From 2cd688dc176f922cf47aa57bcead303581800a5d Mon Sep 17 00:00:00 2001
From: Michel Zimmer <michel.zimmer@neuland-bfi.de>
Date: Mon, 29 Aug 2022 20:33:25 +0200
Subject: [PATCH] Add connections to host details pane

---
 Dockerfile                 |  2 +-
 package.json               |  2 +-
 src/HostDetails.module.css | 14 +++++-
 src/HostDetails.tsx        | 95 ++++++++++++++++++++++++++++++++++++--
 src/Main.module.css        |  1 +
 src/Main.tsx               | 11 +++--
 src/Stats.ts               | 34 ++++++++++----
 src/index.css              |  2 +-
 8 files changed, 140 insertions(+), 21 deletions(-)

diff --git a/Dockerfile b/Dockerfile
index a4bd7f7..f9f5cb5 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -24,5 +24,5 @@ LABEL org.opencontainers.image.vendor="neuland – Büro für Informatik GmbH"
 LABEL org.opencontainers.image.licenses="MIT"
 LABEL org.opencontainers.image.title="bandwhichd-ui"
 LABEL org.opencontainers.image.description="bandwhichd ui displaying network topology and statistics"
-LABEL org.opencontainers.image.version="0.2.0"
+LABEL org.opencontainers.image.version="0.3.0"
 COPY --from=build --chown=root:root /home/node/dist /usr/share/nginx/html
\ No newline at end of file
diff --git a/package.json b/package.json
index e88cb6b..1674f66 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "bandwhichd-ui",
-  "version": "0.2.0",
+  "version": "0.3.0",
   "description": "bandwhichd ui displaying network topology and statistics",
   "license": "MIT",
   "private": true,
diff --git a/src/HostDetails.module.css b/src/HostDetails.module.css
index 2f10ce9..911608c 100644
--- a/src/HostDetails.module.css
+++ b/src/HostDetails.module.css
@@ -1,7 +1,17 @@
-.hostDetails {
+.host-details {
     background-color: #eeeeee;
 }
 
-.hostDetails > section {
+.host-details > section {
     padding: .5em;
+}
+
+.host-details > section > ul {
+    list-style-type: none;
+    margin: 0;
+    padding: 0;
+}
+
+.host-details > section > ul > li + li {
+    margin-top: .5em;
 }
\ No newline at end of file
diff --git a/src/HostDetails.tsx b/src/HostDetails.tsx
index 48f4774..8e3d517 100644
--- a/src/HostDetails.tsx
+++ b/src/HostDetails.tsx
@@ -1,9 +1,12 @@
-import { Host } from "./Stats";
+import { Map } from "immutable";
+import { Connection, Host, HostId, Stats, UnmonitoredHost } from "./Stats";
 
 import style from "./HostDetails.module.css";
 
 export interface HostDetailsProps {
-    maybeSelectedHost: Host | null;
+    maybeStats: Stats | null;
+    maybeSelectedHost: Host & { hostId: HostId } | null;
+    setMaybeSelectedHostId: (maybeSelectedHostId: HostId | null) => void,
 }
 
 export const HostDetails: React.FC<HostDetailsProps> =
@@ -13,9 +16,95 @@ export const HostDetails: React.FC<HostDetailsProps> =
         }
         const selectedHost = props.maybeSelectedHost;
 
