2020-10-27 21:17:03 +00:00
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using System;
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using System.Collections.Generic;
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using System.Linq;
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2020-11-02 00:42:00 +00:00
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using System.Security.Cryptography;
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using System.Text;
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2020-10-27 21:17:03 +00:00
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namespace Jackett.Common.Models
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{
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public class TorznabCapabilitiesCategories
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{
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private readonly List<CategoryMapping> _categoryMapping = new List<CategoryMapping>();
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private readonly List<TorznabCategory> _torznabCategoryTree = new List<TorznabCategory>();
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public List<string> GetTrackerCategories() => _categoryMapping
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.Where(m => m.NewzNabCategory < 100000)
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.Select(m => m.TrackerCategory).Distinct().ToList();
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public List<TorznabCategory> GetTorznabCategoryTree(bool sorted = false)
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{
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if (!sorted)
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return _torznabCategoryTree;
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// we build a new tree, original is unsorted
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// first torznab categories ordered by id and then custom cats ordered by name
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var sortedTree = _torznabCategoryTree
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.Select(c =>
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{
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var sortedSubCats = c.SubCategories.OrderBy(x => x.ID);
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var newCat = new TorznabCategory(c.ID, c.Name);
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newCat.SubCategories.AddRange(sortedSubCats);
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return newCat;
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}).OrderBy(x => x.ID > 100000 ? "zzz" + x.Name : x.ID.ToString()).ToList();
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return sortedTree;
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}
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public List<TorznabCategory> GetTorznabCategoryList(bool sorted = false)
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{
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var tree = GetTorznabCategoryTree(sorted);
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// create a flat list (without subcategories)
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var newFlatList = new List<TorznabCategory>();
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foreach (var cat in tree)
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{
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newFlatList.Add(cat.CopyWithoutSubCategories());
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newFlatList.AddRange(cat.SubCategories);
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}
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return newFlatList;
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}
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public void AddCategoryMapping(string trackerCategory, TorznabCategory torznabCategory, string trackerCategoryDesc = null)
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{
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_categoryMapping.Add(new CategoryMapping(trackerCategory, trackerCategoryDesc, torznabCategory.ID));
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AddTorznabCategoryTree(torznabCategory);
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if (trackerCategoryDesc == null)
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return;
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// create custom cats (1:1 categories) if trackerCategoryDesc is defined
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// - if trackerCategory is "integer" we use that number to generate custom category id
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// - if trackerCategory is "string" we compute a hash to generate fixed integer id for the custom category
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// the hash is not perfect but it should work in most cases. we can't use sequential numbers because
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// categories are updated frequently and the id must be fixed to work in 3rd party apps
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if (!int.TryParse(trackerCategory, out var trackerCategoryInt))
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{
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var hashed = SHA1.Create().ComputeHash(Encoding.UTF8.GetBytes(trackerCategory));
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trackerCategoryInt = BitConverter.ToUInt16(hashed, 0); // id between 0 and 65535 < 100000
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}
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var customCat = new TorznabCategory(trackerCategoryInt + 100000, trackerCategoryDesc);
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_categoryMapping.Add(new CategoryMapping(trackerCategory, trackerCategoryDesc, customCat.ID));
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AddTorznabCategoryTree(customCat);
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}
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public List<string> MapTorznabCapsToTrackers(TorznabQuery query, bool mapChildrenCatsToParent = false)
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{
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var expandedQueryCats = ExpandTorznabQueryCategories(query, mapChildrenCatsToParent);
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var result = _categoryMapping
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.Where(c => expandedQueryCats.Contains(c.NewzNabCategory))
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.Select(mapping => mapping.TrackerCategory).Distinct().ToList();
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return result;
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}
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public ICollection<int> MapTrackerCatToNewznab(string trackerCategory)
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{
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if (string.IsNullOrWhiteSpace(trackerCategory))
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return new List<int>();
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var cats = _categoryMapping
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.Where(m =>
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!string.IsNullOrWhiteSpace(m.TrackerCategory) &&
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string.Equals(m.TrackerCategory, trackerCategory, StringComparison.InvariantCultureIgnoreCase))
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.Select(c => c.NewzNabCategory).ToList();
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return cats;
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}
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public ICollection<int> MapTrackerCatDescToNewznab(string trackerCategoryDesc)
