func tableToJS()

in analysis/app/trend.go [442:505]
63 lines of code
16 McCabe index (conditional complexity)

func tableToJS(t *table.Table, columns []column) template.JS {
	var out bytes.Buffer
	fmt.Fprint(&out, "{cols: [")
	var slices []table.Slice
	for i, c := range columns {
		if i > 0 {
			fmt.Fprint(&out, ",\n")
		}
		col := t.Column(c.Name)
		slices = append(slices, col)
		if c.Type == "" {
			switch col.(type) {
			case []string:
				c.Type = "string"
			case []int, []float64:
				c.Type = "number"
			default:
				// Matches the hardcoded string below.
				c.Type = "string"
			}
		}
		if c.Label == "" {
			c.Label = c.Name
		}
		data, err := json.Marshal(c)
		if err != nil {
			panic(err)
		}
		out.Write(data)
	}
	fmt.Fprint(&out, "],\nrows: [")
	for i := 0; i < t.Len(); i++ {
		if i > 0 {
			fmt.Fprint(&out, ",\n")
		}
		fmt.Fprint(&out, "{c:[")
		for j := range columns {
			if j > 0 {
				fmt.Fprint(&out, ", ")
			}
			fmt.Fprint(&out, "{v: ")
			var value []byte
			var err error
			switch column := slices[j].(type) {
			case []string:
				value, err = json.Marshal(column[i])
			case []int:
				value, err = json.Marshal(column[i])
			case []float64:
				value, err = json.Marshal(column[i])
			default:
				value = []byte(`"unknown column type"`)
			}
			if err != nil {
				panic(err)
			}
			out.Write(value)
			fmt.Fprint(&out, "}")
		}
		fmt.Fprint(&out, "]}")
	}
	fmt.Fprint(&out, "]}")
	return template.JS(out.String())
}