Source code

001// ***************************************************************************************************************************
002// * Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.  See the NOTICE file *
003// * distributed with this work for additional information regarding copyright ownership.  The ASF licenses this file        *
004// * to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance            *
005// * with the License.  You may obtain a copy of the License at                                                              *
006// *                                                                                                                         *
007// *  http://www.apache.org/licenses/LICENSE-2.0                                                                             *
008// *                                                                                                                         *
009// * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an  *
010// * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the License for the        *
011// * specific language governing permissions and limitations under the License.                                              *
012// ***************************************************************************************************************************
013package org.apache.juneau.dto.swagger.ui;
014
015import static org.apache.juneau.dto.html5.HtmlBuilder.*;
016
017import java.util.*;
018import java.util.Map;
019
020import org.apache.juneau.*;
021import org.apache.juneau.dto.html5.*;
022import org.apache.juneau.dto.swagger.*;
023import org.apache.juneau.http.*;
024import org.apache.juneau.internal.*;
025import org.apache.juneau.transform.*;
026import org.apache.juneau.utils.*;
027
028/**
029 * Generates a Swagger-UI interface from a Swagger document.
030 */
031public class SwaggerUI extends PojoSwap<Swagger,Div> {
032
033   //-------------------------------------------------------------------------------------------------------------------
034   // Configurable properties
035   //-------------------------------------------------------------------------------------------------------------------
036
037   private static final String PREFIX = "SwaggerUI.";
038
039   /**
040    * Configuration property:  Resolve <code>$ref</code> references in schema up to the specified depth.
041    *
042    * <h5 class='section'>Property:</h5>
043    * <ul>
044    *    <li><b>Name:</b>  <js>"SwaggerUI.resolveRefsMaxDepth.i"</js>
045    *    <li><b>Data type:</b>  <code>Integer</code>
046    *    <li><b>Default:</b>  <code>1</code>
047    *    <li><b>Session property:</b>  <jk>true</jk>
048    * </ul>
049    *
050    * <h5 class='section'>Description:</h5>
051    * <p>
052    * Defines the maximum recursive depth to resolve <code>$ref</code> variables in schema infos.
053    * <br>The default <code>1</code> means only resolve the first reference encountered.
054    * <br>A value of <code>0</code> disables reference resolution altogether.
055    *
056    * <h5 class='section'>Example:</h5>
057    * <p class='bcode w800'>
058    *    <jc>// Resolve schema references up to 5 levels deep.
059    *    <ja>@RestResource</ja>(
060    *          properties={
061    *             <ja>@Property</ja>(name=<jsf>SWAGGERUI_resolveRefsMaxDepth</jsf>, value=<js>"5"</js>)
062    *          }
063    *    <jk>public class</jk> MyResource {...}
064    * </p>
065    */
066   public static final String SWAGGERUI_resolveRefsMaxDepth = PREFIX + "resolveRefsMaxDepth.i";
067
068
069   static final ClasspathResourceManager RESOURCES = new ClasspathResourceManager(SwaggerUI.class, ClasspathResourceFinderBasic.INSTANCE, Boolean.getBoolean("RestContext.useClasspathResourceCaching.b"));
070
071   private static final Set<String> STANDARD_METHODS = new ASet<String>().appendAll("get", "put", "post", "delete", "options");
072
073   /**
074    * This UI applies to HTML requests only.
075    */
076   @Override
077   public MediaType[] forMediaTypes() {
078      return new MediaType[] {MediaType.HTML};
079   }
080
081   private static final class Session {
082      final int resolveRefsMaxDepth;
083      final Swagger swagger;
084
085      Session(BeanSession bs, Swagger swagger) {
086         this.swagger = swagger.copy();
087         this.resolveRefsMaxDepth = bs.getProperty(SWAGGERUI_resolveRefsMaxDepth, Integer.class, 1);
088      }
089   }
090
091   @Override
092   public Div swap(BeanSession beanSession, Swagger swagger) throws Exception {
093
094      Session s = new Session(beanSession, swagger);
095
096      String css = RESOURCES.getString("files/htdocs/styles/SwaggerUI.css");
097      if (css == null)
098         css = RESOURCES.getString("SwaggerUI.css");
099
100      Div outer = div(
101         style(css),
102         script("text/javascript", RESOURCES.getString("SwaggerUI.js")),
103         header(s)
104      )._class("swagger-ui");
105
106      // Operations without tags are rendered first.
