move all logic out of main, write metrics support, initial work into querying previous metrics

Author: Ted Pearson

go.mod

@@ -5,16 +5,21 @@ go 1.19
 require (
 	github.com/chromedp/cdproto v0.0.0-20220924210414-0e3390be1777
 	github.com/chromedp/chromedp v0.8.6
+	github.com/influxdata/influxdb-client-go/v2 v2.11.0
 	github.com/shopspring/decimal v1.3.1
 	gopkg.in/yaml.v3 v3.0.1
 )
 
 require (
 	github.com/chromedp/sysutil v1.0.0 // indirect
+	github.com/deepmap/oapi-codegen v1.8.2 // indirect
 	github.com/gobwas/httphead v0.1.0 // indirect
 	github.com/gobwas/pool v0.2.1 // indirect
 	github.com/gobwas/ws v1.1.0 // indirect
+	github.com/influxdata/line-protocol v0.0.0-20200327222509-2487e7298839 // indirect
 	github.com/josharian/intern v1.0.0 // indirect
 	github.com/mailru/easyjson v0.7.7 // indirect
+	github.com/pkg/errors v0.9.1 // indirect
+	golang.org/x/net v0.0.0-20210119194325-5f4716e94777 // indirect
 	golang.org/x/sys v0.0.0-20220928140112-f11e5e49a4ec // indirect
 )

go.sum

@@ -4,24 +4,105 @@ github.com/chromedp/chromedp v0.8.6 h1:KobeeqR2dpfKSG1prS3Y6+FbffMmGC6xmAobRXA9Q
 github.com/chromedp/chromedp v0.8.6/go.mod h1:nBYHoD6YSNzrr82cIeuOzhw1Jo/s2o0QQ+ifTeoCZ+c=
 github.com/chromedp/sysutil v1.0.0 h1:+ZxhTpfpZlmchB58ih/LBHX52ky7w2VhQVKQMucy3Ic=
 github.com/chromedp/sysutil v1.0.0/go.mod h1:kgWmDdq8fTzXYcKIBqIYvRRTnYb9aNS9moAV0xufSww=
+github.com/cyberdelia/templates v0.0.0-20141128023046-ca7fffd4298c/go.mod h1:GyV+0YP4qX0UQ7r2MoYZ+AvYDp12OF5yg4q8rGnyNh4=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/deepmap/oapi-codegen v1.8.2 h1:SegyeYGcdi0jLLrpbCMoJxnUUn8GBXHsvr4rbzjuhfU=
+github.com/deepmap/oapi-codegen v1.8.2/go.mod h1:YLgSKSDv/bZQB7N4ws6luhozi3cEdRktEqrX88CvjIw=
+github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZmtrrCbhqsmaPHjLKYnJCaQ=
+github.com/getkin/kin-openapi v0.61.0/go.mod h1:7Yn5whZr5kJi6t+kShccXS8ae1APpYTW6yheSwk8Yi4=
+github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
+github.com/go-chi/chi/v5 v5.0.0/go.mod h1:BBug9lr0cqtdAhsu6R4AAdvufI0/XBzAQSsUqJpoZOs=
+github.com/go-openapi/jsonpointer v0.19.5/go.mod h1:Pl9vOtqEWErmShwVjC8pYs9cog34VGT37dQOVbmoatg=
+github.com/go-openapi/swag v0.19.5/go.mod h1:POnQmlKehdgb5mhVOsnJFsivZCEZ/vjK9gh66Z9tfKk=
 github.com/gobwas/httphead v0.1.0 h1:exrUm0f4YX0L7EBwZHuCF4GDp8aJfVeBrlLQrs6NqWU=
 github.com/gobwas/httphead v0.1.0/go.mod h1:O/RXo79gxV8G+RqlR/otEwx4Q36zl9rqC5u12GKvMCM=
 github.com/gobwas/pool v0.2.1 h1:xfeeEhW7pwmX8nuLVlqbzVc7udMDrwetjEv+TZIz1og=
 github.com/gobwas/pool v0.2.1/go.mod h1:q8bcK0KcYlCgd9e7WYLm9LpyS+YeLd8JVDW6WezmKEw=
 github.com/gobwas/ws v1.1.0 h1:7RFti/xnNkMJnrK7D1yQ/iCIB5OrrY/54/H930kIbHA=
 github.com/gobwas/ws v1.1.0/go.mod h1:nzvNcVha5eUziGrbxFCo6qFIojQHjJV5cLYIbezhfL0=
+github.com/golangci/lint-1 v0.0.0-20181222135242-d2cdd8c08219/go.mod h1:/X8TswGSh1pIozq4ZwCfxS0WA5JGXguxk94ar/4c87Y=
+github.com/gorilla/mux v1.8.0/go.mod h1:DVbg23sWSpFRCP0SfiEN6jmj59UnW/n46BH5rLB71So=
+github.com/influxdata/influxdb-client-go/v2 v2.11.0 h1:BrHYv38rWkAnp22gIaHFp5LpOCazOqRMRvVE1yW3ym8=
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+github.com/influxdata/line-protocol v0.0.0-20200327222509-2487e7298839 h1:W9WBk7wlPfJLvMCdtV4zPulc4uCPrlywQOmbFOhgQNU=
+github.com/influxdata/line-protocol v0.0.0-20200327222509-2487e7298839/go.mod h1:xaLFMmpvUxqXtVkUJfg9QmT88cDaCJ3ZKgdZ78oO8Qo=
 github.com/josharian/intern v1.0.0 h1:vlS4z54oSdjm0bgjRigI+G1HpF+tI+9rE5LLzOg8HmY=
 github.com/josharian/intern v1.0.0/go.mod h1:5DoeVV0s6jJacbCEi61lwdGj/aVlrQvzHFFd8Hwg//Y=
+github.com/kr/pretty v0.1.0 h1:L/CwN0zerZDmRFUapSPitk6f+Q3+0za1rQkzVuMiMFI=
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+golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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 golang.org/x/sys v0.0.0-20201207223542-d4d67f95c62d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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 golang.org/x/sys v0.0.0-20220928140112-f11e5e49a4ec h1:BkDtF2Ih9xZ7le9ndzTA7KJow28VbQW3odyk/8drmuI=
 golang.org/x/sys v0.0.0-20220928140112-f11e5e49a4ec/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
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 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
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internal/app/browser.go

