/*
* Copyright Red Hat Inc. and/or its affiliates and other contributors
* as indicated by the authors tag. All rights reserved.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU General Public License version 2.
*
* This particular file is subject to the "Classpath" exception as provided in the
* LICENSE file that accompanied this code.
*
* This program is distributed in the hope that it will be useful, but WITHOUT A
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* PARTICULAR PURPOSE. See the GNU General Public License for more details.
* You should have received a copy of the GNU General Public License,
* along with this distribution; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
package com.redhat.ceylon.tools.new_;
import java.io.BufferedReader;
import java.io.Console;
import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.regex.Pattern;
public class Variable {
protected final String key;
protected final VariableValidator validator;
protected VariableValue variableValue;
protected Variable(String key, VariableValidator validator, VariableValue variableValue) {
super();
this.key = key;
this.variableValue = variableValue;
this.validator = validator;
}
public String getKey() {
return key;
}
public VariableValue getVariableValue() {
return variableValue;
}
public void setVariableValue(VariableValue varValue) {
this.variableValue = varValue;
}
public VariableValidator getValidator() {
return validator;
}
/**
* Initialize this variable.
* @param projectName the project
* @param env The environment in which to initialize the variable
* @return A list of other variables that will need initializing
*/
public List<Variable> initialize(String projectName, Environment env) {
String value = getVariableValue().getValue(projectName, env);
if (!isValid(value)) {
throw new RuntimeException(Messages.msg("value.invalid", value));
}
env.put(getKey(), value);
List<Variable> subvars = subvars(value);
return subvars != null ? subvars : Collections.<Variable>emptyList();
}
private boolean isValid(String value) {
VariableValidator validator = getValidator();
return validator == null || validator.isValid(value);
}
protected List<Variable> subvars(String value) {
return null;
}
public static Variable directory(String key, String defaultValue) {
PathValidator validator = new PathValidator();
return new Variable(key, validator,
new PromptedValue(key, validator, defaultValue));
}
public static Variable moduleName(String key, String defaultValue) {
PatternValidator validator = new PatternValidator("[a-zA-Z0-9.]+");
return new Variable(key, validator,
new PromptedValue(key, validator, defaultValue));
}
public static Variable moduleDir(final String key, final String moduleNameKey) {
return new Variable(key, null, new VariableValue() {
@Override
public String getValue(String projectName, Environment env) {
return env.get(moduleNameKey).replace('.', '/');
}
});
}
public static Variable moduleVersion(String key, String defaultValue) {
PatternValidator validator = new PatternValidator("[a-zA-Z0-9.]+");
return new Variable(key, validator,
new PromptedValue(key, validator, defaultValue));
}
public static ChoiceVariable booleanVariable(String key, List<Variable> yesVars, List<Variable> noVars, String dv) {
PatternValidator validator = new PatternValidator("true|false");
HashMap<String, List<Variable>> choices = new HashMap<>();
final String oui = Messages.msg("mnemonic.yes");
final String non = Messages.msg("mnemonic.no");
if (oui.equals(non)) {
throw new RuntimeException();
}
choices.put("true", yesVars);
choices.put("false", noVars);
PromptedValue prompt = new PromptedValue(key, dv) {
@Override
protected String parseValue(String readLine) {
return oui.equals(readLine)
|| non.equals(readLine) ? Boolean.toString(readLine.trim().equals(oui)) : null;
}
};
return new ChoiceVariable(key, validator, prompt, choices);
}
public static ChoiceVariable yesNo(String key, Variable... yesVars) {
return booleanVariable(key, Arrays.asList(yesVars), null, null);
}
public static ChoiceVariable yesNo(String key, String dv, Variable... yesVars) {
return booleanVariable(key, Arrays.asList(yesVars), null, dv);
}
}
interface VariableValue {
public String getValue(String projectName, Environment env);
}
class PromptedValue implements VariableValue {
private final String key;
private final String defaultValue;
private final VariableValidator validator;
public PromptedValue(String key) {
this(key, null, null);
}
public PromptedValue(String key, String defaultValue) {
this(key, null, defaultValue);
}
public PromptedValue(String key, VariableValidator validator) {
this(key, validator, null);
}
public PromptedValue(String key, VariableValidator validator, String defaultValue) {
this.key = key;
this.defaultValue = defaultValue;
this.validator = validator;
if (validator != null && defaultValue != null && !validator.isValid(defaultValue)) {
throw new RuntimeException("Default value " + defaultValue + " is not valid");
}
}
protected String getDefaultValue() {
return defaultValue;
}
protected String getDefault(Environment env) {
if (defaultValue == null) {
return defaultValue;
}
Template template = new Template(defaultValue);
return template.eval(env);
}
protected String getPrompt(String projectName, Environment env, String dv) {
String p = Messages.msg(projectName + ".prompt." + key).trim();
if (dv != null) {
p += " [" + dv + "]";
}
p += ": ";
return p;
}
@Override
public String getValue(String projectName, Environment env) {
String value;
while (true) {
String readLine = null;
String dv = getDefault(env);
String prompt = getPrompt(projectName, env, dv);
if (System.console() != null) {
Console console = System.console();
if (console == null) {
throw new RuntimeException(Messages.msg("no.console"));
}
readLine = console.readLine(prompt);
} else {
System.out.print(prompt);
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
try {
readLine = reader.readLine();
} catch (IOException e) {
// Ignore
}
}
if (readLine == null) {
throw new RuntimeException(Messages.msg("exit"));
} else if (readLine.isEmpty() && dv != null) {
readLine = dv;
}
value = parseValue(readLine);
if (value != null) {
break;
}
}
return value;
}
protected String parseValue(String readLine) {
return (validator == null || validator.isValid(readLine)) ? readLine : null;
}
protected List<Variable> subvars(String value) {
return Collections.emptyList();
}
}
class GivenValue implements VariableValue {
private String value;
public GivenValue(String value) {
this.value = value;
}
@Override
public String getValue(String projectName, Environment env) {
return value;
}
}
class ChoiceVariable extends Variable {
private Map<String, List<Variable>> choices;
public ChoiceVariable(String key,
VariableValidator validator,
VariableValue varValue,
Map<String, List<Variable>> choices) {
super(key, validator, varValue);
this.choices = choices;
}
protected List<Variable> subvars(String value) {
return choices.get(value);
}
}
interface VariableValidator {
public boolean isValid(String value);
}
class PatternValidator implements VariableValidator {
private final Pattern pattern;
public PatternValidator(String pattern) {
this.pattern = Pattern.compile(pattern);
}
@Override
public boolean isValid(String value) {
return pattern.matcher(value).matches();
}
}
class PathValidator implements VariableValidator {
@Override
public boolean isValid(String value) {
File f = new File(value);
try {
f.getCanonicalFile();
return true;
} catch (IOException e) {
return false;
}
}
}