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 * CruiseControl, a Continuous Integration Toolkit
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package net.sourceforge.cruisecontrol.dashboard.web;

import java.io.File;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import net.sourceforge.cruisecontrol.dashboard.service.ConfigurationService;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

public class ConfigInterceptor implements HandlerInterceptor {
    private ConfigurationService configuration;
    public static final String FORCE_BUILD_ENABLED_KEY = "global_force_build_enabled";
    public static final String HAS_DASHBOARD_CONFIG_KEY = "has_dashboard_config";

    public ConfigInterceptor(ConfigurationService configuration) {
        this.configuration = configuration;
    }

    public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse,
            Object object) throws Exception {
        return true;
    }

    public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse,
            Object object, ModelAndView modelAndView) throws Exception {
        if (modelAndView == null) {
            // TODO: error or warning?
            return;
        }
        Map model = modelAndView.getModel();
        if (model == null) {
            // TODO: error or warning?
            return;
        }
        model.put(FORCE_BUILD_ENABLED_KEY, String.valueOf(configuration.isForceBuildEnabled()));
        model.put(HAS_DASHBOARD_CONFIG_KEY, String.valueOf(hasDashboardConfig()));
    }

    public void afterCompletion(HttpServletRequest httpServletRequest,
            HttpServletResponse httpServletResponse, Object object, Exception exception) throws Exception {
    }

    private boolean hasDashboardConfig() {
        String configLocation = configuration.getDashboardConfigLocation();
        return configLocation != null && new File(configLocation).exists();
    }

}