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{
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if (string.IsNullOrWhiteSpace(trackerCategoryDesc))
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return new List<int>();
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var cats = _categoryMapping
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.Where(m =>
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!string.IsNullOrWhiteSpace(m.TrackerCategoryDesc) &&
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string.Equals(m.TrackerCategoryDesc, trackerCategoryDesc, StringComparison.InvariantCultureIgnoreCase))
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.Select(c => c.NewzNabCategory).ToList();
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return cats;
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}
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public bool SupportsCategories(int[] categories)
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{
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if (categories == null)
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return false;
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var subCategories = _torznabCategoryTree.SelectMany(c => c.SubCategories);
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var allCategories = _torznabCategoryTree.Concat(subCategories);
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var supportsCategory = allCategories.Any(i => categories.Any(c => c == i.ID));
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return supportsCategory;
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}
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public void Concat(TorznabCapabilitiesCategories rhs)
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{
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// exclude indexer specific categories (>= 100000)
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// we don't concat _categoryMapping because it makes no sense for the aggregate indexer
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rhs.GetTorznabCategoryList().Where(x => x.ID < 100000).ToList().ForEach(AddTorznabCategoryTree);
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}
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/// <summary>
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/// If there are parent categories in TorznabQuery.Categories the children categories are added
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/// </summary>
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/// <param name="query">Search query</param>
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/// <param name="mapChildrenCatsToParent">If enabled, children categories will add the parent category to the list</param>
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/// <returns></returns>
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public List<int> ExpandTorznabQueryCategories(TorznabQuery query, bool mapChildrenCatsToParent = false)
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{
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var expandedQueryCats = new List<int>();
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foreach (var queryCategory in query.Categories)
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{
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expandedQueryCats.Add(queryCategory);
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if (queryCategory >= 100000)
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continue;
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var parentCat = _torznabCategoryTree.FirstOrDefault(c => c.ID == queryCategory);
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if (parentCat != null)
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// if it's parent cat we add all the children
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expandedQueryCats.AddRange(parentCat.SubCategories.Select(c => c.ID));
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else if (mapChildrenCatsToParent)
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{
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// if it's child cat and mapChildrenCatsToParent is enabled we add the parent
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var queryCategoryTorznab = new TorznabCategory(queryCategory, "");
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parentCat = _torznabCategoryTree.FirstOrDefault(c => c.Contains(queryCategoryTorznab));
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if (parentCat != null)
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expandedQueryCats.Add(parentCat.ID);
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}
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}
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return expandedQueryCats.Distinct().ToList();
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}
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private void AddTorznabCategoryTree(TorznabCategory torznabCategory)
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{
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// build the category tree
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if (TorznabCatType.ParentCats.Contains(torznabCategory))
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{
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// parent cat
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if (!_torznabCategoryTree.Contains(torznabCategory))
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_torznabCategoryTree.Add(torznabCategory.CopyWithoutSubCategories());
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}
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else
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{
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// child or custom cat
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var parentCat = TorznabCatType.ParentCats.FirstOrDefault(c => c.Contains(torznabCategory));
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if (parentCat != null)
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{
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// child cat
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var nodeCat = _torznabCategoryTree.FirstOrDefault(c => c.Equals(parentCat));
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if (nodeCat != null)
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{
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// parent cat already exists
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if (!nodeCat.Contains(torznabCategory))
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nodeCat.SubCategories.Add(torznabCategory);
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}
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else
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{
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// create parent cat and add child
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nodeCat = parentCat.CopyWithoutSubCategories();
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nodeCat.SubCategories.Add(torznabCategory);
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_torznabCategoryTree.Add(nodeCat);
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}
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}
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else
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// custom cat
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_torznabCategoryTree.Add(torznabCategory);
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}
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}
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2020-10-27 21:17:03 +00:00
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}
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}
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