439 lines
11 KiB
Go
439 lines
11 KiB
Go
// MIT License
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// Copyright (c) 2022 Tree Xie
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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package charts
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import (
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"bytes"
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"encoding/json"
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"fmt"
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"regexp"
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"strconv"
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"github.com/wcharczuk/go-chart/v2"
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)
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func convertToArray(data []byte) []byte {
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data = bytes.TrimSpace(data)
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if len(data) == 0 {
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return nil
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}
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if data[0] != '[' {
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data = []byte("[" + string(data) + "]")
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}
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return data
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}
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type EChartsPosition string
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func (p *EChartsPosition) UnmarshalJSON(data []byte) error {
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if len(data) == 0 {
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return nil
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}
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if regexp.MustCompile(`^\d+`).Match(data) {
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data = []byte(fmt.Sprintf(`"%s"`, string(data)))
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}
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s := (*string)(p)
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return json.Unmarshal(data, s)
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}
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type EChartStyle struct {
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Color string `json:"color"`
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}
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func (es *EChartStyle) ToStyle() chart.Style {
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color := parseColor(es.Color)
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return chart.Style{
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FillColor: color,
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FontColor: color,
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StrokeColor: color,
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}
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}
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type EChartsSeriesData struct {
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Value float64 `json:"value"`
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Name string `json:"name"`
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ItemStyle EChartStyle `json:"itemStyle"`
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}
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type _EChartsSeriesData EChartsSeriesData
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var numericRep = regexp.MustCompile(`^[-+]?[0-9]+(?:\\.[0-9]+)?$`)
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func (es *EChartsSeriesData) UnmarshalJSON(data []byte) error {
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data = bytes.TrimSpace(data)
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if len(data) == 0 {
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return nil
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}
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if numericRep.Match(data) {
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v, err := strconv.ParseFloat(string(data), 64)
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if err != nil {
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return err
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}
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es.Value = v
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return nil
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}
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v := _EChartsSeriesData{}
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err := json.Unmarshal(data, &v)
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if err != nil {
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return err
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}
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es.Name = v.Name
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es.Value = v.Value
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es.ItemStyle = v.ItemStyle
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return nil
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}
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type EChartsXAxisData struct {
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BoundaryGap *bool `json:"boundaryGap"`
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SplitNumber int `json:"splitNumber"`
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Data []string `json:"data"`
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}
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type EChartsXAxis struct {
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Data []EChartsXAxisData
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}
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func (ex *EChartsXAxis) UnmarshalJSON(data []byte) error {
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data = convertToArray(data)
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if len(data) == 0 {
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return nil
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}
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return json.Unmarshal(data, &ex.Data)
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}
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type EChartsAxisLabel struct {
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Formatter string `json:"formatter"`
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}
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type EChartsYAxisData struct {
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Min *float64 `json:"min"`
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Max *float64 `json:"max"`
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AxisLabel EChartsAxisLabel `json:"axisLabel"`
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AxisLine struct {
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LineStyle struct {
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Color string `json:"color"`
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} `json:"lineStyle"`
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} `json:"axisLine"`
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}
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type EChartsYAxis struct {
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Data []EChartsYAxisData `json:"data"`
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}
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func (ey *EChartsYAxis) UnmarshalJSON(data []byte) error {
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data = convertToArray(data)
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if len(data) == 0 {
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return nil
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}
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return json.Unmarshal(data, &ey.Data)
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}
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type EChartsPadding struct {
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Box chart.Box
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}
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func (eb *EChartsPadding) UnmarshalJSON(data []byte) error {
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data = convertToArray(data)
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if len(data) == 0 {
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return nil
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}
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arr := make([]int, 0)
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err := json.Unmarshal(data, &arr)
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if err != nil {
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return err
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}
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if len(arr) == 0 {
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return nil
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}
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switch len(arr) {
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case 1:
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eb.Box = chart.Box{
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Left: arr[0],
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Top: arr[0],
