monfront - add check detail view

This adds a detail view for a single check. The purpose is to view
notifications for this check alone and get the context information on
the node it belongs to, the command and settings.

cmd/monfront/main.go

@@ -30,8 +30,11 @@ type (
 
 	Context struct {
 		Title        string
+		CurrentPath  string
+		Error        string
 		Mappings     map[int]map[int]MapEntry
 		Checks       []check
+		CheckDetails *checkDetails
 		Groups       []group
 	}
 
@@ -54,6 +57,42 @@ type (
 		Msg         string
 	}
 
+	checkDetails struct {
+		Id             int64
+		Message        string
+		Enabled        bool
+		Updated        time.Time
+		LastRefresh    time.Time
+		NextTime       time.Time
+		MappingId      int
+		MappingName    string
+		NodeId         int
+		NodeName       string
+		NodeMessage    string
+		CommandId      int
+		CommandName    string
+		CommandLine    []string
+		CommandMessage string
+		States         []int64
+		Notice         sql.NullString
+		Notifiers      []notifier
+		Notifications  []notification
+	}
+
+	notifier struct {
+		Id      int
+		Name    string
+		Enabled bool
+	}
+
+	notification struct {
+		Id       int64
+		States   []int
+		Output   string
+		Inserted time.Time
+		Sent     time.Time
+	}
+
 	group struct {
 		GroupId   int
 		Name      string
@@ -90,7 +129,10 @@ func main() {
 	Tmpl = tmpl
 
 	http.HandleFunc("/", showChecks)
+	http.HandleFunc("/static/", showStatic)
 	http.HandleFunc("/check", showCheck)
+	http.HandleFunc("/group", showGroup)
+	http.HandleFunc("/node", showNode)
 	http.HandleFunc("/checks", showChecks)
 	http.HandleFunc("/groups", showGroups)
 	http.HandleFunc("/action", checkAction)
@@ -100,6 +142,7 @@ func main() {
 }
 
 func checkAction(w http.ResponseWriter, r *http.Request) {
+	con := Context{}
 	if r.Method != "POST" {
 		w.WriteHeader(http.StatusMethodNotAllowed)
 		w.Write([]byte("method is not supported"))
@@ -157,8 +200,8 @@ func checkAction(w http.ResponseWriter, r *http.Request) {
 		w.WriteHeader(http.StatusSeeOther)
 		return
 	default:
-		w.WriteHeader(http.StatusNotFound)
+		con.Error = fmt.Sprintf("requested action '%s' does not exist", action[0])
-		fmt.Fprintf(w, "unknown action %s", action)
+		returnError(http.StatusNotFound, con, w)
 		return
 	}
 	whereColumn := "id"
@@ -194,7 +237,7 @@ func showChecks(w http.ResponseWriter, r *http.Request) {
 	left join ( select distinct check_id from checks_notify where enabled = true) cn on c.id = cn.check_id`
 	where := []string{}
 	if strings.HasPrefix(r.URL.Path, "/unhandled") {
-		where = append(where, `ac.states[1] > 0 and ac.acknowledged = false`)
+		where = append(where, `ac.states[1] > 0 and ac.acknowledged = false and ac.enabled = true`)
 	}
 	idx := 0
 	params := []interface{}{}
@@ -252,6 +295,7 @@ func showChecks(w http.ResponseWriter, r *http.Request) {
 		Checks: checks,
 	}
 	if err := loadMappings(&con); err != nil {
+		con.Error = "could not load mapping data"
 		w.WriteHeader(http.StatusInternalServerError)
 		w.Write([]byte("problem with the mappings"))
 		log.Printf("could not load mappings: %s", err)
@@ -267,10 +311,6 @@ func showChecks(w http.ResponseWriter, r *http.Request) {
 	return
 }
 
-// showCheck loads shows the notifications for a specific check.
-func showCheck(w http.ResponseWriter, r *http.Request) {
-}
-
 func showGroups(w http.ResponseWriter, r *http.Request) {
 	query := `select groupid, groupname, nodeid, nodename, mapping_id, state
 	from (
@@ -326,6 +366,73 @@ func showGroups(w http.ResponseWriter, r *http.Request) {
 	return
 }
 
