105 lines
3.0 KiB
C#
105 lines
3.0 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using Microsoft.EntityFrameworkCore;
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using Microsoft.Extensions.Caching.Memory;
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using Oqtane.Models;
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namespace Oqtane.Repository
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{
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public class AliasRepository : IAliasRepository
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{
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private MasterDBContext _db;
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private readonly IMemoryCache _cache;
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public AliasRepository(MasterDBContext context, IMemoryCache cache)
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{
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_db = context;
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_cache = cache;
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}
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public IEnumerable<Alias> GetAliases()
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{
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return _cache.GetOrCreate("aliases", entry =>
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{
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entry.SlidingExpiration = TimeSpan.FromMinutes(30);
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return _db.Alias.ToList();
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});
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}
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public Alias AddAlias(Alias alias)
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{
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_db.Alias.Add(alias);
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_db.SaveChanges();
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_cache.Remove("aliases");
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return alias;
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}
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public Alias UpdateAlias(Alias alias)
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{
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_db.Entry(alias).State = EntityState.Modified;
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_db.SaveChanges();
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_cache.Remove("aliases");
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return alias;
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}
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public Alias GetAlias(int aliasId)
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{
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return GetAlias(aliasId, true);
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}
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public Alias GetAlias(int aliasId, bool tracking)
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{
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if (tracking)
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{
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return _db.Alias.Find(aliasId);
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}
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else
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{
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return _db.Alias.AsNoTracking().FirstOrDefault(item => item.AliasId == aliasId);
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}
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}
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// lookup alias based on url - note that alias values are hierarchical
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public Alias GetAlias(string url)
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{
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Alias alias = null;
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List<Alias> aliases = GetAliases().ToList();
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var segments = url.Split(new[] { '/' }, StringSplitOptions.RemoveEmptyEntries);
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// iterate segments to find keywords
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int start = segments.Length;
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for (int i = 0; i < segments.Length; i++)
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{
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if (segments[i] == "api" || segments[i] == "pages" || segments[i] == "*")
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{
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start = i;
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break;
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}
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}
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// iterate segments in reverse order to find alias match
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for (int i = start; i > 0; i--)
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{
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alias = aliases.Find(item => item.Name.Equals(string.Join("/", segments, 0, i), StringComparison.OrdinalIgnoreCase));
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if (alias != null)
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{
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break; // found a matching alias
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}
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}
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// return fallback alias if none found
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return alias ?? aliases.Find(item => item.Name.Equals("*"));
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}
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public void DeleteAlias(int aliasId)
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{
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Alias alias = _db.Alias.Find(aliasId);
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_db.Alias.Remove(alias);
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_cache.Remove("aliases");
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_db.SaveChanges();
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}
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}
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}
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