+++ /dev/null
-package org.cacert.gigi.output.template;
-
-import java.io.File;
-import java.io.FileInputStream;
-import java.io.IOException;
-import java.io.InputStreamReader;
-import java.io.PrintWriter;
-import java.io.Reader;
-import java.net.URISyntaxException;
-import java.net.URL;
-import java.text.SimpleDateFormat;
-import java.util.Arrays;
-import java.util.Collection;
-import java.util.Date;
-import java.util.LinkedList;
-import java.util.Map;
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
-
-import org.cacert.gigi.localisation.Language;
-import org.cacert.gigi.output.DateSelector;
-import org.cacert.gigi.util.DayDate;
-import org.cacert.gigi.util.EditDistance;
-import org.cacert.gigi.util.HTMLEncoder;
-
-/**
- * Represents a loaded template file.
- */
-public class Template implements Outputable {
-
- protected static class ParseResult {
-
- TemplateBlock block;
-
- String endType;
-
- public ParseResult(TemplateBlock block, String endType) {
- this.block = block;
- this.endType = endType;
- }
-
- public String getEndType() {
- return endType;
- }
-
- public TemplateBlock getBlock(String reqType) {
- if (endType == null && reqType == null) {
- return block;
- }
- if (endType == null || reqType == null) {
- throw new Error("Invalid block type: " + endType);
- }
- if (endType.equals(reqType)) {
- return block;
- }
- throw new Error("Invalid block type: " + endType);
- }
- }
-
- private TemplateBlock data;
-
- private long lastLoaded;
-
- private File source;
-
- private static final Pattern CONTROL_PATTERN = Pattern.compile(" ?([a-zA-Z]+)\\(\\$([^)]+)\\) ?\\{ ?");
-
- private static final Pattern ELSE_PATTERN = Pattern.compile(" ?\\} ?else ?\\{ ?");
-
- private static final String[] POSSIBLE_CONTROL_PATTERNS = new String[] {
- "if", "else", "foreach"
- };
-
- private static final String UNKOWN_CONTROL_STRUCTURE_MSG = "Unknown control structure \"%s\", did you mean \"%s\"?";
-
- /**
- * Creates a new template by parsing the contents from the given URL. This
- * constructor will fail on syntax error. When the URL points to a file,
- * {@link File#lastModified()} is monitored for changes of the template.
- *
- * @param u
- * the URL to load the template from. UTF-8 is chosen as charset.
- */
- public Template(URL u) {
- try (Reader r = new InputStreamReader(u.openStream(), "UTF-8")) {
- try {
- if (u.getProtocol().equals("file")) {
- source = new File(u.toURI());
- lastLoaded = source.lastModified() + 1000;
- }
- } catch (URISyntaxException e) {
- e.printStackTrace();
- }
- data = parse(r).getBlock(null);
- } catch (IOException e) {
- throw new Error(e);
- }
- }
-
- /**
- * Creates a new template by parsing the contents from the given reader.
- * This constructor will fail on syntax error.
- *
- * @param r
- * the Reader containing the data.
- */
- public Template(Reader r) {
- try {
- data = parse(r).getBlock(null);
- r.close();
- } catch (IOException e) {
- throw new Error(e);
- }
- }
-
- protected ParseResult parse(Reader r) throws IOException {
- return parseContent(r);
- }
-
- protected ParseResult parseContent(Reader r) throws IOException {
- ParseContext context = new ParseContext(r);
- ParseResult result = parseContent(context);
- if (context.parseException.isEmpty()) {
- return result;
- }
- while (context.curChar != -1) {
- parseContent(context);
- }
- throw context.parseException;
- }
-
- protected ParseResult parseContent(ParseContext context) throws IOException {
- LinkedList<String> splitted = new LinkedList<String>();
- LinkedList<Translatable> commands = new LinkedList<Translatable>();
- StringBuffer buf = new StringBuffer();
- String blockType = null;
- ParseContext tContext = null;
- outer:
- while (true) {
- if (tContext != null) {
- context.merge(tContext);
- }
- while ( !endsWith(buf, "<?")) {
- int ch = context.read();
- if (ch == -1) {
- break outer;
- }
- buf.append((char) ch);
- if (endsWith(buf, "\\\n")) {
- buf.delete(buf.length() - 2, buf.length());
- }
- }
- tContext = context.copy();
- buf.delete(buf.length() - 2, buf.length());
- splitted.add(buf.toString());
- buf.delete(0, buf.length());
- while ( !endsWith(buf, "?>")) {
- int ch = context.read();
- if (ch == -1) {
- context.addError("Expected \"?>\"");
- return null;
- }
- buf.append((char) ch);
- }
- buf.delete(buf.length() - 2, buf.length());
- String com = buf.toString().replace("\n", "");
- buf.delete(0, buf.length());
- Matcher m = CONTROL_PATTERN.matcher(com);
- if (m.matches()) {
- String type = m.group(1);
- String variable = m.group(2);
- ParseContext bodyContext = tContext.copy();
- ParseResult body = parseContent(bodyContext);
- if (type.equals("if")) {
- if ("else".equals(body.getEndType())) {
- ParseContext bodyContext2 = bodyContext.copy();
- commands.add(new IfStatement(variable, body.getBlock("else"), parseContent(bodyContext).getBlock("}")));
- bodyContext.merge(bodyContext2);
- } else {
- commands.add(new IfStatement(variable, body.getBlock("}")));
- }
- } else if (type.equals("foreach")) {
- commands.add(new ForeachStatement(variable, body.getBlock("}")));
- } else {