-        return <aside className={style.hostDetails}>
+        const connectionsToMonitoredHosts = selectedHost
+            .connections
+            .flatMap<HostId, { hostDetails: Host, connectionDetails: Connection }>((connection, hostId) => {
+                if (props.maybeStats === null) {
+                    return Map<HostId, { hostDetails: Host, connectionDetails: Connection }>();
+                }
+                const stats = props.maybeStats;
+
+                const maybeMonitoredHost = stats.hosts.get(hostId, null);
+                if (maybeMonitoredHost === null) {
+                    return Map<HostId, { hostDetails: Host, connectionDetails: Connection }>();
+                }
+                const monitoredHost = maybeMonitoredHost;
+
+                return Map<HostId, { hostDetails: Host, connectionDetails: Connection }>({
+                    [hostId]: {
+                        hostDetails: monitoredHost,
+                        connectionDetails: connection,
+                    },
+                });
+            });
+
+        const connectionsToUnmonitoredHosts = selectedHost
+            .connections
+            .flatMap<HostId, { unmonitoredHostDetails: UnmonitoredHost, connectionDetails: Connection }>((connection, hostId) => {
+                if (props.maybeStats === null) {
+                    return Map<HostId, { unmonitoredHostDetails: UnmonitoredHost, connectionDetails: Connection }>();
+                }
+                const stats = props.maybeStats;
+
+                const maybeUnmonitoredHost = stats.unmonitoredHosts.get(hostId, null);
+                if (maybeUnmonitoredHost === null) {
+                    return Map<HostId, { unmonitoredHostDetails: UnmonitoredHost, connectionDetails: Connection }>();
+                }
+                const unmonitoredHost = maybeUnmonitoredHost;
+
+                return Map<HostId, { unmonitoredHostDetails: UnmonitoredHost, connectionDetails: Connection }>({
+                    [hostId]: {
+                        unmonitoredHostDetails: unmonitoredHost,
+                        connectionDetails: connection,
+                    },
+                });
+            });
+
+        return <aside className={style["host-details"]}>
             <section>
                 <p>{selectedHost.hostname}</p>
             </section>
+            <section>
+                {
+                    connectionsToMonitoredHosts.isEmpty() && <p>No connections to monitored hosts</p>
+                }
+                {
+                    !connectionsToMonitoredHosts.isEmpty() && <>
+                        <p>Connections to monitored hosts:</p>
+                        <ul>
+                            {
+                                connectionsToMonitoredHosts
+                                    .entrySeq()
+                                    .sortBy(([_, {hostDetails}]) => hostDetails.hostname)
+                                    .map(([hostId, { hostDetails }]) => <li key={hostId}>
+                                        {
+                                            hostId === selectedHost.hostId
+                                                ? <button disabled>{hostDetails.hostname}</button>
+                                                : <button onClick={_ => props.setMaybeSelectedHostId(hostId)}>{hostDetails.hostname}</button>
+                                        }
+                                    </li>)
+                            }
+                        </ul>
+                    </>
+                }
+            </section>
+            <section>
+                {
+                    connectionsToUnmonitoredHosts.isEmpty() && <p>No connections to unmonitored hosts</p>
+                }
+                {
+                    !connectionsToUnmonitoredHosts.isEmpty() && <>
+                        <p>Connections to unmonitored hosts:</p>
+                        <ul>
+                            {
+                                connectionsToUnmonitoredHosts
+                                    .entrySeq()
+                                    .sortBy(([_, {unmonitoredHostDetails}]) => unmonitoredHostDetails.host)
+                                    .map(([hostId, { unmonitoredHostDetails }]) => <li key={hostId}>{unmonitoredHostDetails.host}</li>)
+                            }
+                        </ul>
+                    </>
+                }
+            </section>
         </aside>;
     };
\ No newline at end of file
diff --git a/src/Main.module.css b/src/Main.module.css
index f89b2f1..eb34396 100644
--- a/src/Main.module.css
+++ b/src/Main.module.css
@@ -8,6 +8,7 @@
 .main > aside {
     flex-grow: 0;
     flex-shrink: 0;
+    overflow-y: scroll;
 }
 
 .main > section {
diff --git a/src/Main.tsx b/src/Main.tsx
index 868ab05..b106d0d 100644
--- a/src/Main.tsx
+++ b/src/Main.tsx
@@ -12,10 +12,15 @@ export const Main: React.FC =
         const [maybeStats, setMaybeStats] = useState<Stats | null>(null);
         const [maybeSelectedHostId, setMaybeSelectedHostId] = useState<HostId | null>(null);
 
