58 lines
1.2 KiB
Go
58 lines
1.2 KiB
Go
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package service
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import (
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"errors"
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"strconv"
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"strings"
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)
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// versionAtMost will return true if the provided version is less than or equal to max
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func versionAtMost(version, max []int) (bool, error) {
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if comp, err := versionCompare(version, max); err != nil {
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return false, err
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} else if comp == 1 {
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return false, nil
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}
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return true, nil
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}
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// versionCompare take to versions split into integer arrays and attempts to compare them
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// An error will be returned if there is an array length mismatch.
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// Return values are as follows
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// -1 - v1 is less than v2
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// 0 - v1 is equal to v2
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// 1 - v1 is greater than v2
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func versionCompare(v1, v2 []int) (int, error) {
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if len(v1) != len(v2) {
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return 0, errors.New("version length mismatch")
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}
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for idx, v2S := range v2 {
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v1S := v1[idx]
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if v1S > v2S {
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return 1, nil
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}
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if v1S < v2S {
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return -1, nil
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}
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}
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return 0, nil
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}
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// parseVersion will parse any integer type version seperated by periods.
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// This does not fully support semver style versions.
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func parseVersion(v string) []int {
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version := make([]int, 3)
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for idx, vStr := range strings.Split(v, ".") {
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vS, err := strconv.Atoi(vStr)
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if err != nil {
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return nil
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}
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version[idx] = vS
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}
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return version
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}
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