Added support for dial box

client/src/api/sensorValues.ts

@@ -19,3 +19,16 @@ export const getSensorValues = ({
 			from.getTime() / 1000
 		)}&to=${Math.round(to.getTime() / 1000)}`
 	)
+
+export const getLatestSensorValue = ({
+	to,
+	sensor,
+}: {
+	to: Date
+	sensor: string
+}) =>
+	request<SensorValue>(
+		`/api/sensors/${encodeURI(sensor)}/values/latest?to=${Math.round(
+			to.getTime() / 1000
+		)}`
+	)

client/src/assets/style.css

@@ -214,6 +214,8 @@ form.horizontal .input label {
 
 .grid-sensors .grid-box .box {
 	position: relative;
+	display: flex;
+	flex-direction: column;
 }
 
 .grid-sensors .grid-box .box .resize-h {
@@ -245,6 +247,8 @@ form.horizontal .input label {
 
 .grid-sensors .grid-box .box .header {
 	display: flex;
+	flex-grow: 0;
+	flex-shrink: 0;
 }
 
 .grid-sensors .grid-box .box .header .drag-handle {
@@ -256,6 +260,19 @@ form.horizontal .input label {
 	margin-left: auto;
 }
 
+.grid-sensors .grid-box .box .body {
+	flex: 1;
+}
+
+.grid-sensors .grid-box .box .dial {
+	text-align: center;
+	font-size: 150%;
+	display: flex;
+	align-items: center;
+	justify-content: center;
+	height: 100%;
+}
+
 .grid-sensors .box-preview {
 	position: absolute;
 	background-color: #3988FF;

client/src/pages/dashboard/NewDashboardPage.tsx

@@ -59,8 +59,7 @@ export const NewDashboardPage = () => {
 			return b
 		})
 
-		setBoxes([box, ...otherBoxes])
+		handleChange(() => [box, ...otherBoxes])
-		// TODO: Save
 	}
 
 	// Terrible code - ensure there's default dashboard

client/src/pages/dashboard/components/BoxDialContent.tsx

@@ -0,0 +1,34 @@
+import { getLatestSensorValue } from '@/api/sensorValues'
+import { DashboardDialData } from '@/utils/parseDashboard'
+import { useQuery } from 'react-query'
+import { useDashboardContext } from '../contexts/DashboardContext'
+import { BoxDefinition } from '../types'
+
+type Props = {
+	box: BoxDefinition
+	data: DashboardDialData
+}
+
+export const BoxDialContent = ({ box, data }: Props) => {
+	const { filter } = useDashboardContext()
+
+	const valuesQuery = {
+		sensor: box.sensor ?? '-1',
+		to: filter.customTo,
+	}
+
+	const value = useQuery(['/sensor/values/latest', valuesQuery], () =>
+		getLatestSensorValue(valuesQuery)
+	)
+
+	return (
+		<div className="dial">
+			{value.data && (
+				<>
+					{value.data.value}
+					{data.unit}
+				</>
+			)}
+		</div>
+	)
+}

client/src/pages/dashboard/components/BoxSettings/BoxSettings.tsx

@@ -1,7 +1,9 @@
 import { getSensors } from '@/api/sensors'
+import { DashboardDialData, DashboardGraphData } from '@/utils/parseDashboard'
 import { useState } from 'preact/hooks'
 import { useQuery } from 'react-query'
 import { BoxDefinition } from '../../types'
+import { DialSettings } from './components/DialSettings'
 import { GraphSettings } from './components/GraphSettings'
 
 type Props = {
@@ -88,11 +90,22 @@ export const BoxSettings = ({ value, onSave, onClose }: Props) => {
 								onChange={handleChange}
 							>
 								<option value="graph">Graph</option>
+								<option value="dial">Dial</option>
 							</select>
 						</div>
 
 						{formState.type === 'graph' && (
-							<GraphSettings value={data} onChange={setData} />
+							<GraphSettings
+								value={data as DashboardGraphData}
+								onChange={setData}
+							/>
+						)}
+
+						{formState.type === 'dial' && (
+							<DialSettings
+								value={data as DashboardDialData}
+								onChange={setData}
+							/>
 						)}
 
 						<div className="actions">

client/src/pages/dashboard/components/BoxSettings/components/DialSettings.tsx

@@ -0,0 +1,33 @@
+import { DashboardDialData } from '@/utils/parseDashboard'
+import { useEffect, useState } from 'preact/hooks'
+
+type Props = {
+	value?: DashboardDialData
+	onChange: (data: DashboardDialData) => void
+}
+
+export const DialSettings = ({ value, onChange }: Props) => {
+	const [formState, setFormState] = useState(() => ({ unit: value?.unit }))
+
+	const handleChange = (e: Event) => {
+		const target = e.target as HTMLSelectElement | HTMLInputElement
+
+		setFormState({
+			...formState,
+			[target.name]: target.value,
+		})
+	}
+
+	useEffect(() => {
+		onChange({ ...formState, type: 'dial' })
+	}, [formState])
+
+	return (
+		<>
+			<div className="input">
+				<label>Unit</label>
+				<input name="unit" value={formState.unit} onChange={handleChange} />
+			</div>
+		</>
+	)
+}

