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package com.juick.www.configuration;

import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.datatype.jdk8.Jdk8Module;
import com.juick.www.formatter.SpringDateFormatter;
import nz.net.ultraq.thymeleaf.LayoutDialect;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
import org.springframework.format.FormatterRegistry;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.Jackson2ObjectMapperBuilder;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;
import org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping;
import org.springframework.web.servlet.resource.PathResourceResolver;
import org.thymeleaf.extras.springsecurity4.dialect.SpringSecurityDialect;
import org.thymeleaf.spring4.SpringTemplateEngine;
import org.thymeleaf.spring4.templateresolver.SpringResourceTemplateResolver;
import org.thymeleaf.spring4.view.ThymeleafViewResolver;
import org.thymeleaf.templatemode.TemplateMode;

import java.util.List;

/**
 * Created by vitalyster on 28.06.2016.
 */
@Configuration
@ComponentScan(basePackages = {"com.juick.www.controllers"})
@PropertySource("classpath:juick.conf")
public class WwwServletConfiguration extends WebMvcConfigurationSupport {

    @Bean
    public SpringResourceTemplateResolver templateResolver() {
        // SpringResourceTemplateResolver automatically integrates with Spring's own
        // resource resolution infrastructure, which is highly recommended.
        SpringResourceTemplateResolver templateResolver = new SpringResourceTemplateResolver();
        templateResolver.setApplicationContext(getApplicationContext());
        templateResolver.setPrefix("/WEB-INF/templates/");
        templateResolver.setSuffix(".html");
        // HTML is the default value, added here for the sake of clarity.
        templateResolver.setTemplateMode(TemplateMode.HTML);
        // Template cache is true by default. Set to false if you want
        // templates to be automatically updated when modified.
        templateResolver.setCacheable(true);

        templateResolver.setCharacterEncoding("UTF-8");
        return templateResolver;
    }

    @Bean
    public SpringTemplateEngine templateEngine() {
        // SpringTemplateEngine automatically applies SpringStandardDialect and
        // enables Spring's own MessageSource message resolution mechanisms.
        SpringTemplateEngine templateEngine = new SpringTemplateEngine();
        templateEngine.setTemplateResolver(templateResolver());
        // Enabling the SpringEL compiler with Spring 4.2.4 or newer can
        // speed up execution in most scenarios, but might be incompatible
        // with specific cases when expressions in one template are reused
        // across different data types, so this flag is "false" by default
        // for safer backwards compatibility.
        templateEngine.setEnableSpringELCompiler(true);
        // Thymeleaf Layout Dialect
        templateEngine.addDialect(new LayoutDialect());
        // Thymeleaf Spring Security integration dialect
        templateEngine.addDialect(new SpringSecurityDialect());

        return templateEngine;
    }

    @Bean
    public ThymeleafViewResolver viewResolver() {
        ThymeleafViewResolver viewResolver = new ThymeleafViewResolver();
        viewResolver.setTemplateEngine(templateEngine());
        viewResolver.setCharacterEncoding("UTF-8");
        return viewResolver;
    }

    @Override
    protected void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
        Jackson2ObjectMapperBuilder builder = new Jackson2ObjectMapperBuilder()
                .serializationInclusion(JsonInclude.Include.NON_DEFAULT)
                .serializationInclusion(JsonInclude.Include.NON_NULL)
                .serializationInclusion(JsonInclude.Include.NON_ABSENT)
                .serializationInclusion(JsonInclude.Include.NON_EMPTY);

        MappingJackson2HttpMessageConverter converter = new MappingJackson2HttpMessageConverter(builder.build());
        converter.getObjectMapper().registerModule(new Jdk8Module());
        converters.add(converter);

        super.configureMessageConverters(converters);
    }

    @Override
    protected void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.setOrder(0);
        registry.addResourceHandler(
                "/scripts.js*",
                "/style.css*",
                "/*.png",
                "/favicon.ico")
                .addResourceLocations("/")
                .resourceChain(true)
                .addResolver(new PathResourceResolver());
        registry.addResourceHandler("/static/**").addResourceLocations("/static/");
    }

    @Override
    public RequestMappingHandlerMapping requestMappingHandlerMapping() {
        RequestMappingHandlerMapping result = super.requestMappingHandlerMapping();

        result.setOrder(1);

        return result;
    }

    @Override
    public void addFormatters(final FormatterRegistry registry) {
        registry.addFormatter(dateFormatter());
    }

    @Bean
    public SpringDateFormatter dateFormatter() {
        return new SpringDateFormatter();
    }
}