1 | /** |
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2 | * Implements the "annotations" uri of the Annotator API. see |
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3 | * <https://github.com/okfn/annotator/wiki/Storage> |
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4 | */ |
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5 | package de.mpiwg.itgroup.annotations.restlet; |
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6 | |
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7 | import java.io.IOException; |
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8 | import java.util.ArrayList; |
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9 | import java.util.List; |
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10 | |
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11 | import org.json.JSONArray; |
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12 | import org.json.JSONException; |
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13 | import org.json.JSONObject; |
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14 | import org.restlet.data.Form; |
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15 | import org.restlet.data.Parameter; |
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16 | import org.restlet.data.Status; |
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17 | import org.restlet.ext.json.JsonRepresentation; |
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18 | import org.restlet.representation.Representation; |
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19 | import org.restlet.resource.Delete; |
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20 | import org.restlet.resource.Get; |
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21 | import org.restlet.resource.Post; |
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22 | import org.restlet.resource.Put; |
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23 | |
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24 | import de.mpiwg.itgroup.annotations.Annotation; |
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25 | import de.mpiwg.itgroup.annotations.Person; |
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26 | import de.mpiwg.itgroup.annotations.neo4j.AnnotationStore; |
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27 | import de.mpiwg.itgroup.annotations.restlet.utils.JSONObjectComparator; |
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28 | |
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29 | /** |
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30 | * Implements the "annotations" uri of the Annotator API. see |
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31 | * <https://github.com/okfn/annotator/wiki/Storage> |
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32 | * |
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33 | * @author dwinter, casties |
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34 | * |
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35 | */ |
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36 | public class AnnotatorAnnotations extends AnnotatorResourceImpl { |
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37 | |
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38 | protected String getAllowedMethodsForHeader() { |
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39 | return "OPTIONS,GET,POST,PUT,DELETE"; |
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40 | } |
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41 | |
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42 | /** |
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43 | * GET with JSON content-type. |
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44 | * |
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45 | * @param entity |
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46 | * @return |
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47 | */ |
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48 | @Get("json") |
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49 | public Representation doGetJSON(Representation entity) { |
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50 | logger.debug("AnnotatorAnnotations doGetJSON!"); |
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51 | setCorsHeaders(); |
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52 | // id from URI /annotations/{id} |
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53 | String jsonId = (String) getRequest().getAttributes().get("id"); |
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54 | String id = decodeJsonId(jsonId); |
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55 | logger.debug("annotation-id=" + id); |
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56 | |
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57 | |
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58 | // do authentication |
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59 | Person authUser = Person.createPersonWithId(this.checkAuthToken(entity)); |
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60 | logger.debug("request authenticated=" + authUser); |
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61 | |
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62 | if (id == null) { |
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63 | |
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64 | return getAllAnnotations(authUser); |
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65 | } |
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66 | |
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67 | |
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68 | AnnotationStore store = getAnnotationStore(); |
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69 | Annotation annot = store.getAnnotationById(id); |
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70 | if (annot != null) { |
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71 | if (! annot.isActionAllowed("read", authUser, store)) { |
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72 | setStatus(Status.CLIENT_ERROR_FORBIDDEN, "Not Authorized!"); |
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73 | return null; |
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74 | } |
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75 | JSONObject result = createAnnotatorJson(annot, (authUser == null)); |
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76 | logger.debug("sending:"); |
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77 | logger.debug(result); |
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78 | return new JsonRepresentation(result); |
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79 | } else { |
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80 | // not found |
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81 | setStatus(Status.CLIENT_ERROR_NOT_FOUND); |
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82 | return null; |
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83 | } |
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84 | } |
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85 | |
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86 | private Representation getAllAnnotations(Person authUser) { |
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87 | |
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88 | Form form = getRequest().getResourceRef().getQueryAsForm(); |
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89 | String sortBy=null; |
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90 | for (Parameter parameter : form) { |
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91 | if (parameter.getName().equals("sortBy")){ |
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92 | sortBy = parameter.getValue(); |
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93 | } |
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94 | } |
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95 | |
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96 | AnnotationStore store = getAnnotationStore(); |
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97 | ArrayList<JSONObject> results = new ArrayList<JSONObject>(); |
