1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.tools;
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3 |
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4 | import java.util.ArrayList;
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5 | import java.util.Collections;
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6 | import java.util.EnumSet;
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7 | import java.util.List;
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8 | import java.util.Locale;
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9 | import java.util.Optional;
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10 | import java.util.Set;
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11 | import java.util.regex.Matcher;
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12 | import java.util.regex.Pattern;
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13 | import java.util.stream.Collectors;
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14 |
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15 | import org.openstreetmap.josm.data.osm.OsmPrimitiveType;
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16 | import org.openstreetmap.josm.data.osm.search.SearchCompiler;
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17 | import org.openstreetmap.josm.data.osm.search.SearchCompiler.Match;
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18 | import org.openstreetmap.josm.data.osm.search.SearchParseError;
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19 |
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20 | /**
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21 | * Builds an Overpass QL from a {@link org.openstreetmap.josm.actions.search.SearchAction} query.
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22 | *
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23 | * @since 8744 (using tyrasd/overpass-wizard), 16262 (standalone)
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24 | */
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25 | public final class OverpassTurboQueryWizard {
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26 |
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27 | private static final OverpassTurboQueryWizard instance = new OverpassTurboQueryWizard();
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28 |
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29 | /**
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30 | * Replies the unique instance of this class.
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31 | *
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32 | * @return the unique instance of this class
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33 | */
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34 | public static OverpassTurboQueryWizard getInstance() {
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35 | return instance;
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36 | }
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37 |
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38 | private OverpassTurboQueryWizard() {
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39 | // private constructor for utility class
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40 | }
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41 |
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42 | /**
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43 | * Builds an Overpass QL from a {@link org.openstreetmap.josm.actions.search.SearchAction} like query.
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44 | * @param search the {@link org.openstreetmap.josm.actions.search.SearchAction} like query
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45 | * @return an Overpass QL query
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46 | * @throws UncheckedParseException when the parsing fails
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47 | */
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48 | public String constructQuery(final String search) {
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49 | try {
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50 | Matcher matcher = Pattern.compile("\\s+GLOBAL\\s*$", Pattern.CASE_INSENSITIVE).matcher(search);
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51 | if (matcher.find()) {
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52 | final Match match = SearchCompiler.compile(matcher.replaceFirst(""));
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53 | return constructQuery(match, ";", "");
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54 | }
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55 |
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56 | matcher = Pattern.compile("\\s+IN BBOX\\s*$", Pattern.CASE_INSENSITIVE).matcher(search);
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57 | if (matcher.find()) {
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58 | final Match match = SearchCompiler.compile(matcher.replaceFirst(""));
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59 | return constructQuery(match, "[bbox:{{bbox}}];", "");
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60 | }
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61 |
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62 | matcher = Pattern.compile("\\s+(?<mode>IN|AROUND)\\s+(?<area>[^\" ]+|\"[^\"]+\")\\s*$", Pattern.CASE_INSENSITIVE).matcher(search);
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63 | if (matcher.find()) {
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64 | final Match match = SearchCompiler.compile(matcher.replaceFirst(""));
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65 | final String mode = matcher.group("mode").toUpperCase(Locale.ENGLISH);
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66 | final String area = Utils.strip(matcher.group("area"), "\"");
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67 | if ("IN".equals(mode)) {
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68 | return constructQuery(match, ";\n{{geocodeArea:" + area + "}}->.searchArea;", "(area.searchArea)");
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69 | } else if ("AROUND".equals(mode)) {
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70 | return constructQuery(match, ";\n{{radius=1000}}", "(around:{{radius}},{{geocodeCoords:" + area + "}})");
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71 | } else {
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72 | throw new IllegalStateException(mode);
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73 | }
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74 | }
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75 |
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76 | final Match match = SearchCompiler.compile(search);
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77 | return constructQuery(match, "[bbox:{{bbox}}];", "");
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78 | } catch (SearchParseError | UnsupportedOperationException e) {
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79 | throw new UncheckedParseException(e);
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80 | }
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81 | }
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82 |
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83 | private String constructQuery(final Match match, final String bounds, final String queryLineSuffix) {
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84 | final List<Match> normalized = normalizeToDNF(match);
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85 | final List<String> queryLines = new ArrayList<>();
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86 | queryLines.add("[out:xml][timeout:90]" + bounds);
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87 | queryLines.add("(");
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88 | for (Match conjunction : normalized) {
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89 | final EnumSet<OsmPrimitiveType> types = EnumSet.noneOf(OsmPrimitiveType.class);
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90 | final String query = constructQuery(conjunction, types);
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91 | for (Object type : types.isEmpty() || types.size() == 3 ? Collections.singleton("nwr") : types) {
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92 | queryLines.add(" " + type + query + queryLineSuffix + ";");
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93 | }
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94 | }
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95 | queryLines.add(");");
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96 | queryLines.add("(._;>;);");
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97 | queryLines.add("out meta;");
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98 | return String.join("\n", queryLines);
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99 | }
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100 |
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101 | private static String constructQuery(Match match, final Set<OsmPrimitiveType> types) {
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102 | final boolean negated;
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103 | if (match instanceof SearchCompiler.Not) {
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104 | negated = true;