@@ -10,20 +10,13 @@ import (
 	"github.com/chromedp/chromedp"
 )
 
-type Config struct {
-	Username    string
-	Password    string
-	LoginUrl    string
-	DownloadDir string
-}
-
 func DownloadCsv(config *Config, startDate string, endDate string) (string, error) {
 	allocatorFlags := append(chromedp.DefaultExecAllocatorOptions[:], chromedp.Flag("headless", false))
 	ctx, cancel := chromedp.NewExecAllocator(context.Background(), allocatorFlags...)
 	defer cancel()
 	ctx, cancel = chromedp.NewContext(ctx, chromedp.WithLogf(log.Printf))
 	defer cancel()
-	ctx, cancel = context.WithTimeout(ctx, 15*time.Second)
+	ctx, cancel = context.WithTimeout(ctx, 30*time.Second)
 	defer cancel()
 
 	done := make(chan string, 1)

internal/app/main.go

@@ -0,0 +1,56 @@
+package app
+
+import (
+	"fmt"
+	"log"
+	"os"
+
+	"gopkg.in/yaml.v3"
+)
+
+var (
+	startDate = "09/29/2022"
+	endDate   = "09/30/2022"
+)
+
+type InfluxDB struct {
+	Host     string
+	User     string
+	Password string
+	Database string
+}
+
+type Config struct {
+	Username    string
+	Password    string
+	LoginUrl    string
+	DownloadDir string
+	InfluxDB    InfluxDB
+}
+
+func Main() {
+
+	// read config
+	file, err := os.ReadFile("config.yaml")
+	if err != nil {
+		log.Fatal(err)
+	}
+	config := &Config{}
+	err = yaml.Unmarshal(file, config)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	path, err := DownloadCsv(config, startDate, endDate)
+	if err != nil {
+		log.Fatal(err)
+	}
+	fmt.Printf("file downloaded: %s", path)
+	// parse csv!
+	records, err := ParseCsv(path)
+	if err != nil {
+		log.Fatal(err)
+	}
+	fmt.Printf("%+v", records)
+	WriteMetrics(records, config.InfluxDB)
+}