+// showCheck loads shows the notifications for a specific check.
+func showCheck(w http.ResponseWriter, r *http.Request) {
+	cd := checkDetails{}
+	con := Context{CheckDetails: &cd}
+	id, found := r.URL.Query()["check_id"]
+	if !found {
+		con.Error = "no check given to view"
+		returnError(http.StatusNotFound, con, w)
+		return
+	}
+	query := `select c.id, c.message, c.enabled, c.updated, c.last_refresh,
+		m.id, m.name, n.id, n.name, n.message, co.id, co.Name, co.message,
+		ac.cmdline, ac.states, ac.msg
+	from checks c
+	join active_checks ac on c.id = ac.check_id
+	join nodes n on c.node_id = n.id
+	join commands co on c.command_id = co.id
+	join mappings m on ac.mapping_id = m.id
+	where c.id = $1::bigint`
+	err := DB.QueryRow(query, id[0]).Scan(&cd.Id, &cd.Message, &cd.Enabled, &cd.Updated, &cd.LastRefresh,
+		&cd.MappingId, &cd.MappingName, &cd.NodeId, &cd.NodeName, &cd.NodeMessage,
+		&cd.CommandId, &cd.CommandName, &cd.CommandMessage,
+		pq.Array(&cd.CommandLine), pq.Array(&cd.States), &cd.Notice)
+	if err != nil {
+		w.WriteHeader(http.StatusInternalServerError)
+		w.Write([]byte("problems with the database"))
+		log.Printf("could not get check details for check id %s: %s", id[0], err)
+		return
+	}
+
+	// TODO load the last couple notifications
+
+	if err := loadMappings(&con); err != nil {
+		w.WriteHeader(http.StatusInternalServerError)
+		w.Write([]byte("problem with the mappings"))
+		log.Printf("could not load mappings: %s", err)
+		return
+	}
+
+	w.Header()["Content-Type"] = []string{"text/html"}
+	if err := Tmpl.ExecuteTemplate(w, "check", con); err != nil {
+		w.WriteHeader(http.StatusInternalServerError)
+		w.Write([]byte("problem with a template"))
+		log.Printf("could not execute template: %s", err)
+		return
+	}
+}
+func showGroup(w http.ResponseWriter, r *http.Request) {
+	// TODO implement showing all nodes only from one group and its message?
+	return
+}
+func showNode(w http.ResponseWriter, r *http.Request) {
+	// TODO implement showing all checks from one node and its message?
+	return
+}
+
+func returnError(status int, con Context, w http.ResponseWriter) {
+	w.Header()["Content-Type"] = []string{"text/html"}
+	w.WriteHeader(status)
+	if err := Tmpl.ExecuteTemplate(w, "error", con); err != nil {
+		w.WriteHeader(http.StatusInternalServerError)
+		w.Write([]byte("problem with a template"))
+		log.Printf("could not execute template: %s", err)
+	}
+
+}
+
 func loadMappings(c *Context) error {
 	c.Mappings = map[int]map[int]MapEntry{}
 	rows, err := DB.Query(SQLShowMappings)
@@ -356,6 +463,20 @@ func loadMappings(c *Context) error {
 	return nil
 }
 