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105 | match = ((SearchCompiler.Not) match).getMatch();
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106 | } else {
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107 | negated = false;
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108 | }
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109 | if (match instanceof SearchCompiler.And) {
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110 | return ((SearchCompiler.And) match).map(m -> constructQuery(m, types), (s1, s2) -> s1 + s2);
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111 | } else if (match instanceof SearchCompiler.KeyValue) {
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112 | final String key = ((SearchCompiler.KeyValue) match).getKey();
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113 | final String value = ((SearchCompiler.KeyValue) match).getValue();
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114 | return "[~" + quote(key) + "~" + quote(value) + "]";
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115 | } else if (match instanceof SearchCompiler.ExactKeyValue) {
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116 | // https://wiki.openstreetmap.org/wiki/Overpass_API/Language_Guide
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117 | // ["key"] -- filter objects tagged with this key and any value
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118 | // [!"key"] -- filter objects not tagged with this key and any value
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119 | // ["key"="value"] -- filter objects tagged with this key and this value
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120 | // ["key"!="value"] -- filter objects tagged with this key but not this value, or not tagged with this key
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121 | // ["key"~"value"] -- filter objects tagged with this key and a value matching a regular expression
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122 | // ["key"!~"value"] -- filter objects tagged with this key but a value not matching a regular expression
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123 | // [~"key"~"value"] -- filter objects tagged with a key and a value matching regular expressions
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124 | // [~"key"~"value", i] -- filter objects tagged with a key and a case-insensitive value matching regular expressions
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125 | final String key = ((SearchCompiler.ExactKeyValue) match).getKey();
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126 | final String value = ((SearchCompiler.ExactKeyValue) match).getValue();
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127 | final SearchCompiler.ExactKeyValue.Mode mode = ((SearchCompiler.ExactKeyValue) match).getMode();
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128 | switch (mode) {
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129 | case ANY_VALUE:
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130 | return "[" + (negated ? "!" : "") + quote(key) + "]";
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131 | case EXACT:
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132 | return "[" + quote(key) + (negated ? "!=" : "=") + quote(value) + "]";
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133 | case EXACT_REGEXP:
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134 | final Matcher matcher = Pattern.compile("/(?<regex>.*)/(?<flags>i)?").matcher(value);
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135 | final String valueQuery = matcher.matches()
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136 | ? quote(matcher.group("regex")) + Optional.ofNullable(matcher.group("flags")).map(f -> "," + f).orElse("")
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137 | : quote(value);
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138 | return "[" + quote(key) + (negated ? "!~" : "~") + valueQuery + "]";
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139 | case MISSING_KEY:
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140 | // special case for empty values, see https://github.com/drolbr/Overpass-API/issues/53
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141 | return "[" + quote(key) + (negated ? "!~" : "~") + quote("^$") + "]";
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142 | default:
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143 | return "";
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144 | }
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145 | } else if (match instanceof SearchCompiler.BooleanMatch) {
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146 | final String key = ((SearchCompiler.BooleanMatch) match).getKey();
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147 | return negated
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148 | ? "[" + quote(key) + "~\"false|no|0|off\"]"
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149 | : "[" + quote(key) + "~\"true|yes|1|on\"]";
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150 | } else if (match instanceof SearchCompiler.UserMatch) {
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151 | final String user = ((SearchCompiler.UserMatch) match).getUser();
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152 | return user.matches("\\d+")
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153 | ? "(uid:" + user + ")"
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154 | : "(user:" + quote(user) + ")";
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155 | } else if (match instanceof SearchCompiler.ExactType) {
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156 | types.add(((SearchCompiler.ExactType) match).getType());
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157 | return "";
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158 | }
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159 | Logging.warn("Unsupported match type {0}: {1}", match.getClass(), match);
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160 | return "/*" + match + "*/";
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161 | }
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162 |
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163 | /**
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164 | * Quotes the given string for its use in Overpass QL
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165 | */
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166 | private static String quote(final String s) {
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167 | return "\"" + s.replace("\\", "\\\\").replace("\"", "\\\"") + "\"";
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168 | }
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169 |
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170 | /**
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171 | * Normalizes the match to disjunctive normal form: A∧(B∨C) ⇔ (A∧B)∨(A∧C)
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172 | */
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173 | private static List<Match> normalizeToDNF(final Match match) {
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174 | if (match instanceof SearchCompiler.And) {
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175 | return ((SearchCompiler.And) match).map(OverpassTurboQueryWizard::normalizeToDNF, (lhs, rhs) -> lhs.stream()
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176 | .flatMap(l -> rhs.stream().map(r -> new SearchCompiler.And(l, r)))
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177 | .collect(Collectors.toList()));
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178 | } else if (match instanceof SearchCompiler.Or) {
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179 | return ((SearchCompiler.Or) match).map(OverpassTurboQueryWizard::normalizeToDNF, CompositeList::new);
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180 | } else if (match instanceof SearchCompiler.Xor) {
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181 | throw new UnsupportedOperationException(match.toString());
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182 | } else if (match instanceof SearchCompiler.Not) {
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183 | // only support negated KeyValue or ExactKeyValue matches
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184 | final Match innerMatch = ((SearchCompiler.Not) match).getMatch();
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185 | if (innerMatch instanceof SearchCompiler.BooleanMatch
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186 | || innerMatch instanceof SearchCompiler.KeyValue
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187 | || innerMatch instanceof SearchCompiler.ExactKeyValue) {
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188 | return Collections.singletonList(match);
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189 | }
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190 | throw new UnsupportedOperationException(match.toString());
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191 | } else {
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192 | return Collections.singletonList(match);
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193 | }
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194 | }
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195 |
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196 | }
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