107      outer.child(div()._class("tag-block tag-block-open").children(tagBlockContents(s, null)));
108
109      if (s.swagger.hasTags()) {
110         for (Tag t : s.swagger.getTags()) {
111            Div tagBlock = div()._class("tag-block tag-block-open").children(
112               tagBlockSummary(t),
113               tagBlockContents(s, t)
114            );
115            outer.child(tagBlock);
116         }
117      }
118
119      if (s.swagger.hasDefinitions()) {
120         Div modelBlock = div()._class("tag-block").children(
121            modelsBlockSummary(),
122            modelsBlockContents(s)
123         );
124         outer.child(modelBlock);
125      }
126
127      return outer;
128   }
129
130   // Creates the informational summary before the ops.
131   private Table header(Session s) {
132      Table table = table()._class("header");
133
134      Info info = s.swagger.getInfo();
135      if (info != null) {
136
137         if (info.hasDescription())
138            table.child(tr(th("Description:"),td(toBRL(info.getDescription()))));
139
140         if (info.hasVersion())
141            table.child(tr(th("Version:"),td(info.getVersion())));
142
143         Contact c = info.getContact();
144         if (c != null) {
145            Table t2 = table();
146
147            if (c.hasName())
148               t2.child(tr(th("Name:"),td(c.getName())));
149            if (c.hasUrl())
150               t2.child(tr(th("URL:"),td(a(c.getUrl(), c.getUrl()))));
151            if (c.hasEmail())
152               t2.child(tr(th("Email:"),td(a("mailto:"+ c.getEmail(), c.getEmail()))));
153
154            table.child(tr(th("Contact:"),td(t2)));
155         }
156
157         License l = info.getLicense();
158         if (l != null) {
159            Object child = l.hasUrl() ? a(l.getUrl(), l.hasName() ? l.getName() : l.getUrl()) : l.getName();
160            table.child(tr(th("License:"),td(child)));
161         }
162
163         ExternalDocumentation ed = s.swagger.getExternalDocs();
164         if (ed != null) {
165            Object child = ed.hasUrl() ? a(ed.getUrl(), ed.hasDescription() ? ed.getDescription() : ed.getUrl()) : ed.getDescription();
166            table.child(tr(th("Docs:"),td(child)));
167         }
168
169         if (info.hasTermsOfService()) {
170            String tos = info.getTermsOfService();
171            Object child = StringUtils.isUri(tos) ? a(tos, tos) : tos;
172            table.child(tr(th("Terms of Service:"),td(child)));
173         }
174      }
175
176      return table;
177   }
178
179   // Creates the "pet  Everything about your Pets  ext-link" header.
180   private HtmlElement tagBlockSummary(Tag t) {
181      ExternalDocumentation ed = t.getExternalDocs();
182
183      return div()._class("tag-block-summary").children(
184         span(t.getName())._class("name"),
185         span(toBRL(t.getDescription()))._class("description"),
186         ed == null ? null : span(a(ed.getUrl(), ed.hasDescription() ? ed.getDescription() : ed.getUrl()))._class("extdocs")
187      ).onclick("toggleTagBlock(this)");
188   }
189
190   // Creates the contents under the "pet  Everything about your Pets  ext-link" header.
