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package de.agilecoders.wicket.sass;

import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.Collection;

/**
 * Represents information required to load Sass source from:
 * 
 *     WebJars
 *     classpath
 *     same package, different jar
 * 
 */
class SassSource {

    /**
     * The Sass resource filepath.
     */
    private final String filepath;

    /**
     * The scope class used with SassResourceReference.
     * Used to resolve dependencies with scheme "package!"
     */
    private final String scopeClass;

    /**
     * The collections of Sass sources imported to this source.
     */
    private final Collection importedSources;

    /**
     * Constructor
     *
     * @param filepath The Sass resource filepath
     * @param scopeClass The scope class used to load this Sass resource. Also used to resolve "package!" dependencies
     */
    SassSource(String filepath, String scopeClass) {
        this.filepath = filepath;
        this.scopeClass = scopeClass;
        this.importedSources = new ArrayList<>();
    }

    /**
     *
     * @return the url of Sass resource
     */
    public URL getURL() {
        try {
            return new URL(filepath);
        } catch (MalformedURLException e) {
            throw new IllegalArgumentException("Cannot create a URL to a resource", e);
        }
    }

    /**
     *
     * @return The scope class used to load this Sass resource.
     */
    public String getScopeClass() {
        return scopeClass;
    }

    public Collection getImportedSources() {
        return importedSources;
    }

    public void addImportedSources(Collection sources) {
        importedSources.addAll(sources);
    }
}