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98 | |
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99 | List<Annotation> annotations = store.getAnnotations(null, null); |
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100 | for (Annotation annotation : annotations) { |
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101 | //check permission |
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102 | if (!annotation.isActionAllowed("read", authUser, store)) continue; |
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103 | |
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104 | JSONObject jo = createAnnotatorJson(annotation,false); |
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105 | results.add(jo); |
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106 | |
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107 | } |
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108 | |
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109 | if (sortBy!=null){ |
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110 | JSONObjectComparator.sortAnnotations(results,sortBy); |
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111 | } |
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112 | |
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113 | JSONArray resultsJa = new JSONArray(); |
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114 | for (JSONObject result:results){ |
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115 | resultsJa.put(result); |
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116 | } |
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117 | |
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118 | // assemble result object |
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119 | JSONObject result = new JSONObject(); |
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120 | try { |
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121 | result.put("rows", resultsJa); |
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122 | result.put("total", resultsJa.length()); |
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123 | } catch (JSONException e) { |
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124 | setStatus(Status.SERVER_ERROR_INTERNAL, "JSON Error"); |
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125 | return null; |
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126 | } |
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127 | logger.debug("sending:"); |
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128 | logger.debug(result); |
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129 | return new JsonRepresentation(result); |
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130 | } |
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131 | |
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132 | |
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133 | |
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134 | |
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135 | |
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136 | /** |
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137 | * POST with JSON content-type. Creates a new Annotation. |
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138 | * |
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139 | * @return |
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140 | */ |
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141 | @Post("json") |
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142 | public Representation doPostJson(Representation entity) { |
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143 | logger.debug("AnnotatorAnnotations doPostJSON!"); |
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144 | // set headers |
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145 | setCorsHeaders(); |
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146 | |
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147 | // do authentication TODO: who's allowed to create? |
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148 | Person authUser = Person.createPersonWithId(this.checkAuthToken(entity)); |
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149 | logger.debug("request authenticated=" + authUser); |
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150 | if (authUser == null) { |
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151 | setStatus(Status.CLIENT_ERROR_FORBIDDEN, "Not Authorized!"); |
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152 | return null; |
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153 | } |
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154 | |
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155 | Annotation annot = null; |
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156 | try { |
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157 | JsonRepresentation jrep = new JsonRepresentation(entity); |
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158 | JSONObject jo = jrep.getJsonObject(); |
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159 | if (jo == null) { |
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160 | setStatus(Status.SERVER_ERROR_INTERNAL); |
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161 | return null; |
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162 | } |
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163 | // make sure id is not set for POST |
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164 | jo.remove("id"); |
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165 | // get Annotation object from posted JSON |
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166 | annot = createAnnotation(jo, entity); |
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167 | } catch (IOException e1) { |
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168 | setStatus(Status.SERVER_ERROR_INTERNAL); |
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169 | return null; |
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170 | } catch (JSONException e) { |
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171 | setStatus(Status.CLIENT_ERROR_BAD_REQUEST); |
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172 | return null; |
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173 | } |
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174 | if (annot == null) { |
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175 | setStatus(Status.CLIENT_ERROR_BAD_REQUEST); |
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176 | return null; |
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177 | } |
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178 | Annotation storedAnnot; |
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179 | // store Annotation |
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180 | storedAnnot = getAnnotationStore().storeAnnotation(annot); |
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181 | /* |
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182 | * according to https://github.com/okfn/annotator/wiki/Storage we should |
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183 | * return 303: see other. For now we return the annotation. |
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184 | */ |
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185 | JSONObject jo = createAnnotatorJson(storedAnnot, (authUser == null)); |
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186 | JsonRepresentation retRep = new JsonRepresentation(jo); |
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187 | return retRep; |
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188 | } |
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189 | |
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190 | /** |
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191 | * PUT with JSON content-type. Modifies an Annotation. |
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192 | * |
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193 | * @param entity |
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194 | * @return |
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195 | */ |
