feat: add possibility to hide upload button (#25)

I was asked to add the possibility to hide the upload button to avoid users confuse this tool for a file sharing app.
This is only on the front.

No breaking changes, by default the button is displayed.

Co-authored-by: Thibault Piron <thibault.a.piron@gmail.com>
Reviewed-on: #25
Reviewed-by: Julien Riou <jriou@monitoring@riou.xyz>
Co-authored-by: tapiron <tapiron@monitoring@riou.xyz>
Co-committed-by: tapiron <tapiron@monitoring@riou.xyz>

src/cmd/collerd/README.md

@@ -33,6 +33,7 @@ The file format is **JSON**:
 * **observation_internal** (int): Number of seconds to wait between two observations (default 60)
 * **languages** ([]string): List of supported [languages](https://github.com/microsoft/monaco-editor/tree/main/src/basic-languages)
 * **language** (string): Default language (default "text")
+* **enable_upload_file_button** (bool): Display the upload file button in the UI (default true)
 
 The configuration file is not required but the service might not be exposed to the public.
 

src/server/config.go

@@ -25,6 +25,7 @@ type Config struct {
 	ObservationInterval    int      `json:"observation_internal"`
 	Languages              []string `json:"languages"`
 	Language               string   `json:"language"`
+	EnableUploadFileButton bool     `json:"enable_upload_file_button"`
 }
 
 func NewConfig() *Config {
@@ -70,6 +71,7 @@ func NewConfig() *Config {
 			"YAML",
 		},
 		Language:               "text",
+		EnableUploadFileButton: true,
 	}
 }
 

src/server/server.go

@@ -194,6 +194,7 @@ type PageData struct {
 	Err                    error
 	URL                    string
 	Note                   *Note
+	EnableUploadFileButton bool
 }
 
 type HomeHandler struct {
@@ -431,6 +432,7 @@ func (s *Server) Start() error {
 	if s.config.ShowVersion {
 		p.Version = s.version
 	}
+	p.EnableUploadFileButton = s.config.EnableUploadFileButton
 
 	templates, err := template.New("templates").Funcs(funcs).ParseFS(templatesFS, "templates/*.html")
 	if err != nil {

src/server/templates/index.html

@@ -31,9 +31,11 @@
                         value="delete-after-read" name="delete-after-read">
                     <label class="col-form-label col-form-label-sm" for="delete-after-read">Delete after read</label>
                 </div>
+                {{if .EnableUploadFileButton}}
                 <div class="col">
                     <input type="file" class="form-control" for="file" id="file" name="file" accept="text/plain" />
                 </div>
+                {{end}}
                 <div class="col">
                     <select class="form-select" aria-label="Expiration" id="expiration" name="expiration">
                         <option disabled>Expiration</option>