Implemented the logging viewer

Admin/Scheme/LoggingViewer.go

@@ -16,6 +16,9 @@ type LoggingViewer struct {
 	CurrentMessageName string
 	CurrentSender      string
 	CurrentPage        string
+	NextPage           string
+	PreviousPage       string
+	LastPage           string
 	MessageNames       []MessageNames
 	Sender             []Sender
 	Events             []LogEvent

Admin/Templates/LoggingViewer.go

@@ -46,7 +46,9 @@ var LoggingViewer string = `
         <h2 class="headercontrol">Filtering</h2>
         <div class="filters">
           <div class="w-form">
-            <form class="filterformcontainer" id="wf-form-Filters" name="wf-form-Filters" data-name="Filters">
+            <form class="filterformcontainer" id="wf-form-Filters" name="wf-form-Filters" data-name="Filters" method="post" action="/log">
+              <input type="hidden" name="LiveView" value="{{.SetLiveView}}">  
+              <input type="hidden" name="CurrentPage" value="{{.CurrentPage}}">  
               <div class="w-row">
                 <div class="w-col w-col-6">
                   <div class="columns">
@@ -144,13 +146,23 @@ var LoggingViewer string = `
       {{end}}
     </ul>
   </div>
-  <div class="w-container pagecontainer"><a class="button changepagebutton" href="#">First</a><a class="button changepagebutton" href="#">-1</a>
+  <div class="w-container pagecontainer">
+    <a class="button changepagebutton" href="/log?Level={{.CurrentLevel}}&TimeRange={{.CurrentTimeRange}}&Category={{.CurrentCategory}}&Impact={{.CurrentImpact}}&Severity={{.CurrentSeverity}}&MSGName={{.CurrentMessageName}}&Sender={{.CurrentSender}}&CurrentPage=1&LiveView={{.SetLiveView}}">First</a>
+    <a class="button changepagebutton" href="/log?Level={{.CurrentLevel}}&TimeRange={{.CurrentTimeRange}}&Category={{.CurrentCategory}}&Impact={{.CurrentImpact}}&Severity={{.CurrentSeverity}}&MSGName={{.CurrentMessageName}}&Sender={{.CurrentSender}}&CurrentPage={{.PreviousPage}}&LiveView={{.SetLiveView}}">-1</a>
     <div class="w-hidden-main w-hidden-medium newlineblock"></div>
     <div class="w-form formpageswrapper">
-      <form class="formpages" id="wf-form-Pages" name="wf-form-Pages" data-name="Pages" method="post">
+      <form class="formpages" id="wf-form-Pages" name="wf-form-Pages" data-name="Pages" method="post" action="/log">
+        <input type="hidden" name="Level" value="{{.CurrentLevel}}">  
+        <input type="hidden" name="TimeRange" value="{{.CurrentTimeRange}}">  
+        <input type="hidden" name="Category" value="{{.CurrentCategory}}">  
+        <input type="hidden" name="Impact" value="{{.CurrentImpact}}">  
+        <input type="hidden" name="Severity" value="{{.CurrentSeverity}}">  
+        <input type="hidden" name="MSGName" value="{{.CurrentMessageName}}">  
+        <input type="hidden" name="Sender" value="{{.CurrentSender}}">
+        <input type="hidden" name="LiveView" value="{{.SetLiveView}}">
         <label class="formfield" for="CurrentPage">Page</label>
-        <input class="w-input currentpage" id="CurrentPage" type="text" placeholder="1" name="CurrentPage" required="required" data-name="CurrentPage">
+        <input class="w-input currentpage" id="CurrentPage" type="text" placeholder="{{.CurrentPage}}" name="CurrentPage" required="required" data-name="CurrentPage">
-        <div class="textcountpages">of 1000 pages</div>
+        <div class="textcountpages">of {{.LastPage}} pages</div>
         <div class="w-hidden-main w-hidden-medium w-hidden-small newlineblock"></div>
         <input class="w-button button changepagebutton pagechangesubmit" type="submit" value="Change page" data-wait="Please wait...">
       </form>
@@ -161,7 +173,9 @@ var LoggingViewer string = `
         <p>Oops! Something went wrong while submitting the form :(</p>
       </div>
     </div>
-    <div class="w-hidden-main w-hidden-medium newlineblock"></div><a class="button changepagebutton" href="#">+1</a><a class="button changepagebutton" href="#">Last</a>
+    <div class="w-hidden-main w-hidden-medium newlineblock"></div>
+    <a class="button changepagebutton" href="/log?Level={{.CurrentLevel}}&TimeRange={{.CurrentTimeRange}}&Category={{.CurrentCategory}}&Impact={{.CurrentImpact}}&Severity={{.CurrentSeverity}}&MSGName={{.CurrentMessageName}}&Sender={{.CurrentSender}}&CurrentPage={{.NextPage}}&LiveView={{.SetLiveView}}">+1</a>
+    <a class="button changepagebutton" href="/log?Level={{.CurrentLevel}}&TimeRange={{.CurrentTimeRange}}&Category={{.CurrentCategory}}&Impact={{.CurrentImpact}}&Severity={{.CurrentSeverity}}&MSGName={{.CurrentMessageName}}&Sender={{.CurrentSender}}&CurrentPage={{.LastPage}}&LiveView={{.SetLiveView}}">Last</a>
   </div>
   <script type="text/javascript" src="/admin/js/jquery.min.js"></script>
   <script type="text/javascript" src="/admin/js/webflow.js"></script>

