feat: add configurability to frontend plot zoom

pkg/schema/config.go

@@ -76,6 +76,13 @@ type Retention struct {
 	IncludeDB bool   `json:"includeDB"`
 }
 
+type ResampleConfig struct {
+	// Trigger next zoom level at less than this many visible datapoints
+	Trigger int `json:"trigger"`
+	// Array of resampling target resolutions, in seconds; Example: [600,300,60]
+	Resolutions []int `json:"resolutions"`
+}
+
 // Format of the configuration (file). See below for the defaults.
 type ProgramConfig struct {
 	// Address where the http (or https) server will listen on (for example: 'localhost:80').
@@ -133,6 +140,9 @@ type ProgramConfig struct {
 	// be provided! Most options here can be overwritten by the user.
 	UiDefaults map[string]interface{} `json:"ui-defaults"`
 
+	// If exists, will enable dynamic zoom in frontend metric plots using the configured values
+	EnableResampling *ResampleConfig `json:"enable-resampling"`
+
 	// Where to store MachineState files
 	MachineStateDir string `json:"machine-state-dir"`
 

pkg/schema/schemas/config.schema.json

@@ -424,6 +424,27 @@
                 "plot_general_colorscheme",
                 "plot_list_selectedMetrics"
             ]
+        },
+        "enable-resampling": {
+            "description": "Enable dynamic zoom in frontend metric plots.",
+            "type": "object",
+            "properties": {
+                "trigger": {
+                    "description": "Trigger next zoom level at less than this many visible datapoints.",
+                    "type": "integer"
+                },
+                "resolutions": {
+                    "description": "Array of resampling target resolutions, in seconds.",
+                    "type": "array",
+                    "items": {
+                        "type": "integer"
+                    }
+                }
+            },
+            "required": [
+                "trigger",
+                "resolutions"
+            ]
         }
     },
     "required": [