Added arm builds, improve database

- The program will now be cross-compiled and released for arm as well as x86
- What we previously called "cache" is not actually a cache, as it holds content that can't be always retrieved. Now we're stopping calling it a cache.
- Improved history merging
- Fixed the README to include the database as a volume, and to fix some errors

.woodpecker.yml

@@ -1,12 +1,6 @@
 pipeline:
 
-  build:
-    image: golang
-    commands:
-      - go get ecodash
-      - go build
-
-  docker-publish:
+  docker:
     image: plugins/docker
     settings:
       registry: gitea.massivebox.net
@@ -16,11 +10,19 @@ pipeline:
       password:
         from_secret: auth_token
 
+  build:
+    image: golang
+    commands:
+      - go get ecodash
+      - go build -o ecodash-x86
+      - env GOOS=linux GOARCH=arm go build -o ecodash-arm
+
   prepare-gitea-release:
     image: alpine
     commands:
       - apk update; apk add zip
-      - zip -r ecodash.zip templates ecodash
+      - mv ecodash-x86 ecodash; zip -r ecodash-x86.zip templates ecodash
+      - mv ecodash-arm ecodash; zip -r ecodash-arm.zip templates ecodash
     when:
       event: tag
 
@@ -28,7 +30,7 @@ pipeline:
     image: plugins/gitea-release
     settings:
       base_url: https://gitea.massivebox.net
-      files: ecodash.zip
+      files: ecodash-x86.zip ecodash-arm.zip
       api_key:
         from_secret: auth_token
       title: ${CI_COMMIT_TAG}

README.md

@@ -1,4 +1,5 @@
 # 🌿 EcoDash
+
 [![status-badge](https://woodpecker.massivebox.net/api/badges/massivebox/ecodash/status.svg)](https://woodpecker.massivebox.net/massivebox/ecodash)
 
 EcoDash is a simple way to show your users how much your server consumes.  
@@ -15,14 +16,17 @@ You can see it in action here: https://ecodash.massivebox.net
 ## Installation
 
 #### Using Docker run:
+
 ```
-touch config.json
-docker run -v ./config.json:/app/config.json --name ecodash -p 8080:80 gitea.massivebox.net/massivebox/ecodash 
+docker run -v /absolute_path_to/config.json:/app/config.json -v /absolute_path_to/database.db:/app/database.db --name ecodash -p 8080:80 gitea.massivebox.net/massivebox/ecodash 
 ```
+
 This will open the container on port 8080. Replace "8080" in the command with whatever number you want to open that specific port.
 
 #### Using Docker Compose:
+
 Create a file `docker-compose.yml` with the following content:
+
 ```
 version: '3'
 services:
@@ -33,17 +37,20 @@ services:
       - '8080:80'
     volumes:
       - ./config.json:/app/config.json
+      - ./database.db:/app/database.db
     restart: always
+```
+
+Run the container with
 
