| 1 | package be.nikiroo.fanfix.library; |
| 2 | |
| 3 | import java.util.ArrayList; |
| 4 | import java.util.Collections; |
| 5 | import java.util.List; |
| 6 | |
| 7 | import be.nikiroo.fanfix.data.MetaData; |
| 8 | |
| 9 | public class MetaResultList { |
| 10 | private List<MetaData> metas; |
| 11 | |
| 12 | // Lazy lists: |
| 13 | // TODO: sync-protect them? |
| 14 | private List<String> sources; |
| 15 | private List<String> authors; |
| 16 | private List<String> tags; |
| 17 | |
| 18 | // can be null (will consider it empty) |
| 19 | public MetaResultList(List<MetaData> metas) { |
| 20 | if (metas == null) { |
| 21 | metas = new ArrayList<MetaData>(); |
| 22 | } |
| 23 | |
| 24 | Collections.sort(metas); |
| 25 | this.metas = metas; |
| 26 | } |
| 27 | |
| 28 | // not NULL |
| 29 | // sorted |
| 30 | public List<MetaData> getMetas() { |
| 31 | return metas; |
| 32 | } |
| 33 | |
| 34 | public List<String> getSources() { |
| 35 | if (sources == null) { |
| 36 | sources = new ArrayList<String>(); |
| 37 | for (MetaData meta : metas) { |
| 38 | if (!sources.contains(meta.getSource())) |
| 39 | sources.add(meta.getSource()); |
| 40 | } |
| 41 | } |
| 42 | |
| 43 | return sources; |
| 44 | } |
| 45 | |
| 46 | // A -> (A), A/ -> (A, A/*) if we can find something for "*" |
| 47 | public List<String> getSources(String source) { |
| 48 | List<String> linked = new ArrayList<String>(); |
| 49 | if (source != null && !source.isEmpty()) { |
| 50 | if (!source.endsWith("/")) { |
| 51 | linked.add(source); |
| 52 | } else { |
| 53 | linked.add(source.substring(0, source.length() - 1)); |
| 54 | for (String src : getSources()) { |
| 55 | if (src.startsWith(source)) { |
| 56 | linked.add(src); |
| 57 | } |
| 58 | } |
| 59 | } |
| 60 | } |
| 61 | |
| 62 | return linked; |
| 63 | } |
| 64 | |
| 65 | public List<String> getAuthors() { |
| 66 | if (authors == null) { |
| 67 | authors = new ArrayList<String>(); |
| 68 | for (MetaData meta : metas) { |
| 69 | if (!authors.contains(meta.getAuthor())) |
| 70 | authors.add(meta.getAuthor()); |
| 71 | } |
| 72 | } |
| 73 | |
| 74 | return authors; |
| 75 | } |
| 76 | |
| 77 | public List<String> getTags() { |
| 78 | if (tags == null) { |
| 79 | tags = new ArrayList<String>(); |
| 80 | for (MetaData meta : metas) { |
| 81 | for (String tag : meta.getTags()) { |
| 82 | if (!tags.contains(tag)) |
| 83 | tags.add(tag); |
| 84 | } |
| 85 | } |
| 86 | } |
| 87 | |
| 88 | return authors; |
| 89 | } |
| 90 | |
| 91 | // null or empty -> no check, rest = must be included |
| 92 | // source: a source ending in "/" means "this or any source starting with this", |
| 93 | // i;e., to enable source hierarchy |
| 94 | // + sorted |
| 95 | public List<MetaData> filter(List<String> sources, List<String> authors, List<String> tags) { |
| 96 | if (sources != null && sources.isEmpty()) |
| 97 | sources = null; |
| 98 | if (authors != null && authors.isEmpty()) |
| 99 | authors = null; |
| 100 | if (tags != null && tags.isEmpty()) |
| 101 | tags = null; |
| 102 | |
| 103 | // Quick check |
| 104 | if (sources == null && authors == null && tags == null) { |
| 105 | return metas; |
| 106 | } |
| 107 | |
| 108 | // allow "sources/" hierarchy |
| 109 | if (sources != null) { |
| 110 | List<String> folders = new ArrayList<String>(); |
| 111 | List<String> leaves = new ArrayList<String>(); |
| 112 | for (String source : sources) { |
| 113 | if (source.endsWith("/")) { |
| 114 | if (!folders.contains(source)) |
| 115 | folders.add(source); |
| 116 | } else { |
| 117 | if (!leaves.contains(source)) |
| 118 | leaves.add(source); |
| 119 | } |
| 120 | } |
| 121 | |
| 122 | sources = leaves; |
| 123 | for (String folder : folders) { |
| 124 | for (String otherLeaf : getSources(folder)) { |
| 125 | if (!sources.contains(otherLeaf)) { |
| 126 | sources.add(otherLeaf); |
| 127 | } |
| 128 | } |
| 129 | } |
| 130 | } |
| 131 | |
| 132 | List<MetaData> result = new ArrayList<MetaData>(); |
| 133 | for (MetaData meta : metas) { |
| 134 | if (sources != null && !sources.contains(meta.getSource())) { |
| 135 | continue; |
| 136 | } |
| 137 | if (authors != null && !authors.contains(meta.getAuthor())) { |
| 138 | continue; |
| 139 | } |
| 140 | |
| 141 | if (tags != null) { |
| 142 | boolean keep = false; |
| 143 | for (String thisTag : meta.getTags()) { |
| 144 | if (tags.contains(thisTag)) |
| 145 | keep = true; |
| 146 | } |
| 147 | |
| 148 | if (!keep) |
| 149 | continue; |
| 150 | } |
| 151 | |
| 152 | result.add(meta); |
| 153 | } |
| 154 | |
| 155 | Collections.sort(result); |
| 156 | return result; |
| 157 | } |
| 158 | } |