Discord Status API snippet, part of the bot that runs https://discord.gg/jn7TAP8

StatusEnum.java

/*
 * Copyright 2018 John Grosh <john.a.grosh@gmail.com>.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package jagbot.status;

import java.awt.Color;
import net.dv8tion.jda.core.entities.Game;
import net.dv8tion.jda.core.entities.Guild;
import net.dv8tion.jda.core.entities.Member;
import net.dv8tion.jda.core.entities.Role;

/**
 *
 * @author John Grosh (john.a.grosh@gmail.com)
 */
public enum StatusEnum
{
    STREAMING(406706951846625280L, "406714314435854346", "#593695"), 
    ONLINE(406706905696960514L, "406714314368745472", "#43b581"), 
    IDLE(406706706978963457L, "406714314289053696", "#faa61a"), 
    DND(406706557867524098L, "406714313940664322", "#f04747"), 
    OFFLINE(0L, "406714314196647937", "#000000");

    private final long roleId;
    private final String emoteId;
    public final Color color;

    private StatusEnum(long roleId, String emote, String color)
    {
        this.roleId = roleId;
        this.emoteId = emote;
        this.color = Color.decode(color);
    }

    public Role getRole(Guild guild)
    {
        return guild.getRoleById(roleId);
    }
    
    public String getEmoteLink()
    {
        return "https://cdn.discordapp.com/emojis/"+emoteId+".png";
    }
    
    public String getEmote()
    {
        return "<:c:"+emoteId+">";
    }
    
    public static StatusEnum from(Member member)
    {
        if(member.getGame()!=null && member.getGame().getType()==Game.GameType.STREAMING)
            return STREAMING;
        switch(member.getOnlineStatus())
        {
            case ONLINE: return ONLINE;
            case IDLE: return IDLE;
            case DO_NOT_DISTURB: return DND;
            default: return OFFLINE;
        }
    }

    public static StatusEnum fromIndicator(String indicator)
    {
        switch(indicator)
        {
            case "none": return ONLINE;
            case "minor": return IDLE;
            case "major": return DND;
            case "critical": return OFFLINE;
            default: return ONLINE;
        }
    }

    public static StatusEnum fromComponent(String component)
    {
        switch(component)
        {
            case "operational": return ONLINE;
            case "degraded_performance": return IDLE;
            case "partial_outage": return DND;
            case "major_outage": return OFFLINE;
            default: return ONLINE;
        }
    }
    
    public static StatusEnum fromIncident(String incident)
    {
        switch(incident.toLowerCase())
        {
            case "investigating": return DND;
            case "identified": return IDLE;
            case "monitoring": return IDLE;
            case "resolved": return ONLINE;
            case "postmortem": return STREAMING;
            default: return STREAMING;
        }
    }
    
    public static String textFormat(String text)
    {
        return text.substring(0, 1).toUpperCase()+text.replace("_", " ").substring(1);
    }
}

StatuspageAPI.java

/*
 * Copyright 2018 John Grosh <john.a.grosh@gmail.com>.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package jagbot.status;

import java.io.IOException;
import java.io.Reader;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.time.OffsetDateTime;
import java.time.temporal.ChronoUnit;
import java.util.LinkedList;
import java.util.List;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
import net.dv8tion.jda.core.EmbedBuilder;
import net.dv8tion.jda.core.entities.MessageEmbed;
import net.dv8tion.jda.webhook.WebhookClient;
import net.dv8tion.jda.webhook.WebhookClientBuilder;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import org.json.JSONArray;
import org.json.JSONObject;
import org.json.JSONTokener;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 *
 * @author John Grosh (john.a.grosh@gmail.com)
 */
public class StatuspageAPI
{
    private final static String STATUS_URL = "https://srhpyqt94yxb.statuspage.io/api/v2/summary.json";
    private final static String INCIDENTS_URL = "https://srhpyqt94yxb.statuspage.io/api/v2/incidents.json";
    private final static String CLICKABLE_INCIDENT = "https://status.discordapp.com/incidents/";
    private final static String WEBHOOK_URL = "https://canary.discordapp.com/api/webhooks/406773511290486795/CENSORED";
    private final static String LATEST_FILE = "latest_status.txt";
    private final static int LATEST_MAX_SIZE = 100;
    private final static Logger LOG = LoggerFactory.getLogger("StatusPage");
    private final ScheduledExecutorService threadpool;
    private final OkHttpClient client;
    private final WebhookClient webhook;
    private final List<String> latestIncidents = new LinkedList<>();
    
    public StatuspageAPI()
    {
        threadpool = Executors.newSingleThreadScheduledExecutor();
        client = new OkHttpClient.Builder().build();
        webhook = new WebhookClientBuilder(WEBHOOK_URL).setHttpClient(client).build();
        try
        {
            latestIncidents.addAll(Files.readAllLines(Paths.get(LATEST_FILE)));
            while(latestIncidents.size()>LATEST_MAX_SIZE)
                latestIncidents.remove(0);
        }
        catch(Exception e)
        {
            LOG.warn("Failed to read latest incidents: "+e);
        }
        threadpool.scheduleWithFixedDelay(()->readIncidents(), 0, 10, TimeUnit.MINUTES);
    }
    