 ```
-Run the container with
-```
-touch config.json
 docker compose up -d
 ```
+
 This will open the container on port 8080. Replace "8080" in the file with whatever number you want to open that specific port.
 
 #### Using the binary
+
 Grab a binary from the Releases page and run it. You can use the `PORT` environment variable to override the default port (80).
 
 ## Set up
@@ -62,6 +69,7 @@ If you've just added your energy meter into HomeAssistant, note that it will tak
 ## Support
 
 If something isn't working, you can find some help here:
+
 - [Matrix support room](https://matrix.to/#/#support:massivebox.net)
 - [Issues page](./issues)
 - [Contact me](https://massivebox.net/contact.html)

api.go

@@ -126,7 +126,7 @@ func (config Config) historyBulkAverageAndConvertToGreen(entityID string, startT
 		}
 		value := float32(val)
 		var found bool
-		dayNo := historyChange.LastUpdated.Local().Day()
+		dayNo := dayStart(historyChange.LastUpdated.Local()).Day()
 		for key, day := range days {
 			if dayNo == day.DayNumber {
 				found = true
@@ -205,7 +205,7 @@ func (config Config) historyBulkDelta(entityID string, startTime, endTime time.T
 			}
 			value := float32(val)
 			var found bool
-			dayNo := historyChange.LastUpdated.Local().Day()
+			dayNo := dayStart(historyChange.LastUpdated.Local()).Day()
 			for key, day := range days {
 				if dayNo == day.DayNumber {
 					found = true

database.go

@@ -6,14 +6,14 @@ import (
 	"time"
 )
 
-type CacheEntry struct {
+type HistoryEntry struct {
 	Date                       int64
 	GreenEnergyPercentage      float32
 	PolledSmartEnergySummation float32
 }
-type CacheData []CacheEntry
+type History []HistoryEntry
 
-func (config Config) updateCache() {
+func (config Config) updateHistory() {
 
 	greenEnergyPercentage, err := config.historyAverageAndConvertToGreen(config.Sensors.FossilPercentage, time.Now())
 	if err != nil {
@@ -24,9 +24,9 @@ func (config Config) updateCache() {
 		return
 	}
 
-	config.db.Exec("INSERT INTO cache(time,green_energy_percentage,energy_consumption) VALUES (?,?,?);", dayStart(time.Now()).Unix(), greenEnergyPercentage.Value, historyPolledSmartEnergySummation.Value)
+	config.db.Exec("INSERT OR REPLACE INTO cache(time,green_energy_percentage,energy_consumption) VALUES (?,?,?);", dayStart(time.Now()).Unix(), greenEnergyPercentage.Value, historyPolledSmartEnergySummation.Value)
 
-	cached, err := config.readCache()
+	cached, err := config.readHistory()
 	if err != nil {
 		return
 	}
@@ -60,32 +60,40 @@ func (config Config) refreshCacheFromPast(pastTime time.Time) error {
 		return err
 	}
 
-	_, err = config.db.Exec("DELETE FROM cache")
-	if err != nil {
-		return err
-	}
-
 	for key, day := range greenEnergyPercentage {
-		_, err := config.db.Exec("INSERT INTO cache(time,green_energy_percentage,energy_consumption) VALUES (?,?,?);", day.DayTime.Unix(), greenEnergyPercentage[key].Value, historyPolledSmartEnergySummation[key].Value)
+
+		var action2 string
+		if greenEnergyPercentage[key].Value != 0 && historyPolledSmartEnergySummation[key].Value != 0 {
+			action2 = "REPLACE"
+		} else {
+			action2 = "IGNORE"
+		}
+
+		stmt, err := config.db.Prepare("INSERT OR " + action2 + " INTO cache(time, green_energy_percentage, energy_consumption) values(?,?,?)")
 		if err != nil {
 			return err
 		}
+		_, err = stmt.Exec(day.DayTime.Unix(), greenEnergyPercentage[key].Value, historyPolledSmartEnergySummation[key].Value)
+		if err != nil {
+			return err
+		}
+
 	}
 
 	return nil
 
 }
 
-func (config Config) readCache() (CacheData, error) {
+func (config Config) readHistory() (History, error) {
 
 	start := dayStart(time.Now()).AddDate(0, 0, -8)
 
 	rows, err := config.db.Query("SELECT time, green_energy_percentage, energy_consumption FROM cache WHERE time > ?", start.Unix())
 	if err != nil {
-		return CacheData{}, err
+		return History{}, err
 	}
 	defer rows.Close()
-	var ret CacheData
+	var ret History
 
 	for rows.Next() {
 		var (
@@ -94,7 +102,7 @@ func (config Config) readCache() (CacheData, error) {
 			polledSmartEnergyConsumption float32
 		)
 		err = rows.Scan(&date, &greenEnergyPercentage, &polledSmartEnergyConsumption)
-		ret = append(ret, CacheEntry{date, greenEnergyPercentage, polledSmartEnergyConsumption})
+		ret = append(ret, HistoryEntry{date, greenEnergyPercentage, polledSmartEnergyConsumption})
 	}
 
 	return ret, nil

http.go

@@ -177,7 +177,7 @@ func (config Config) renderIndex(c *fiber.Ctx) error {
 		}, "base")
 	}
 
-	data, err := config.readCache()
+	data, err := config.readHistory()
 	if err != nil {
 		return err
 	}

main.go

@@ -18,12 +18,12 @@ func main() {
 
 	if !isFirstRun {
 		cr := cron.New()
-		_, err = cr.AddFunc("@hourly", config.updateCache)
+		_, err = cr.AddFunc("@hourly", config.updateHistory)
 		if err != nil {
 			log.Fatal(err)
 		}
 		cr.Start()
-		config.updateCache()
+		config.updateHistory()
 	}
 
 	engine := html.New("./templates/"+config.Dashboard.Theme, ".html")