internal/app/metrics.go

@@ -0,0 +1,94 @@
+package app
+
+import (
+	"context"
+	"encoding/json"
+	"log"
+	"net/http"
+	"net/url"
+	"strings"
+	"time"
+
+	"github.com/influxdata/influxdb-client-go/v2"
+	"github.com/influxdata/influxdb-client-go/v2/api/write"
+)
+
+//type Metric struct {
+//	Name string `json:"__name__"`
+//	Db   string
+//}
+
+type MetricLine struct {
+	//Metric     Metric
+	//Values     []float64
+	Timestamps []int64
+}
+
+func WriteMetrics(records []*ElectricUsage, config InfluxDB) {
+	client := influxdb2.NewClient(config.Host, config.User+":"+config.Password)
+	writeApi := client.WriteAPIBlocking("", config.Database)
+	points := make([]*write.Point, 0, 15*2*len(records))
+	for _, record := range records {
+		divisor := record.EndTime.Sub(record.StartTime).Minutes()
+		for t := record.StartTime; record.EndTime.After(t); t = t.Add(time.Minute) {
+			watts := influxdb2.NewPointWithMeasurement("electric").
+				SetTime(t).
+				AddField("usage", float64(record.WattHours)/divisor)
+			cost := influxdb2.NewPointWithMeasurement("electric").
+				SetTime(t).
+				AddField("cost", float64(record.CostInCents)/divisor)
+			points = append(points, watts, cost)
+		}
+	}
+
+	err := writeApi.WritePoint(context.Background(), points...)
+	if err != nil {
+		log.Fatal(err)
+	}
+	// query VM for metrics that already exist in the range we're trying to insert?
+	// if that's too much work, then just maintain last-inserted-time and don't insert newer
+	log.Println(points)
+}
+
+// the goal here is to not double write any metrics
+// therefore, we should simply filter inserted points by any points that
+// already exist.
+// the algorithm for that is to run this query first, making a map[time]struct{}
+// and discarding any point in WriteMetrics that exists in the map.
+
+func QueryPreviousMetrics(startTime time.Time, endTime time.Time, config InfluxDB) map[int64]struct{} {
+	client := &http.Client{}
+	v := url.Values{
+		"match[]": {"sensor_temperature"},
+		"start":   {startTime.Format("2006-01-02T15:04:05+07:00")},
+		"end":     {endTime.Format("2006-01-02T15:04:05+07:00")},
+	}
+	req, err := http.NewRequest("POST", config.Host+"/api/v1/export", strings.NewReader(v.Encode()))
+	if err != nil {
+		log.Fatal(err)
+	}
+	req.Header.Add("Content-Type", "application/x-www-form-urlencoded")
+	req.SetBasicAuth(config.User, config.Password)
+	resp, err := client.Do(req)
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer func() {
+		err := resp.Body.Close()
+		if err != nil {
+			log.Fatal(err)
+		}
+	}()
+	existing := make(map[int64]struct{})
+	decoder := json.NewDecoder(resp.Body)
+	for decoder.More() {
+		var line MetricLine
+		if err := decoder.Decode(&line); err != nil {
+			log.Printf("Bad line: %w\n", err)
+		}
+		for _, ts := range line.Timestamps {
+			existing[ts] = struct{}{}
+		}
+	}
+	return existing
+}

internal/app/parser.go

@@ -18,11 +18,7 @@ type ElectricUsage struct {
 	CostInCents int64
 }
 
-type ElectricRecords struct {
-	ElectricUsage []*ElectricUsage
-}
-
-func ParseCsv(file string) (*ElectricRecords, error) {
+func ParseCsv(file string) ([]*ElectricUsage, error) {
 	dateRegex, err := regexp.Compile(`(\d{4}-\d\d-\d\d \d\d:\d\d) to (\d{4}-\d\d-\d\d \d\d:\d\d)`)
 	if err != nil {
 		log.Fatal(err)
@@ -49,7 +45,7 @@ func ParseCsv(file string) (*ElectricRecords, error) {
 			records = append(records, usage)
 		}
 	}
-	return &ElectricRecords{records}, nil
+	return records, nil
 }
 
 func parseRecord(row []string, dates []string) *ElectricUsage {

main.go

@@ -1,41 +1,9 @@
 package main
 
 import (
-	"fmt"
-	"log"
-	"os"
-
-	"gopkg.in/yaml.v3"
-
 	"electric-usage-downloader/internal/app"
 )
 
-var (
-	startDate = "09/29/2022"
-	endDate   = "09/30/2022"
-)
-
 func main() {
-	// read config
-	file, err := os.ReadFile("config.yaml")
-	if err != nil {
-		log.Fatal(err)
-	}
-	config := &app.Config{}
-	err = yaml.Unmarshal(file, config)
-	if err != nil {
-		log.Fatal(err)
-	}
-
-	path, err := app.DownloadCsv(config, startDate, endDate)
-	if err != nil {
-		log.Fatal(err)
-	}
-	fmt.Printf("file downloaded: %s", path)
-	// parse csv!
-	records, err := app.ParseCsv(path)
-	if err != nil {
-		log.Fatal(err)
-	}
-	fmt.Printf("%+v", records)
+	app.Main()
 }