+func showStatic(w http.ResponseWriter, r *http.Request) {
+	file := strings.TrimPrefix(r.URL.Path, "/static/")
+	raw, found := Static[file]
+	if !found {
+		w.WriteHeader(http.StatusNotFound)
+		w.Write([]byte("file does not exist"))
+		return
+	}
+	w.Header()["Content-Type"] = []string{"image/svg+xml"}
+	w.WriteHeader(http.StatusOK)
+	w.Write([]byte(raw))
+	return
+}
+
 var (
 	SQLShowMappings = `select mapping_id, target, title, color
 	from mapping_level`
@@ -367,6 +488,7 @@ var (
 <html>
 	<head>
 		<title>{{ .Title }}</title>
+		<link rel="shortcut icon" href="/static/favicon" />
 		<style type="text/css">
 			* { font-size: 100%; }
 			body { display: flex; flex-direction: column; padding: 0; margin: 0; }
@@ -409,14 +531,26 @@ var (
 			table tr:hover { background: #dfdfdf; }
 			table th { background: #cccccc; color: #3a5f78; }
 			table td, table th { text-align: center; }
-			table pre { font-size: 75%; }
+			table code { font-size: 75%; }
 			table td.disabled { text-decoration: line-through; }
-			.icon { height: 1em; margin: 0; width: 1em; vertical-align: bottom; margin-right: 0.5em;}
+			.icon {
-			{{ range $mapId, $mapping := .Mappings }}
+				display: inline-block;
-			{{ range $target, $val := $mapping }}
+				height: 1em;
-			td.state-{{ $mapId }}-{{ $target }} { background: {{ $val.Color }}; }
+				margin: 0;
-			{{ end }}
+				width: 1em;
-			{{ end }}
+				vertical-align: bottom;
+				margin-right: 0.5em;
+				background-size: contain;
+			}
+			.mute {
+				background-image: url(/static/icon-mute);
+			}
+			/* state background colors */
+			{{ range $mapId, $mapping := .Mappings -}}
+			{{ range $target, $val := $mapping -}}
+			.state-{{ $mapId }}-{{ $target }} { background: {{ $val.Color }}; }
+			{{ end -}}
+			{{ end -}}
 		</style>
 		<script>
 			setTimeout(function() { if (document.activeElement.tagName == "BODY") { location.reload(true) } }, 30000)
@@ -448,7 +582,8 @@ var (
 				</li>
 				<li class="submenu"><span class="header">{{ now.Format "2006.01.02 15:04:05" }}</span></li>
 			</ul>
-		</nav>`,
+		</nav>
+		{{ if .Error }}<div class="error">{{ .Error }}</div>{{ end }}`,
 		"footer": `</body></html>`,
 		"checklist": `{{ template "header" . }}
 		<form method="post" action="/action">
@@ -482,9 +617,9 @@ var (
 						<tr>
 							<td><input type="checkbox" name="checks" value="{{ .CheckID }}" /></td>
 							<td>{{ if ne $current .NodeName }}{{ $current = .NodeName }}<a href="/checks?node_id={{ .NodeId }}">{{ .NodeName }}</a>{{ end }}</td>
-							<td class="state-{{ .MappingId }}-{{ .State }}">{{ if ne .Notify true }}{{ template "icon-mute" . }}{{ end }}{{ .CommandName }} - {{ (index $mapping .MappingId .State).Title }}</td>
+							<td class="state-{{ .MappingId }}-{{ .State }}">{{ if ne .Notify true }}<span class="icon mute"></span>{{ end }}<a href="/check?check_id={{ .CheckID }}">{{ .CommandName }}</a> - {{ (index $mapping .MappingId .State).Title }}</td>
 							<td {{ if ne .Enabled true }}title="This check is disabled." class="disabled"{{ end }}>{{ .NextTime.Format "2006.01.02 15:04:05" }} - in {{ in .NextTime }}</td>
-							<td><pre>{{ .Msg }}</pre></td>
+							<td><code>{{ .Msg }}</code></td>
 						</tr>
 						{{ end }}
 						</tbody>
@@ -492,8 +627,7 @@ var (
 				</content>
 		</form>
 		{{ template "footer" . }}`,
-		"grouplist": `{{ template "header" . }}
+		"checkformheader": `<form method="post" action="/action">
-		<form method="post" action="/action">
 			<section>
 				<nav>
 					<div class="option">
@@ -513,7 +647,10 @@ var (
 					<input name="comment" />
 					</div>
