected IOptions<BackofficeOptions> Options { get; set; }
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protected IBackofficeAssetFileSystem FileSystem { get; set; }
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protected ILogger<IconService> Logger { get; set; }
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protected ConcurrentBag<BackofficeIconSetPresentation> CachedSets { get; private set; } = new();
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protected string CachedSvg { get; set; }
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protected bool IsLoaded { get; set; }
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public IconService(IOptions<BackofficeOptions> options, IBackofficeAssetFileSystem fileSystem, ILogger<IconService> logger)
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{
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Options = options;
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FileSystem = fileSystem;
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Logger = logger;
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}
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/// <inheritdoc />
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public async Task<IEnumerable<BackofficeIconSetPresentation>> GetSets()
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{
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await EnsureIconsAreLoaded();
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return CachedSets;
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}
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/// <inheritdoc />
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public async Task<string> GetCompiledSvg()
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{
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await EnsureIconsAreLoaded();
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return CachedSvg;
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}
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async Task EnsureIconsAreLoaded()
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{
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if (IsLoaded)
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{
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return;
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}
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StringBuilder svg = new();
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foreach (BackofficeIconSet set in Options.Value.IconSets)
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{
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if (!await FileSystem.Exists(set.SpritePath))
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{
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Logger.LogWarning("Could not load icon set {alias} from path {path}", set.Alias, FileSystem.Map(set.SpritePath));
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continue;
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}
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using Stream stream = await FileSystem.StreamFile(set.SpritePath);
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XDocument xml = XDocument.Load(stream);
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IEnumerable<XElement> symbols = xml.Descendants().Where(x => x.Name.LocalName == "symbol");
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if (!symbols.Any())
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{
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Logger.LogWarning("Icon set {alias} does not contain any <symbol>", set.Alias);
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continue;
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}
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HashSet<string> icons = new();
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foreach (XElement symbol in symbols)
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{
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string symbolAlias = set.Prefix + "-" + symbol.Attribute("id").Value.ToString();
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symbol.SetAttributeValue("id", symbolAlias);
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svg.Append(symbol.ToString().RemoveNewLines());
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icons.Add(symbolAlias);
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}
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CachedSets.Add(new()
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{
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Alias = set.Alias,
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Name = set.Name,
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Prefix = set.Prefix,
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Icons = icons
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});
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}
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CachedSvg = svg.ToString();
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IsLoaded = true;
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}
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}
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public interface IIconService
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{
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/// <summary>
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/// Get all registered icon sets with all their containing icons
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/// </summary>
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Task<IEnumerable<BackofficeIconSetPresentation>> GetSets();
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/// <summary>
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/// Get compiled SVG string for alle registered icon sets
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/// </summary>
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Task<string> GetCompiledSvg();
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} |