client/src/pages/dashboard/components/EditableBox.tsx

@@ -5,6 +5,7 @@ import { useDashboardContext } from '../contexts/DashboardContext'
 import { useDragging } from '../hooks/useDragging'
 import { ResizingMode, useResize } from '../hooks/useResize'
 import { BoxDefinition } from '../types'
+import { BoxDialContent } from './BoxDialContent'
 import { BoxGraphContent } from './BoxGraphContent'
 import { BoxSettings } from './BoxSettings/BoxSettings'
 
@@ -129,6 +130,9 @@ export const EditableBox = ({
 						{box.sensor && box.data?.type === 'graph' && (
 							<BoxGraphContent box={box} data={box.data} />
 						)}
+						{box.sensor && box.data?.type === 'dial' && (
+							<BoxDialContent box={box} data={box.data} />
+						)}
 					</div>
 
 					<div

client/src/pages/dashboard/hooks/useDragging.ts

@@ -24,7 +24,7 @@ export const useDragging = ({ cellWidth, boxes, box }: Props) => {
 		Math.min(GRID_WIDTH - box.w, Math.round(state.x / cellWidth))
 	)
 
-	const dragY = Math.round(state.y / GRID_H_SNAP) * GRID_H_SNAP
+	const dragY = Math.max(0, Math.round(state.y / GRID_H_SNAP) * GRID_H_SNAP)
 
 	const gridHeights = Array(GRID_WIDTH)
 		.fill(null)

client/src/utils/parseDashboard.ts

@@ -11,7 +11,7 @@ export type DashboardContentBox = {
 	h: number
 	sensor?: string
 	title?: string
-	data?: DashboardGraphData
+	data?: DashboardGraphData | DashboardDialData
 }
 
 export type DashboardGraphData = {
@@ -22,6 +22,11 @@ export type DashboardGraphData = {
 	graphType?: string
 }
 
+export type DashboardDialData = {
+	type: 'dial'
+	unit?: string
+}
+
 export const parseDashboard = (input: string) => {
 	return JSON.parse(input) as DashboardContent
 }

server/routes/sensor_values.go

@@ -11,11 +11,15 @@ type postSensorValueBody struct {
 	Value float64 `json:"value"`
 }
 
-type getSensorQuery struct {
+type getSensorValuesQuery struct {
 	From int64 `form:"from"`
 	To   int64 `form:"to"`
 }
 
+type getLatestSensorValueQuery struct {
+	To int64 `form:"to"`
+}
+
 func PostSensorValues(s *app.Server) gin.HandlerFunc {
 	return func(c *gin.Context) {
 		var newValue postSensorValueBody
@@ -37,7 +41,7 @@ func PostSensorValues(s *app.Server) gin.HandlerFunc {
 
 func GetSensorValues(s *app.Server) gin.HandlerFunc {
 	return func(c *gin.Context) {
-		var query getSensorQuery
+		var query getSensorValuesQuery
 
 		sensor := c.Param("sensor")
 
@@ -58,7 +62,7 @@ func GetSensorValues(s *app.Server) gin.HandlerFunc {
 
 func GetSensorLatestValue(s *app.Server) gin.HandlerFunc {
 	return func(c *gin.Context) {
-		var query getSensorQuery
+		var query getLatestSensorValueQuery
 
 		sensor := c.Param("sensor")
 
@@ -67,7 +71,7 @@ func GetSensorLatestValue(s *app.Server) gin.HandlerFunc {
 			return
 		}
 
-		value, err := s.Services.SensorValues.GetLatest(sensor, query.From, query.To)
+		value, err := s.Services.SensorValues.GetLatest(sensor, query.To)
 
 		if err != nil {
 			c.AbortWithError(500, err)

server/services/sensor_values_service.go

@@ -51,10 +51,10 @@ func (s *SensorValuesService) GetList(sensor string, from int64, to int64) ([]se
 	return values, nil
 }
 
-func (s *SensorValuesService) GetLatest(sensor string, from int64, to int64) (*sensorValue, error) {
+func (s *SensorValuesService) GetLatest(sensor string, to int64) (*sensorValue, error) {
 	var value = sensorValue{}
 
-	row := s.ctx.DB.QueryRow("SELECT timestamp, value FROM sensor_values WHERE sensor = ? AND timestamp > ? AND timestamp < ? ORDER BY timestamp DESC LIMIT 1", sensor, from, to)
+	row := s.ctx.DB.QueryRow("SELECT timestamp, value FROM sensor_values WHERE sensor = ? timestamp < ? ORDER BY timestamp DESC LIMIT 1", sensor, to)
 
 	err := row.Scan(&value.Timestamp, &value.Value)
 	if err != nil {