Log/Web/HandlerLog.go

@@ -1,6 +1,7 @@
 package Web
 
 import (
+	"fmt"
 	"github.com/SommerEngineering/Ocean/Admin"
 	"github.com/SommerEngineering/Ocean/Admin/Scheme"
 	"github.com/SommerEngineering/Ocean/Log"
@@ -9,6 +10,7 @@ import (
 	"github.com/SommerEngineering/Ocean/MimeTypes"
 	"github.com/SommerEngineering/Ocean/Shutdown"
 	"net/http"
+	"strconv"
 	"strings"
 )
 
@@ -25,6 +27,12 @@ func HandlerWebLog(response http.ResponseWriter, request *http.Request) {
 	request.ParseForm()
 	countParameters := len(request.Form)
 
+	// The current page as number:
+	currentPageNumber := 1
+
+	// The max. page as number:
+	lastPageNumber := 1
+
 	// Setup the data for the HTML template:
 	data := Scheme.LoggingViewer{}
 	data.Title = `Logging Viewer`
@@ -36,6 +44,15 @@ func HandlerWebLog(response http.ResponseWriter, request *http.Request) {
 		// Initial view => first page (latest logs)
 		data.Events = readLatest()
 		data.SetLiveView = true
+		data.CurrentPage = `1`
+		data.LastPage = fmt.Sprintf("%d", lastPageNumber)
+		if currentPageNumber+1 > lastPageNumber {
+			data.NextPage = fmt.Sprintf("%d", lastPageNumber)
+		} else {
+			data.NextPage = `2`
+		}
+
+		data.PreviousPage = `1`
 	} else {
 		// Case: Custom view
 		currentLevel := request.FormValue(`Level`)
@@ -98,9 +115,34 @@ func HandlerWebLog(response http.ResponseWriter, request *http.Request) {
 		}
 
 		if currentPage != `` {
+			if number, err := strconv.Atoi(currentPage); err != nil {
+				Log.LogFull(senderName, LM.CategorySYSTEM, LM.LevelERROR, LM.SeverityNone, LM.ImpactNone, LM.MessageNameEXECUTE, `Was not able to parse the page number.`, err.Error())
+			} else {
+				currentPageNumber = number
+				data.CurrentPage = fmt.Sprintf("%d", currentPageNumber)
+				data.LastPage = fmt.Sprintf("%d", lastPageNumber)
+				if currentPageNumber+1 > lastPageNumber {
+					data.NextPage = fmt.Sprintf("%d", lastPageNumber)
+				} else {
+					data.NextPage = fmt.Sprintf("%d", currentPageNumber+1)
+				}
+
+				if currentPageNumber > 1 {
+					data.PreviousPage = fmt.Sprintf("%d", currentPageNumber-1)
+				} else {
+					data.PreviousPage = `1`
+				}
+			}
 			data.CurrentPage = currentPage
 		} else {
-			data.CurrentPage = `*`
+			data.CurrentPage = `1`
+			data.LastPage = fmt.Sprintf("%d", lastPageNumber)
+			if currentPageNumber+1 > lastPageNumber {
+				data.NextPage = fmt.Sprintf("%d", lastPageNumber)
+			} else {
+				data.NextPage = `2`
+			}
+			data.PreviousPage = `1`
 		}
 	}