191   private Div tagBlockContents(Session s, Tag t) {
192      Div tagBlockContents = div()._class("tag-block-contents");
193
194      for (Map.Entry<String,OperationMap> e : s.swagger.getPaths().entrySet()) {
195         String path = e.getKey();
196         for (Map.Entry<String,Operation> e2 : e.getValue().entrySet()) {
197            String opName = e2.getKey();
198            Operation op = e2.getValue();
199            if ((t == null && op.hasNoTags()) || (t != null && op.hasTag(t.getName())))
200               tagBlockContents.child(opBlock(s, path, opName, op));
201         }
202      }
203
204      return tagBlockContents;
205   }
206
207   private Div opBlock(Session s, String path, String opName, Operation op) {
208
209      String opClass = op.isDeprecated() ? "deprecated" : opName.toLowerCase();
210      if (! op.isDeprecated() && ! STANDARD_METHODS.contains(opClass))
211         opClass = "other";
212
213      return div()._class("op-block op-block-closed " + opClass).children(
214         opBlockSummary(path, opName, op),
215         div(tableContainer(s, op))._class("op-block-contents")
216      );
217   }
218
219   private HtmlElement opBlockSummary(String path, String opName, Operation op) {
220      return div()._class("op-block-summary").children(
221         span(opName.toUpperCase())._class("method-button"),
222         span(path)._class("path"),
223         op.hasSummary() ? span(op.getSummary())._class("summary") : null
224      ).onclick("toggleOpBlock(this)");
225   }
226
227   private Div tableContainer(Session s, Operation op) {
228      Div tableContainer = div()._class("table-container");
229
230      if (op.hasDescription())
231         tableContainer.child(div(toBRL(op.getDescription()))._class("op-block-description"));
232
233      if (op.hasParameters()) {
234         tableContainer.child(div(h4("Parameters")._class("title"))._class("op-block-section-header"));
235
236         Table parameters = table(tr(th("Name")._class("parameter-key"), th("Description")._class("parameter-key")))._class("parameters");
237
238         for (ParameterInfo pi : op.getParameters()) {
239            String piName = "body".equals(pi.getIn()) ? "body" : pi.getName();
240            boolean required = pi.getRequired() == null ? false : pi.getRequired();
241
242            Td parameterKey = td(
243               div(piName)._class("name" + (required ? " required" : "")),
244               required ? div("required")._class("requiredlabel") : null,
245               div(pi.getType())._class("type"),
246               div('(' + pi.getIn() + ')')._class("in")
247            )._class("parameter-key");
248
249            Td parameterValue = td(
250               div(toBRL(pi.getDescription()))._class("description"),
251               examples(s, pi)
252            )._class("parameter-value");
253
254            parameters.child(tr(parameterKey, parameterValue));
255         }
256
257         tableContainer.child(parameters);
258      }
259
260      if (op.hasResponses()) {
261         tableContainer.child(div(h4("Responses")._class("title"))._class("op-block-section-header"));
262
263         Table responses = table(tr(th("Code")._class("response-key"), th("Description")._class("response-key")))._class("responses");
264         tableContainer.child(responses);
265
266         for (Map.Entry<String,ResponseInfo> e3 : op.getResponses().entrySet()) {
267            ResponseInfo ri = e3.getValue();
268
269            Td code = td(e3.getKey())._class("response-key");
270
271            Td codeValue = td(
272               div(toBRL(ri.getDescription()))._class("description"),
273               examples(s, ri),
274               headers(s, ri)
275            )._class("response-value");
276
277            responses.child(tr(code, codeValue));
278         }
279      }
280
281      return tableContainer;
282   }
283
284   private Div headers(Session s, ResponseInfo ri) {
285      if (! ri.hasHeaders())
286         return null;
287
288      Table sectionTable = table(tr(th("Name"),th("Description"),th("Schema")))._class("section-table");
289
290      Div headers = div(
291         div("Headers:")._class("section-name"),
292         sectionTable
293      )._class("headers");
294
295      for (Map.Entry<String,HeaderInfo> e : ri.getHeaders().entrySet()) {
296         String name = e.getKey();
297         HeaderInfo hi = e.getValue();
298         sectionTable.child(
299            tr(
300               td(name)._class("name"),
301               td(toBRL(hi.getDescription()))._class("description"),
302               td(hi.asMap().keepAll("type","format","items","collectionFormat","default","maximum","exclusiveMaximum","minimum","exclusiveMinimum","maxLength","minLength","pattern","maxItems","minItems","uniqueItems","enum","multipleOf"))
