75 lines
2.7 KiB
Go
75 lines
2.7 KiB
Go
package common
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import (
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"regexp"
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"strings"
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"github.com/lucasb-eyer/go-colorful"
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)
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// Colors holds all the valid html color names for MovieNight
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// the values in colors must be lowercase so it matches with the color input
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// this saves from having to call strings.ToLower(color) every time to check
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var Colors = []string{
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"aliceblue", "antiquewhite", "aqua", "aquamarine", "azure",
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"beige", "bisque", "blanchedalmond", "blueviolet", "brown",
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"burlywood", "cadetblue", "chartreuse", "chocolate", "coral",
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"cornflowerblue", "cornsilk", "crimson", "cyan", "darkcyan",
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"darkgoldenrod", "darkgray", "darkkhaki", "darkmagenta", "darkolivegreen",
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"darkorange", "darkorchid", "darksalmon", "darkseagreen", "darkslateblue",
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"darkslategray", "darkturquoise", "darkviolet", "deeppink", "deepskyblue",
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"dimgray", "dodgerblue", "firebrick", "floralwhite", "forestgreen",
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"fuchsia", "gainsboro", "ghostwhite", "gold", "goldenrod",
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"gray", "greenyellow", "honeydew", "hotpink", "indigo",
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"ivory", "khaki", "lavender", "lavenderblush", "lawngreen",
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"lemonchiffon", "lightblue", "lightcoral", "lightcyan", "lightgoldenrodyellow",
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"lightgrey", "lightgreen", "lightpink", "lightsalmon", "lightseagreen",
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"lightskyblue", "lightslategray", "lightsteelblue", "lightyellow", "lime",
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"limegreen", "linen", "magenta", "mediumaquamarine", "mediumorchid",
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"mediumpurple", "mediumseagreen", "mediumslateblue", "mediumspringgreen", "mediumturquoise",
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"mediumvioletred", "mintcream", "mistyrose", "moccasin", "navajowhite",
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"oldlace", "olive", "olivedrab", "orange", "orangered",
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"orchid", "palegoldenrod", "palegreen", "paleturquoise", "palevioletred",
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"papayawhip", "peachpuff", "peru", "pink", "plum",
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"powderblue", "purple", "rebeccapurple", "red", "rosybrown",
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"royalblue", "saddlebrown", "salmon", "sandybrown", "seagreen",
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"seashell", "sienna", "silver", "skyblue", "slateblue",
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"slategray", "snow", "springgreen", "steelblue", "tan",
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"teal", "thistle", "tomato", "turquoise", "violet",
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"wheat", "white", "whitesmoke", "yellow", "yellowgreen",
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}
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var (
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regexColor = regexp.MustCompile(`^#([0-9A-Fa-f]{3}){1,2}$`)
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)
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// IsValidColor takes a string s and compares it against a list of css color names.
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// It also accepts hex codes in the form of #RGB and #RRGGBB
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func IsValidColor(s string) bool {
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s = strings.ToLower(s)
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for _, c := range Colors {
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if s == c {
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return true
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}
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}
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if regexColor.MatchString(s) {
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c, err := colorful.Hex(s)
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if err != nil {
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return false
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}
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total := c.R + c.G + c.B
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return total > 0.7 && c.B/total < 0.7
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}
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return false
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}
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// RandomColor returns a hex color code
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func RandomColor() string {
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var color colorful.Color
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for !IsValidColor(color.Hex()) {
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color = colorful.FastHappyColor()
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}
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return color.Hex()
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}
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