Unleash/unleash-client-go

package constraints

import (
    "github.com/Unleash/unleash-client-go/v3/api"
    "github.com/Unleash/unleash-client-go/v3/context"
    "strings"
)

func operatorStrContains(ctx *context.Context, constraint api.Constraint) bool {
    return operatorStr(ctx, constraint, strings.Contains)
}

func operatorStrStartsWith(ctx *context.Context, constraint api.Constraint) bool {
    return operatorStr(ctx, constraint, strings.HasPrefix)
}

func operatorStrEndsWith(ctx *context.Context, constraint api.Constraint) bool {
    return operatorStr(ctx, constraint, strings.HasSuffix)
}

func operatorStr(
    ctx *context.Context,
    constraint api.Constraint,
    check func(context string, constraint string) bool,
) bool {
    contextValue := toLowerIfCaseInsensitive(constraint, ctx.Field(constraint.ContextName))

    for _, constraintValue := range constraint.Values {
        if check(contextValue, toLowerIfCaseInsensitive(constraint, constraintValue)) {
            return true
        }
    }

    return false
}

func toLowerIfCaseInsensitive(constraint api.Constraint, value string) string {
    if constraint.CaseInsensitive {
        return strings.ToLower(value)
    } else {
        return value
    }
}