| 1 | package be.nikiroo.fanfix.library; |
| 2 | |
| 3 | import java.util.ArrayList; |
| 4 | import java.util.Arrays; |
| 5 | import java.util.Collections; |
| 6 | import java.util.Comparator; |
| 7 | import java.util.List; |
| 8 | |
| 9 | import be.nikiroo.fanfix.data.MetaData; |
| 10 | |
| 11 | public class MetaResultList { |
| 12 | private List<MetaData> metas; |
| 13 | |
| 14 | // Lazy lists: |
| 15 | // TODO: sync-protect them? |
| 16 | private List<String> sources; |
| 17 | private List<String> authors; |
| 18 | private List<String> tags; |
| 19 | |
| 20 | // can be null (will consider it empty) |
| 21 | public MetaResultList(List<MetaData> metas) { |
| 22 | if (metas == null) { |
| 23 | metas = new ArrayList<MetaData>(); |
| 24 | } |
| 25 | |
| 26 | Collections.sort(metas); |
| 27 | this.metas = metas; |
| 28 | } |
| 29 | |
| 30 | // not NULL |
| 31 | // sorted |
| 32 | public List<MetaData> getMetas() { |
| 33 | return metas; |
| 34 | } |
| 35 | |
| 36 | public List<String> getSources() { |
| 37 | if (sources == null) { |
| 38 | sources = new ArrayList<String>(); |
| 39 | for (MetaData meta : metas) { |
| 40 | if (!sources.contains(meta.getSource())) |
| 41 | sources.add(meta.getSource()); |
| 42 | } |
| 43 | sort(sources); |
| 44 | } |
| 45 | |
| 46 | return sources; |
| 47 | } |
| 48 | |
| 49 | // A -> (A), A/ -> (A, A/*) if we can find something for "*" |
| 50 | public List<String> getSources(String source) { |
| 51 | List<String> linked = new ArrayList<String>(); |
| 52 | if (source != null && !source.isEmpty()) { |
| 53 | if (!source.endsWith("/")) { |
| 54 | linked.add(source); |
| 55 | } else { |
| 56 | linked.add(source.substring(0, source.length() - 1)); |
| 57 | for (String src : getSources()) { |
| 58 | if (src.startsWith(source)) { |
| 59 | linked.add(src); |
| 60 | } |
| 61 | } |
| 62 | } |
| 63 | } |
| 64 | |
| 65 | sort(linked); |
| 66 | return linked; |
| 67 | } |
| 68 | |
| 69 | public List<String> getAuthors() { |
| 70 | if (authors == null) { |
| 71 | authors = new ArrayList<String>(); |
| 72 | for (MetaData meta : metas) { |
| 73 | if (!authors.contains(meta.getAuthor())) |
| 74 | authors.add(meta.getAuthor()); |
| 75 | } |
| 76 | sort(authors); |
| 77 | } |
| 78 | |
| 79 | return authors; |
| 80 | } |
| 81 | |
| 82 | public List<String> getTags() { |
| 83 | if (tags == null) { |
| 84 | tags = new ArrayList<String>(); |
| 85 | for (MetaData meta : metas) { |
| 86 | for (String tag : meta.getTags()) { |
| 87 | if (!tags.contains(tag)) |
| 88 | tags.add(tag); |
| 89 | } |
| 90 | } |
| 91 | sort(tags); |
| 92 | } |
| 93 | |
| 94 | return tags; |
| 95 | } |
| 96 | |
| 97 | // helper |
| 98 | public List<MetaData> filter(String source, String author, String tag) { |
| 99 | List<String> sources = source == null ? null : Arrays.asList(source); |
| 100 | List<String> authors = author == null ? null : Arrays.asList(author); |
| 101 | List<String> tags = tag == null ? null : Arrays.asList(tag); |
| 102 | |
| 103 | return filter(sources, authors, tags); |
| 104 | } |
| 105 | |
| 106 | // null or empty -> no check, rest = must be included |
| 107 | // source: a source ending in "/" means "this or any source starting with |
| 108 | // this", |
| 109 | // i;e., to enable source hierarchy |
| 110 | // + sorted |
| 111 | public List<MetaData> filter(List<String> sources, List<String> authors, |
| 112 | List<String> tags) { |
| 113 | if (sources != null && sources.isEmpty()) |
| 114 | sources = null; |
| 115 | if (authors != null && authors.isEmpty()) |
| 116 | authors = null; |
| 117 | if (tags != null && tags.isEmpty()) |
| 118 | tags = null; |
| 119 | |
| 120 | // Quick check |
| 121 | if (sources == null && authors == null && tags == null) { |
| 122 | return metas; |
| 123 | } |
| 124 | |
| 125 | // allow "sources/" hierarchy |
| 126 | if (sources != null) { |
| 127 | List<String> folders = new ArrayList<String>(); |
| 128 | List<String> leaves = new ArrayList<String>(); |
| 129 | for (String source : sources) { |
| 130 | if (source.endsWith("/")) { |
| 131 | if (!folders.contains(source)) |
| 132 | folders.add(source); |
| 133 | } else { |
| 134 | if (!leaves.contains(source)) |
| 135 | leaves.add(source); |
| 136 | } |
| 137 | } |
| 138 | |
| 139 | sources = leaves; |
| 140 | for (String folder : folders) { |
| 141 | for (String otherLeaf : getSources(folder)) { |
| 142 | if (!sources.contains(otherLeaf)) { |
| 143 | sources.add(otherLeaf); |
| 144 | } |
| 145 | } |
| 146 | } |
| 147 | } |
| 148 | |
| 149 | List<MetaData> result = new ArrayList<MetaData>(); |
| 150 | for (MetaData meta : metas) { |
| 151 | if (sources != null && !sources.contains(meta.getSource())) { |
| 152 | continue; |
| 153 | } |
| 154 | if (authors != null && !authors.contains(meta.getAuthor())) { |
| 155 | continue; |
| 156 | } |
| 157 | |
| 158 | if (tags != null) { |
| 159 | boolean keep = false; |
| 160 | for (String thisTag : meta.getTags()) { |
| 161 | if (tags.contains(thisTag)) |
| 162 | keep = true; |
| 163 | } |
| 164 | |
| 165 | if (!keep) |
| 166 | continue; |
| 167 | } |
| 168 | |
| 169 | result.add(meta); |
| 170 | } |
| 171 | |
| 172 | Collections.sort(result); |
| 173 | return result; |
| 174 | } |
| 175 | |
| 176 | /** |
| 177 | * Sort the given {@link String} values, ignoring case. |
| 178 | * |
| 179 | * @param values |
| 180 | * the values to sort |
| 181 | */ |
| 182 | private void sort(List<String> values) { |
| 183 | Collections.sort(values, new Comparator<String>() { |
| 184 | @Override |
| 185 | public int compare(String o1, String o2) { |
| 186 | return ("" + o1).compareToIgnoreCase("" + o2); |
| 187 | } |
| 188 | }); |
| 189 | } |
| 190 | } |