/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.isis.viewer.scimpi.dispatcher.processor;
import java.util.Stack;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.isis.viewer.scimpi.dispatcher.BlockContent;
import org.apache.isis.viewer.scimpi.dispatcher.ElementProcessor;
import org.apache.isis.viewer.scimpi.dispatcher.ScimpiException;
import org.apache.isis.viewer.scimpi.dispatcher.action.Attributes;
import org.apache.isis.viewer.scimpi.dispatcher.context.RequestContext;
import org.apache.isis.viewer.scimpi.dispatcher.view.HtmlSnippet;
import org.apache.isis.viewer.scimpi.dispatcher.view.Snippet;
import org.apache.isis.viewer.scimpi.dispatcher.view.SwfTag;
public class Request implements PageWriter {
public class RepeatMarker {
private final int index;
private RepeatMarker(final int index) {
this.index = index;
}
public void repeat() {
Request.this.index = index;
}
}
private static Logger LOG = LoggerFactory.getLogger(Request.class);
public static final boolean ENSURE_VARIABLES_EXIST = true;
public static final boolean NO_VARIABLE_CHECKING = false;
private static Encoder encoder;
public static Encoder getEncoder() {
return encoder;
}
private final RequestContext context;
private final Stack<Snippet> snippets;
private final Stack<StringBuffer> buffers;
private final Stack<BlockContent> blocks;
private final ProcessorLookup processors;
private int nextFormId;
private int index = -1;
private final String path;
public Request(final String path, final RequestContext context, final Encoder encoder, final Stack<Snippet> snippets, final ProcessorLookup processors) {
this.path = path;
this.context = context;
Request.encoder = encoder;
this.snippets = snippets;
this.processors = processors;
buffers = new Stack<StringBuffer>();
blocks = new Stack<BlockContent>();
pushNewBuffer();
}
public void processNextTag() {
while (index < snippets.size() - 1) {
index++;
final Snippet snippet = snippets.get(index);
if (snippet instanceof HtmlSnippet) {
appendSnippet((HtmlSnippet) snippet);
} else {
final SwfTag tag = (SwfTag) snippet;
final String name = tag.getName();
final ElementProcessor processor = processors.getFor(name);
process(tag, processor);
if (context.isAborted()) {
return;
}
}
}
}
private void appendSnippet(final HtmlSnippet snippet) {
String html = snippet.getHtml();
try {
if (snippet.isContainsVariable()) {
html = context.replaceVariables(html);
}
appendHtml(html);
} catch (final TagProcessingException e) {
throw e;
} catch (final RuntimeException e) {
final String replace = "<";
final String withReplacement = "<";
html = html.replaceAll(replace, withReplacement);
throw new TagProcessingException("Error while processing html block at " + snippet.errorAt() + " - " + e.getMessage(), html, e);
}
}
@Override
public void appendAsHtmlEncoded(final String string) {
appendHtml(encodeHtml(string));
// appendHtml(string);
}
@Override
public void appendHtml(final String html) {
final StringBuffer buffer = buffers.peek();
buffer.append(html);
}
public void appendDebug(final String line) {
context.appendDebugTrace(encodeHtml(line));
}
private String encodeHtml(final String text) {
return encoder.encoder(text);
}
public void appendTruncated(String text, final int truncateTo) {
if (truncateTo > 0 && text.length() > truncateTo) {
text = text.substring(0, truncateTo) + "...";
}
appendAsHtmlEncoded(text);
}
private void process(final SwfTag tag, final ElementProcessor processor) {
try {
LOG.debug("processing " + processor.getName() + " " + tag);
appendDebug("\n" + tag.debug());
if (tag.getType() == SwfTag.END) {
throw new TagProcessingException(tag.errorAt() + " - end tag mistaken for a start tag", tag.toString());
}
processor.process(this);
} catch (final TagProcessingException e) {
throw e;
} catch (final RuntimeException e) {
throw new TagProcessingException("Error while processing " + tag.getName().toLowerCase() + " element at " + tag.errorAt() + " - " + e.getMessage(), tag.toString(), e);
}
}
public void processUtilCloseTag() {
final SwfTag tag = getTag();
if (tag.getType() == SwfTag.EMPTY) {
return;