 					<button type="submit">submit</button>
-				</nav>
+				</nav>`,
+		"checkformfooter": `</section></form>`,
+		"grouplist": `{{ template "header" . }}
+		{{ template "checkformheader" . }}
 			<content>
 				<table>
 					<thead><tr><th></th><th>group</th><th>host</th><th>worst state</th></tr></thead>
@@ -531,14 +668,51 @@ var (
 					</tbody>
 				</table>
 			</content>
-		</form>
+		{{ template "checkformfooter" . }}
 		{{ template "footer" . }}`,
-		"icon-mute": `<svg class="icon" width="100" height="100" viewBox="0 0 35.3 35.3" version="1.1"><title>Check is muted</title><style>.s0{fill:#191919;}</style><g transform="translate(0,-261.72223)"><path d="m17.6 261.7v35.3L5.3 284.7H0v-10.6l5.3 0zM30.2 273.1l-3.7 3.7-3.7-3.7-2.5 2.5 3.7 3.7-3.7 3.7 2.5 2.5 3.7-3.7 3.7 3.7 2.5-2.5-3.7-3.7 3.7-3.7z" fill="#191919"/></g></svg>`,
+		"check": `{{ template "header" . }}
+		{{ template "checkformheader" . }}
+		<content>
+			{{ $mapping := .Mappings }}
+			{{ with .CheckDetails }}
+				<input type="hidden" name="check_id" value="{{ .Id }}" />
+				<article>
+					<h1>check</h1>
+					<div><span class="label">current state</span><span class="value state-{{ .MappingId }}-{{ index .States 0 }}">{{ (index $mapping .MappingId (index .States 0) ).Title }}</span></div>
+					<div><span class="label">current notice</span><span class="value">{{ if .Notice }}{{ .Notice.String }}{{ end }}</span></div>
+					<div><span class="label">Message</span><span class="value">{{ .Message }}</span></div>
+					<div><span class="label">enabled</span><span class="value">{{ .Enabled }}</span></div>
+					<div><span class="label">updated</span><span class="value">{{ .Updated.Format "2006.01.02 15:04:05" }}</span></div>
+					<div><span class="label">next check</span><span class="value">{{ .NextTime.Format "2006.01.02 15:04:05" }}</span></div>
+					<div><span class="label">last refresh</span><span class="value">{{ .LastRefresh.Format "2006.01.02 15:04:05" }}</span></div>
+					<div><span class="label">mapping</span><span class="value">{{ .MappingId }}</span></div>
+				</article>
+				<article>
+					<h1>node {{ .NodeName }}</h1>
+					<div><span class="label">Message</span><span class="value">{{ .NodeMessage }}</span></div>
+				</article>
+				<article>
+					<h1>command {{ .CommandName }}</h1>
+					<div><span class="label">Message</span><span class="value">{{ .CommandMessage }}</span></div>
+					<div><span class="label">command line</span><span class="value">{{ .CommandLine }}</span></div>
+				</article>
+		States         []int64
+		Notifiers      []notifier
+		Notifications  []notification
+			{{ end }}
+		</content>
+		{{ template "checkformfooter" . }}
+		{{ template "footer" . }}`,
+	}
+	Static = map[string]string{
+		"icon-mute": `<?xml version="1.0" encoding="UTF-8"?><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 35.3 35.3" version="1.1"><title>Check is muted</title><style>.s0{fill:#191919;}</style><g transform="translate(0,-261.72223)"><path d="m17.6 261.7v35.3L5.3 284.7H0v-10.6l5.3 0zM30.2 273.1l-3.7 3.7-3.7-3.7-2.5 2.5 3.7 3.7-3.7 3.7 2.5 2.5 3.7-3.7 3.7 3.7 2.5-2.5-3.7-3.7 3.7-3.7z" fill="#191919"/></g></svg>`,
+		"error":     `{{ template "header" . }}{{ template "footer" . }}`,
 	}
 	TmplUnhandledGroups = `TODO`
 	Funcs               = template.FuncMap{
 		"sub":  func(base, amount int) int { return base - amount },
 		"in":   func(t time.Time) time.Duration { return t.Sub(time.Now()).Round(1 * time.Second) },
 		"now":  func() time.Time { return time.Now() },
+		"join": func(args []string, c string) string { return strings.Join(args, c) },
 	}
 )