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Bottom: arr[0],
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Right: arr[0],
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}
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case 2:
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eb.Box = chart.Box{
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Top: arr[0],
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Bottom: arr[0],
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Left: arr[1],
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Right: arr[1],
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}
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default:
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result := make([]int, 4)
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copy(result, arr)
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if len(arr) == 3 {
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result[3] = result[1]
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}
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// 上右下左
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eb.Box = chart.Box{
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Top: result[0],
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Right: result[1],
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Bottom: result[2],
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Left: result[3],
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}
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}
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return nil
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}
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type EChartsLabelOption struct {
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Show bool `json:"show"`
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Distance int `json:"distance"`
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Color string `json:"color"`
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}
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type EChartsLegend struct {
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Show *bool `json:"show"`
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Data []string `json:"data"`
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Align string `json:"align"`
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Orient string `json:"orient"`
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Padding EChartsPadding `json:"padding"`
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Left EChartsPosition `json:"left"`
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Top EChartsPosition `json:"top"`
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TextStyle EChartsTextStyle `json:"textStyle"`
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}
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type EChartsMarkPoint struct {
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SymbolSize int `json:"symbolSize"`
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Data []struct {
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Type string `json:"type"`
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} `json:"data"`
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}
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func (emp *EChartsMarkPoint) ToSeriesMarkPoint() SeriesMarkPoint {
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sp := SeriesMarkPoint{
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SymbolSize: emp.SymbolSize,
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}
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if len(emp.Data) == 0 {
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return sp
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}
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data := make([]SeriesMarkData, len(emp.Data))
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for index, item := range emp.Data {
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data[index] = SeriesMarkData{
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Type: item.Type,
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}
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}
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sp.Data = data
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return sp
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}
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type EChartsMarkLine struct {
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Data []struct {
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Type string `json:"type"`
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} `json:"data"`
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}
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func (eml *EChartsMarkLine) ToSeriesMarkLine() SeriesMarkLine {
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sl := SeriesMarkLine{}
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if len(eml.Data) == 0 {
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return sl
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}
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data := make([]SeriesMarkData, len(eml.Data))
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for index, item := range eml.Data {
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data[index] = SeriesMarkData{
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Type: item.Type,
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}
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}
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sl.Data = data
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return sl
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}
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type EChartsSeries struct {
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Data []EChartsSeriesData `json:"data"`
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Name string `json:"name"`
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Type string `json:"type"`
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Radius string `json:"radius"`
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YAxisIndex int `json:"yAxisIndex"`
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ItemStyle EChartStyle `json:"itemStyle"`
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// label的配置
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Label EChartsLabelOption `json:"label"`
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MarkPoint EChartsMarkPoint `json:"markPoint"`
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MarkLine EChartsMarkLine `json:"markLine"`
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}
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type EChartsSeriesList []EChartsSeries
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func (esList EChartsSeriesList) ToSeriesList() SeriesList {
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seriesList := make(SeriesList, 0, len(esList))
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for _, item := range esList {
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// 如果是pie，则每个子荐生成一个series
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if item.Type == ChartTypePie {
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for _, dataItem := range item.Data {
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seriesList = append(seriesList, Series{
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Type: ChartTypePie,
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Name: dataItem.Name,
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Label: SeriesLabel{
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Show: true,
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},
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Radius: item.Radius,
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Data: []SeriesData{
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{
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Value: dataItem.Value,
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},
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},
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})
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}
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continue
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}
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data := make([]SeriesData, len(item.Data))
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for j, dataItem := range item.Data {
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data[j] = SeriesData{
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Value: dataItem.Value,
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Style: dataItem.ItemStyle.ToStyle(),
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}
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}
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seriesList = append(seriesList, Series{
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Type: item.Type,
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Data: data,
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YAxisIndex: item.YAxisIndex,
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Style: item.ItemStyle.ToStyle(),
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Label: SeriesLabel{
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Color: parseColor(item.Label.Color),