-        const maybeSelectedHost: Host | null =
+        const maybeSelectedHostWithoutId =
             maybeStats === null || maybeSelectedHostId === null
                 ? null
-                : maybeStats.hosts.get(maybeSelectedHostId, null);
+                : maybeStats.hosts.get(maybeSelectedHostId, null)
+
+        const maybeSelectedHost: Host & { hostId: HostId } | null =
+            maybeSelectedHostId === null || maybeSelectedHostWithoutId == null
+                ? null
+                : { hostId: maybeSelectedHostId, ...maybeSelectedHostWithoutId };
 
         useEffect(() => {
             fetchStats(configuration).then(stats => {
@@ -26,6 +31,6 @@ export const Main: React.FC =
         return <main className={styles.main}>
             <NodeSelector {...{ maybeStats, maybeSelectedHostId, setMaybeSelectedHostId }} />
             <Graph {...{ maybeSelectedHostId, setMaybeSelectedHostId }} />
-            <HostDetails {...{ maybeSelectedHost }} />
+            <HostDetails {...{ maybeStats, maybeSelectedHost, setMaybeSelectedHostId }} />
         </main>;
     };
\ No newline at end of file
diff --git a/src/Stats.ts b/src/Stats.ts
index ecda98b..6f3049d 100644
--- a/src/Stats.ts
+++ b/src/Stats.ts
@@ -9,35 +9,49 @@ import { decode } from "./lib/io-ts/promiseUtils";
 const hostIdTag = Symbol("HostId");
 export type HostId = string & { readonly _tag: typeof hostIdTag; };
 const createHostId: (value: string) => HostId = (value) => value as HostId;
-export const hostIdDecoder = Decoder.map(createHostId)(Decoder.string);
+const hostIdDecoder = Decoder.map(createHostId)(Decoder.string);
 
 const hostnameTag = Symbol("Hostname");
 export type Hostname = string & { readonly _tag: typeof hostnameTag; };
 const createHostname: (value: string) => Hostname = (value) => value as Hostname;
-export const hostnameDecoder = Decoder.map(createHostname)(Decoder.string);
+const hostnameDecoder = Decoder.map(createHostname)(Decoder.string);
+
+export interface Connection { }
+const connectionDecoder = Decoder.struct({});
 
 export interface Host {
     readonly hostname: Hostname;
+    readonly connections: Map<HostId, Connection>;
 }
-export const hostDecoder = Decoder.struct({
+const hostDecoder = Decoder.struct({
     hostname: hostnameDecoder,
+    connections: mapDecoder(hostIdDecoder, connectionDecoder),
+});
+
+export interface UnmonitoredHost {
+    host: string;
+}
+const unmonitoredHostDecoder = Decoder.struct({
+    host: Decoder.string,
 });
 
 export interface Stats {
-    hosts: Map<HostId, Host>
+    hosts: Map<HostId, Host>;
+    unmonitoredHosts: Map<HostId, UnmonitoredHost>;
 }
-export const statsDecoder = Decoder.struct({
+const statsDecoder = Decoder.struct({
     hosts: mapDecoder(hostIdDecoder, hostDecoder),
+    unmonitoredHosts: mapDecoder(hostIdDecoder, unmonitoredHostDecoder),
 });
 
-export const fetchStats = 
+export const fetchStats =
     async (configuration: Configuration): Promise<Stats> =>
-        await fetch(`${configuration.apiServer}/v1/stats`, {
+        await window.fetch(`${configuration.apiServer}/v1/stats`, {
             method: "GET",
             headers: {
                 "Accept": "application/json; q=1.0"
             }
         })
-        .then(rejectNonOk())
-        .then(parseBodyAsJson())
-        .then(decode(statsDecoder));
\ No newline at end of file
+            .then(rejectNonOk())
+            .then(parseBodyAsJson())
+            .then(decode(statsDecoder));
\ No newline at end of file
diff --git a/src/index.css b/src/index.css
index 104c2b4..239e5d0 100644
--- a/src/index.css
+++ b/src/index.css
@@ -5,5 +5,5 @@ html, body, #bandwhichd-root {
 #bandwhichd-root {
     display: grid;
     grid-template-columns: 1fr;
-    grid-template-rows: min-content 1fr min-content;
+    grid-template-rows: min-content minmax(20em, 1fr) min-content;
 }
\ No newline at end of file