140 lines
2.9 KiB
Go
140 lines
2.9 KiB
Go
// Copyright (c) 2024 Zeni Kim <zenik@smarteching.com>
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// Use of this source code is governed by MIT-style
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// license that can be found in the LICENSE file.
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package core
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import (
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"fmt"
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"net/http"
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"strconv"
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"strings"
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"git.smarteching.com/zeni/go-chart/v2"
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"github.com/julienschmidt/httprouter"
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)
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func Graph(w http.ResponseWriter, r *http.Request, ps httprouter.Params) {
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// $_GET values
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service := ps.ByName("graph")
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if service != "" {
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//serv := strings.TrimPrefix(service, "/")
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serv := strings.Split(service, "/")
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switch serv[1] {
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case "graph":
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kindg := serv[2]
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if kindg != "" {
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switch kindg {
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// case graph pie
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case "pie":
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queryValues := r.URL.Query()
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labels := strings.Split(queryValues.Get("l"), "|")
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values := strings.Split(queryValues.Get("v"), "|")
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qtyl := len(labels)
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qtyv := len(values)
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// cjeck qty and equal values from url
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if qtyl < 2 {
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fmt.Fprintf(w, "Missing captions in pie")
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return
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}
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if qtyv != qtyl {
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fmt.Fprintf(w, "Labels and values mismatch")
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return
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}
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var cvalues []chart.Value
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var row chart.Value
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// fill values
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for index, line := range labels {
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valuefloat, _ := strconv.ParseFloat(values[index], 64)
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row.Value = valuefloat
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row.Label = line
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cvalues = append(cvalues, row)
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}
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pie := chart.PieChart{
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Width: 512,
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Height: 512,
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Values: cvalues,
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}
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w.Header().Set("Content-Type", "image/png")
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err := pie.Render(chart.PNG, w)
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if err != nil {
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fmt.Printf("Error rendering pie chart: %v\n", err)
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}
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// case graph bar
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case "bar":
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queryValues := r.URL.Query()
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labels := strings.Split(queryValues.Get("l"), "|")
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values := strings.Split(queryValues.Get("v"), "|")
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qtyl := len(labels)
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qtyv := len(values)
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// cjeck qty and equal values from url
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if qtyl < 2 {
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fmt.Fprintf(w, "Missing captions in pie")
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return
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}
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if qtyv != qtyl {
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fmt.Fprintf(w, "Labels and values mismatch")
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return
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}
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var cvalues []chart.Value
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var row chart.Value
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// fill values
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for index, line := range labels {
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valuefloat, _ := strconv.ParseFloat(values[index], 64)
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row.Value = valuefloat
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row.Label = line
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cvalues = append(cvalues, row)
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}
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bar := chart.BarChart{
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Height: 512,
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BarWidth: 50,
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Bars: cvalues,
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}
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w.Header().Set("Content-Type", "image/png")
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err := bar.Render(chart.PNG, w)
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if err != nil {
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fmt.Printf("Error rendering pie chart: %v\n", err)
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}
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default:
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fmt.Fprintf(w, "Unknown graph %s!\n", kindg)
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}
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} else {
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fmt.Fprintf(w, "Kind graph not exists")
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}
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//
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default:
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fmt.Fprintf(w, "Unknown option in core service %s!\n", ps.ByName("serv"))
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}
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fmt.Fprintf(w, "Service %s!\n", serv)
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} else {
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fmt.Fprintf(w, "Unknown core service %s!\n", ps.ByName("graph"))
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}
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}
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