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Show: item.Label.Show,
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Distance: item.Label.Distance,
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},
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Name: item.Name,
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MarkPoint: item.MarkPoint.ToSeriesMarkPoint(),
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MarkLine: item.MarkLine.ToSeriesMarkLine(),
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})
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}
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return seriesList
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}
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type EChartsTextStyle struct {
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Color string `json:"color"`
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FontFamily string `json:"fontFamily"`
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FontSize float64 `json:"fontSize"`
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}
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func (et *EChartsTextStyle) ToStyle() chart.Style {
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s := chart.Style{
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FontSize: et.FontSize,
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FontColor: parseColor(et.Color),
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}
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if et.FontFamily != "" {
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s.Font, _ = GetFont(et.FontFamily)
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}
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return s
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}
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type EChartsOption struct {
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Type string `json:"type"`
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Theme string `json:"theme"`
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FontFamily string `json:"fontFamily"`
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Padding EChartsPadding `json:"padding"`
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Box chart.Box `json:"box"`
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Width int `json:"width"`
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Height int `json:"height"`
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Title struct {
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Text string `json:"text"`
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Subtext string `json:"subtext"`
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Left EChartsPosition `json:"left"`
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Top EChartsPosition `json:"top"`
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TextStyle EChartsTextStyle `json:"textStyle"`
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SubtextStyle EChartsTextStyle `json:"subtextStyle"`
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} `json:"title"`
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XAxis EChartsXAxis `json:"xAxis"`
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YAxis EChartsYAxis `json:"yAxis"`
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Legend EChartsLegend `json:"legend"`
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Series EChartsSeriesList `json:"series"`
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Children []EChartsOption `json:"children"`
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}
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func (eo *EChartsOption) ToOption() ChartOption {
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fontFamily := eo.FontFamily
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if len(fontFamily) == 0 {
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fontFamily = eo.Title.TextStyle.FontFamily
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}
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o := ChartOption{
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Type: eo.Type,
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FontFamily: fontFamily,
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Theme: eo.Theme,
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Title: TitleOption{
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Text: eo.Title.Text,
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Subtext: eo.Title.Subtext,
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Style: eo.Title.TextStyle.ToStyle(),
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SubtextStyle: eo.Title.SubtextStyle.ToStyle(),
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Left: string(eo.Title.Left),
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Top: string(eo.Title.Top),
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},
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Legend: LegendOption{
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Show: eo.Legend.Show,
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Style: eo.Legend.TextStyle.ToStyle(),
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Data: eo.Legend.Data,
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Left: string(eo.Legend.Left),
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Top: string(eo.Legend.Top),
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Align: eo.Legend.Align,
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Orient: eo.Legend.Orient,
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},
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Width: eo.Width,
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Height: eo.Height,
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Padding: eo.Padding.Box,
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Box: eo.Box,
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SeriesList: eo.Series.ToSeriesList(),
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}
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if len(eo.XAxis.Data) != 0 {
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xAxisData := eo.XAxis.Data[0]
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o.XAxis = XAxisOption{
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BoundaryGap: xAxisData.BoundaryGap,
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Data: xAxisData.Data,
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SplitNumber: xAxisData.SplitNumber,
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}
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}
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yAxisOptions := make([]YAxisOption, len(eo.YAxis.Data))
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for index, item := range eo.YAxis.Data {
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yAxisOptions[index] = YAxisOption{
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Min: item.Min,
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Max: item.Max,
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Formatter: item.AxisLabel.Formatter,
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Color: parseColor(item.AxisLine.LineStyle.Color),
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}
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}
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o.YAxisList = yAxisOptions
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if len(eo.Children) != 0 {
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o.Children = make([]ChartOption, len(eo.Children))
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for index, item := range eo.Children {
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o.Children[index] = item.ToOption()
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}
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}
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return o
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}
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func renderEcharts(options, outputType string) ([]byte, error) {
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o := EChartsOption{}
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err := json.Unmarshal([]byte(options), &o)
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if err != nil {
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return nil, err
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}
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opt := o.ToOption()
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opt.Type = outputType
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d, err := Render(opt)
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if err != nil {
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return nil, err
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}
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return d.Bytes()
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}
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func RenderEChartsToPNG(options string) ([]byte, error) {
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return renderEcharts(options, "png")
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}
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func RenderEChartsToSVG(options string) ([]byte, error) {
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return renderEcharts(options, "svg")
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}
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