}
while (index < snippets.size() - 1) {
index++;
final Snippet snippet = snippets.get(index);
if (snippet instanceof HtmlSnippet) {
appendSnippet((HtmlSnippet) snippet);
} else {
final SwfTag nextTag = (SwfTag) snippet;
if (tag.getName().equals(nextTag.getName())) {
if (nextTag.getType() == SwfTag.START) {
} else {
return;
}
}
final String name = nextTag.getName();
if (nextTag.getType() == SwfTag.END && !tag.getName().equals(name)) {
throw new TagProcessingException("Expected " + nextTag.getName().toLowerCase() + " tag but found " + tag.getName().toLowerCase() + " tag at " + nextTag.errorAt(), tag.toString());
}
final ElementProcessor processor = processors.getFor(name);
process(nextTag, processor);
}
}
}
public void skipUntilClose() {
final SwfTag tag = getTag();
if (tag.getType() == SwfTag.EMPTY) {
if (context.isDebug()) {
appendHtml("<!-- " + "skipped " + tag + " -->");
}
return;
}
int depth = 1;
while (index < snippets.size() - 1) {
index++;
final Snippet snippet = snippets.get(index);
if (snippet instanceof SwfTag) {
final SwfTag nextTag = (SwfTag) snippet;
if (tag.getName().equals(nextTag.getName())) {
if (nextTag.getType() == SwfTag.START) {
depth++;
} else {
depth--;
if (depth == 0) {
return;
}
}
}
}
}
}
public void closeEmpty() {
final SwfTag tag = getTag();
if (tag.getType() == SwfTag.EMPTY) {
return;
}
if (index < snippets.size()) {
final Snippet snippet = snippets.get(index);
if (snippet instanceof SwfTag) {
final SwfTag nextTag = (SwfTag) snippet;
if (nextTag.getType() == SwfTag.EMPTY) {
return;
}
}
}
throw new ScimpiException("Empty tag not closed");
}
public void pushNewBuffer() {
final StringBuffer buffer = new StringBuffer();
buffers.push(buffer);
}
public String popBuffer() {
final String content = buffers.pop().toString();
return content;
}
public SwfTag getTag() {
return (SwfTag) snippets.get(index);
}
public RequestContext getContext() {
return context;
}
// TODO rename to pushBlock()
public void setBlockContent(final BlockContent content) {
blocks.add(content);
}
public BlockContent popBlockContent() {
return blocks.pop();
}
public BlockContent getBlockContent() {
return blocks.peek();
}
public String getViewPath() {
return path;
}
public String nextFormId() {
return String.valueOf(nextFormId++);
}
public String getOptionalProperty(final String name, final String defaultValue) {
return getOptionalProperty(name, defaultValue, true);
}
public String getOptionalProperty(final String name, final String defaultValue, final boolean ensureVariablesExists) {
final Attributes attributes = getTag().getAttributes();
return attributes.getOptionalProperty(name, defaultValue, ensureVariablesExists);
}
public String getOptionalProperty(final String name) {
return getOptionalProperty(name, true);
}
public String getOptionalProperty(final String name, final boolean ensureVariablesExists) {
final Attributes attributes = getTag().getAttributes();
return attributes.getOptionalProperty(name, ensureVariablesExists);
}
public Attributes getAttributes() {
return getTag().getAttributes();
}
public String getRequiredProperty(final String name) {
return getRequiredProperty(name, true);
}
public String getRequiredProperty(final String name, final boolean ensureVariablesExists) {
final Attributes attributes = getTag().getAttributes();
return attributes.getRequiredProperty(name, ensureVariablesExists);
}
public boolean isRequested(final String name) {
final Attributes attributes = getTag().getAttributes();
return attributes.isRequested(name);
}
public boolean isRequested(final String name, final boolean defaultValue) {
final Attributes attributes = getTag().getAttributes();
return attributes.isRequested(name, defaultValue);
}
public boolean isPropertySet(final String name) {
final Attributes attributes = getTag().getAttributes();
return attributes.isPropertySet(name);
}
public boolean isPropertySpecified(final String name) {
final Attributes attributes = getTag().getAttributes();
return attributes.isPropertySpecified(name);
}
public RepeatMarker createMarker() {
return new RepeatMarker(index);
}
}