- String bestMatching = EditDistance.getBestMatchingStringByEditDistance(type, POSSIBLE_CONTROL_PATTERNS);
- tContext.addError(String.format(UNKOWN_CONTROL_STRUCTURE_MSG, type, bestMatching));
- }
- tContext.merge(bodyContext);
- continue;
- } else if ((m = ELSE_PATTERN.matcher(com)).matches()) {
- blockType = "else";
- break;
- } else if (com.matches(" ?\\} ?")) {
- blockType = "}";
- break;
- } else {
- commands.add(parseCommand(com, tContext));
- }
- }
- if (tContext != null) {
- context.merge(tContext);
- }
- splitted.add(buf.toString());
- ParseResult result = new ParseResult(new TemplateBlock(splitted.toArray(new String[splitted.size()]), commands.toArray(new Translatable[commands.size()])), blockType);
- return result;
- }
-
- private boolean endsWith(StringBuffer buf, String string) {
- return buf.length() >= string.length() && buf.substring(buf.length() - string.length(), buf.length()).equals(string);
- }
-
- private Translatable parseCommand(String s2, ParseContext context) {
- if (s2.startsWith("=_")) {
- final String raw = s2.substring(2);
- if ( !s2.contains("$") && !s2.contains("!'")) {
- return new TranslateCommand(raw);
- } else {
- return new SprintfCommand(raw);
- }
- } else if (s2.startsWith("=$")) {
- final String raw = s2.substring(2);
- return new OutputVariableCommand(raw);
- } else {
- context.addError("Unknown processing instruction \"" + s2 + "\"," + " did you mean \"" + EditDistance.getBestMatchingStringByEditDistance(s2, new String[] {
- "=_", "=$"
- }) + "\"?");
- return null;
- }
- }
-
- @Override
- public void output(PrintWriter out, Language l, Map<String, Object> vars) {
- tryReload();
- data.output(out, l, vars);
- }
-
- protected void tryReload() {
- if (source != null && lastLoaded < source.lastModified()) {
- System.out.println("Reloading template.... " + source);
- try (InputStreamReader r = new InputStreamReader(new FileInputStream(source), "UTF-8")) {
- data = parse(r).getBlock(null);
- r.close();
- lastLoaded = source.lastModified() + 1000;
- } catch (IOException e) {
- e.printStackTrace();
- }
- }
- }
-
- protected static void outputVar(PrintWriter out, Language l, Map<String, Object> vars, String varname, boolean unescaped) {
- if (vars.containsKey(Outputable.OUT_KEY_PLAIN)) {
- unescaped = true;
- }
- Object s = vars.get(varname);
-
- if (s == null) {
- System.err.println("Empty variable: " + varname);
- }
- if (s instanceof Outputable) {
- ((Outputable) s).output(out, l, vars);
- } else if (s instanceof DayDate) {
- out.print(DateSelector.getDateFormat().format(((DayDate) s).toDate()));
- } else if (s instanceof Boolean) {
- out.print(((Boolean) s) ? l.getTranslation("yes") : l.getTranslation("no"));
- } else if (s instanceof Date) {
- SimpleDateFormat sdfUI = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
- SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'");
- out.print("<time datetime=\"" + sdf.format(s) + "\">");
- out.print(sdfUI.format(s));
- out.print(" UTC</time>");
- } else {
- out.print(s == null ? "null" : (unescaped ? s.toString() : HTMLEncoder.encodeHTML(s.toString())));
- }
- }
-
- public void addTranslations(Collection<String> s) {
- data.addTranslations(s);
- }
-
- private class ParseContext {
-
- public static final int CONTEXT_LENGTH = 20;
-
- private Reader reader;
-
- public final TemplateParseException parseException = new TemplateParseException(source);
-
- int line = 1;
-
- int column = 0;
-
- private int curChar = -1;
-
- private int[] charContext = new int[CONTEXT_LENGTH];
-
- protected int contextPosition = 0;
-
- public ParseContext(Reader reader) {
- this.reader = reader;
- }
-
- public void addError(String message) {
- addError(line, column, message);
- }
-
- public void addError(int line, int column, String message) {
- StringBuffer charContextBuffer = new StringBuffer();
- int j = contextPosition;
- for (int i = 0; i < CONTEXT_LENGTH; i++) {
- if (charContext[j] != 0) {
- if (charContext[j] == '\n') {
- charContextBuffer.append("\\n");
- } else {
- charContextBuffer.appendCodePoint(charContext[j]);
- }
- }
- j = (j + 1) % CONTEXT_LENGTH;
- }
- parseException.addError(line, column, message, charContextBuffer.toString());
- }
-
- public void merge(ParseContext other) {
- line = other.line;
- column = other.column;
- parseException.append(other.parseException);
- }
-
- public void append(ParseContext other) {
- parseException.append(other.parseException);
- }
-
- public int read() throws IOException {
- int ch;
- while ((ch = reader.read()) == '\r') {
- }
- curChar = ch;
- if (ch == '\n') {
- line++;
- column = 0;
- } else {
- column++;
- }
- if (ch != -1) {
- charContext[contextPosition] = ch;
- contextPosition = (contextPosition + 1) % CONTEXT_LENGTH;
- }
- return ch;
- }
-
- public ParseContext copy() {
- ParseContext newParseContext = new ParseContext(reader);
- newParseContext.line = line;
- newParseContext.column = column;
- newParseContext.charContext = Arrays.copyOf(charContext, charContext.length);
- newParseContext.contextPosition = contextPosition;
- return newParseContext;
- }
- }
-}
projects / gigi.git / blobdiff