package com.temp.client.foundation.support.useragent.nonpublic;

import com.temp.client.foundation.support.useragent.BrowserFamily;
import com.temp.client.foundation.support.useragent.UserAgent;

/**
 * Represents IE - supporting code the UserAgent
 *
 * @author georgs
 */
public class UserAgentIE extends UserAgent {
    private boolean mLegacyIE;

    public UserAgentIE() {
        super(BrowserFamily.IE, "");
        int zVersion = determineSpecificVersion();
        mLegacyIE = (zVersion < 9);
        mSpecific = IE_PREFIX + zVersion;
    }

    @Override
    public boolean isLegacyIE() {
        return mLegacyIE;
    }

    // ; MSIE 6.0;
    // 01234567890
    private static int determineSpecificVersion() {
        String zUserAgent = getBrowserUserAgent();
        int atStart = zUserAgent.indexOf("; MSIE ") + 7;
        int atEnd = zUserAgent.indexOf(".0;", atStart);
        if ((atStart > 6) && (atEnd != -1) && (atEnd <= (atStart + 2))) { // Note: this will only work up to version 99!
            try {
                return Integer.parseInt(zUserAgent.substring(atStart, atEnd));
            } catch (NumberFormatException e) {
                // Really? Then Assume the default
            }
        }
        return 8;
    }
}