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196 | @Put("json") |
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197 | public Representation doPutJSON(Representation entity) { |
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198 | logger.debug("AnnotatorAnnotations doPutJSON!"); |
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199 | setCorsHeaders(); |
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200 | // id from URI /annotations/{id} |
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201 | String jsonId = (String) getRequest().getAttributes().get("id"); |
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202 | String id = decodeJsonId(jsonId); |
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203 | logger.debug("annotation-id=" + id); |
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204 | |
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205 | // do authentication |
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206 | Person authUser = Person.createPersonWithId(this.checkAuthToken(entity)); |
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207 | logger.debug("request authenticated=" + authUser); |
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208 | |
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209 | Annotation annot = null; |
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210 | AnnotationStore store = getAnnotationStore(); |
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211 | try { |
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212 | JsonRepresentation jrep = new JsonRepresentation(entity); |
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213 | JSONObject jo = jrep.getJsonObject(); |
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214 | if (jo == null) { |
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215 | setStatus(Status.CLIENT_ERROR_BAD_REQUEST); |
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216 | return null; |
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217 | } |
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218 | // get stored Annotation |
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219 | Annotation storedAnnot = store.getAnnotationById(id); |
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220 | if (storedAnnot == null) { |
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221 | setStatus(Status.CLIENT_ERROR_NOT_FOUND); |
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222 | return null; |
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223 | } |
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224 | if (! storedAnnot.isActionAllowed("update", authUser, store)) { |
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225 | setStatus(Status.CLIENT_ERROR_FORBIDDEN); |
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226 | return null; |
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227 | } |
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228 | // update from posted JSON |
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229 | annot = updateAnnotation(storedAnnot, jo, entity); |
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230 | // store Annotation |
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231 | storedAnnot = store.storeAnnotation(annot); |
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232 | /* |
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233 | * according to https://github.com/okfn/annotator/wiki/Storage we |
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234 | * should return 303: see other. but the client doesn't like it |
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235 | * setStatus(Status.REDIRECTION_SEE_OTHER); // go to same URL as |
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236 | * this one Reference thisUrl = this.getReference(); |
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237 | * this.getResponse().setLocationRef(thisUrl); |
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238 | */ |
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239 | // return new annotation |
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240 | jo = createAnnotatorJson(storedAnnot, (authUser == null)); |
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241 | JsonRepresentation retRep = new JsonRepresentation(jo); |
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242 | return retRep; |
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243 | } catch (JSONException e) { |
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244 | e.printStackTrace(); |
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245 | setStatus(Status.CLIENT_ERROR_BAD_REQUEST); |
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246 | } catch (IOException e) { |
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247 | e.printStackTrace(); |
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248 | setStatus(Status.SERVER_ERROR_INTERNAL, "Other Error"); |
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249 | } |
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250 | return null; |
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251 | } |
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252 | |
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253 | /** |
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254 | * DELETE with JSON content-type. Deletes an Annotation. |
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255 | * |
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256 | * @param entity |
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257 | * @return |
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258 | */ |
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259 | @Delete("json") |
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260 | public Representation doDeleteJSON(Representation entity) { |
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261 | logger.debug("AnnotatorAnnotations doDeleteJSON!"); |
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262 | setCorsHeaders(); |
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263 | // id from URI /annotations/{id} |
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264 | String jsonId = (String) getRequest().getAttributes().get("id"); |
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265 | String id = decodeJsonId(jsonId); |
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266 | logger.debug("annotation-id=" + id); |
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267 | |
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268 | // do authentication |
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269 | Person authUser = Person.createPersonWithId(this.checkAuthToken(entity)); |
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270 | logger.debug("request authenticated=" + authUser); |
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271 | AnnotationStore store = getAnnotationStore(); |
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272 | Annotation annot = store.getAnnotationById(id); |
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273 | if (annot != null) { |
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274 | if (! annot.isActionAllowed("delete", authUser, store)) { |
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275 | setStatus(Status.CLIENT_ERROR_FORBIDDEN, "Not Authorized!"); |
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276 | return null; |
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277 | } |
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278 | } |
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279 | |
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280 | // delete annotation |
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281 | store.deleteAnnotationById(id); |
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282 | setStatus(Status.SUCCESS_NO_CONTENT); |
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283 | return null; |
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284 | } |
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285 | |
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286 | } |
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