303            )
304         );
305      }
306
307      return headers;
308   }
309
310   private Div examples(Session s, ParameterInfo pi) {
311      boolean isBody = "body".equals(pi.getIn());
312
313      ObjectMap m = new ObjectMap();
314
315      try {
316         if (isBody) {
317            SchemaInfo si = pi.getSchema();
318            if (si != null)
319               m.put("model", si.copy().resolveRefs(s.swagger, new ArrayDeque<String>(), s.resolveRefsMaxDepth));
320         } else {
321            ObjectMap om = pi
322               .copy()
323               .resolveRefs(s.swagger, new ArrayDeque<String>(), s.resolveRefsMaxDepth)
324               .asMap()
325               .keepAll("format","pattern","collectionFormat","maximum","minimum","multipleOf","maxLength","minLength","maxItems","minItems","allowEmptyValue","exclusiveMaximum","exclusiveMinimum","uniqueItems","items","default","enum");
326            m.put("model", om.isEmpty() ? i("none") : om);
327         }
328
329         Map<String,?> examples = pi.getExamples();
330         if (examples != null)
331            for (Map.Entry<String,?> e : examples.entrySet())
332               m.put(e.getKey(), e.getValue());
333      } catch (Exception e) {
334         e.printStackTrace();
335      }
336
337      if (m.isEmpty())
338         return null;
339
340      return examplesDiv(m);
341   }
342
343   private Div examples(Session s, ResponseInfo ri) {
344      SchemaInfo si = ri.getSchema();
345
346      ObjectMap m = new ObjectMap();
347      try {
348         if (si != null) {
349            si = si.copy().resolveRefs(s.swagger, new ArrayDeque<String>(), s.resolveRefsMaxDepth);
350            m.put("model", si);
351         }
352
353         Map<String,?> examples = ri.getExamples();
354         if (examples != null)
355            for (Map.Entry<String,?> e : examples.entrySet())
356               m.put(e.getKey(), e.getValue());
357      } catch (Exception e) {
358         e.printStackTrace();
359      }
360
361      if (m.isEmpty())
362         return null;
363
364      return examplesDiv(m);
365   }
366
367   private Div examplesDiv(ObjectMap m) {
368      if (m.isEmpty())
369         return null;
370
371      Select select = null;
372      if (m.size() > 1) {
373         select = (Select)select().onchange("selectExample(this)")._class("example-select");
374      }
375
376      Div div = div(select)._class("examples");
377
378      if (select != null)
379         select.child(option("model","model"));
380      div.child(div(m.remove("model"))._class("model active").attr("data-name", "model"));
381
382      for (Map.Entry<String,Object> e : m.entrySet()) {
383         if (select != null)
384            select.child(option(e.getKey(), e.getKey()));
385         div.child(div(e.getValue().toString().replaceAll("\\n", "\n"))._class("example").attr("data-name", e.getKey()));
386      }
387
388      return div;
389   }
390
391   // Creates the "Model" header.
392   private HtmlElement modelsBlockSummary() {
393      return div()._class("tag-block-summary").children(span("Models")._class("name")).onclick("toggleTagBlock(this)");
394   }
395
396   // Creates the contents under the "Model" header.
397   private Div modelsBlockContents(Session s) {
398      Div modelBlockContents = div()._class("tag-block-contents");
399      for (Map.Entry<String,ObjectMap> e : s.swagger.getDefinitions().entrySet())
400         modelBlockContents.child(modelBlock(e.getKey(), e.getValue()));
401      return modelBlockContents;
402   }
403
404   private Div modelBlock(String modelName, ObjectMap model) {
405      return div()._class("op-block op-block-closed model").children(
406         modelBlockSummary(modelName, model),
407         div(model)._class("op-block-contents")
408      );
409   }
410
411   private HtmlElement modelBlockSummary(String modelName, ObjectMap model) {
412      return div()._class("op-block-summary").children(
413         span(modelName)._class("method-button"),
414         model.containsKey("description") ? span(toBRL(model.remove("description").toString()))._class("summary") : null
415      ).onclick("toggleOpBlock(this)");
416   }
417
418   /**
419    * Replaces newlines with <br> elements.
420    */
421   private static List<Object> toBRL(String s) {
422      if (s == null)
423         return null;
424      if (s.indexOf(',') == -1)
425         return Collections.<Object>singletonList(s);
426      List<Object> l = new ArrayList<>();
427      String[] sa = s.split("\n");
428      for (int i = 0; i < sa.length; i++) {
429         if (i > 0)
430            l.add(br());
431         l.add(sa[i]);
432      }
433      return l;
434   }
435}
436