    public DiscordStatus getStatus()
    {
        try(Reader reader = client.newCall(new Request.Builder()
                        .get().url(STATUS_URL)
                        .header("Content-Type", "application/json")
                        .build()).execute().body().charStream())
        {
                    JSONObject obj = new JSONObject(new JSONTokener(reader));
                    JSONObject status = obj.getJSONObject("status");
                    JSONObject page = obj.getJSONObject("page");
                    JSONArray components = obj.getJSONArray("components");
                    DiscordStatus ds = new DiscordStatus(status.getString("indicator"), status.getString("description"), page.getString("updated_at"));
                    JSONObject component;
                    for(int i=0; i<components.length(); i++)
                    {
                        component = components.getJSONObject(i);
                        ds.addComponent(component.getString("name"), component.getString("status"), !component.isNull("group_id"));
                    }
                    JSONArray incidents = obj.getJSONArray("incidents");
                    if(incidents.length()>0)
                    {
                        JSONObject latestIncident = incidents.getJSONObject(incidents.length()-1);
                        JSONObject latestIncidentUpdate = latestIncident.getJSONArray("incident_updates").getJSONObject(latestIncident.getJSONArray("incident_updates").length()-1);
                        ds.setIncident(latestIncident.getString("name"), latestIncident.getString("id"), 
                                latestIncidentUpdate.getString("status"), latestIncidentUpdate.getString("body"), latestIncidentUpdate.getString("created_at"));
                        handleIncidents(incidents);
                    }
                    return ds;
        } catch (Exception e)
        {
            LOG.error("Failed to read summary: ", e);
        }
        return null;
    }
    
    private void readIncidents()
    {
        try(Reader reader = client.newCall(new Request.Builder()
                        .get().url(INCIDENTS_URL)
                        .header("Content-Type", "application/json")
                        .build()).execute().body().charStream())
        {
                    JSONObject obj = new JSONObject(new JSONTokener(reader));
                    handleIncidents(obj.getJSONArray("incidents"));
        } catch (Exception e)
        {
            LOG.error("Failed to read summary: ", e);
        }
    }
    
    private void handleIncidents(JSONArray incidents)
    {
        List<MessageEmbed> embeds = new LinkedList<>();
        for(int i=incidents.length()-1; i>=0; i--)
        {
            JSONObject incident = incidents.getJSONObject(i);
            JSONArray updates = incident.getJSONArray("incident_updates");
            for(int j=updates.length()-1; j>=0; j--)
            {
                JSONObject update = updates.getJSONObject(j);
                OffsetDateTime time = OffsetDateTime.parse(update.getString("created_at"));
                if(time.until(OffsetDateTime.now(), ChronoUnit.DAYS)>3)
                    continue;
                String uid = incident.getString("id")+"-"+update.getString("id");
                if(latestIncidents.contains(uid))
                    continue;
                latestIncidents.add(uid);
                StatusEnum status = StatusEnum.fromIncident(update.getString("status"));
                String body = update.getString("body");
                if(body.length()>2048)
                    body = body.substring(0,2040)+" (...)";
                embeds.add(new EmbedBuilder()
                        .setTitle(incident.getString("name"), CLICKABLE_INCIDENT+incident.getString("id"))
                        .setDescription(body)
                        .setColor(status.color)
                        .setFooter(StatusEnum.textFormat(update.getString("status")), status.getEmoteLink())
                        .setTimestamp(time)
                        .build());
                
            }
        }
        if(!embeds.isEmpty())
        {
            while(latestIncidents.size()>LATEST_MAX_SIZE)
                latestIncidents.remove(0);
            StringBuilder sb = new StringBuilder();
            latestIncidents.forEach(i -> sb.append("\n").append(i));
            try
            {
                Files.write(Paths.get(LATEST_FILE), sb.toString().trim().getBytes());
            }
            catch(IOException ex)
            {
                LOG.warn("Failed to write incidents: "+ex);
            }
        }
        while(embeds.size()>5)
        {
            webhook.send(embeds.subList(0, 5));
            embeds.subList(0, 5).clear();
        }
        if(!embeds.isEmpty())
            webhook.send(embeds);
    }
    
    
    public class DiscordStatus
    {
        public final StatusEnum status;
        public final String statusDescription;
        public final OffsetDateTime lastUpdate;
        public final List<Component> components;
        public Incident latestIncident;
        
        private DiscordStatus(String indicator, String description, String lastUpdate)
        {
            this.status = StatusEnum.fromIndicator(indicator);
            this.statusDescription = description;
            this.lastUpdate = OffsetDateTime.parse(lastUpdate);
            this.components = new LinkedList<>();
        }
        
        private void addComponent(String name, String status, boolean grouped)
        {
            this.components.add(new Component(name, status, grouped));
        }
        
        private void setIncident(String name, String id, String status, String body, String time)
        {
            this.latestIncident = new Incident(name, id, status, body, time);
        }
        
        public class Incident
        {
            public final String name;
            public final String id;
            public final String status;
            public final String body;
            public final OffsetDateTime time;
            
            private Incident(String name, String id, String status, String body, String time)
            {
                this.name = name;
                this.id = id;
                this.status = status;
                this.body = body;
                this.time = OffsetDateTime.parse(time);
            }
            
            public String getURL()
            {
                return CLICKABLE_INCIDENT+id;
            }
            
            public StatusEnum getStatus()
            {
                return StatusEnum.fromIncident(status);
            }
        }
        
        public class Component
        {
            public final String name;
            public final String status;
            public final boolean grouped;
            
            private Component(String name, String status, boolean grouped)
            {
                this.name = name;
                this.status = status;
                this.grouped = grouped;
            }
            
            public StatusEnum getStatus()
            {
                return StatusEnum.fromComponent(status);
            }
        }
    }
}