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selector.go
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selector.go
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/*
* Copyright (c) 2018. Abstrium SAS <team (at) pydio.com>
* This file is part of Pydio Cells.
*
* Pydio Cells is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Pydio Cells is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with Pydio Cells. If not, see <http://www.gnu.org/licenses/>.
*
* The latest code can be found at <https://pydio.com>.
*/
package jobs
import (
"context"
"strconv"
"github.com/micro/go-micro/client"
)
var (
fieldEvaluators []FieldEvaluator
)
type FieldEvaluator interface {
EvaluateField(ctx context.Context, input ActionMessage, value string) string
}
type InputSelector interface {
Select(cl client.Client, ctx context.Context, input ActionMessage, objects chan interface{}, done chan bool) error
MultipleSelection() bool
}
type InputFilter interface {
Filter(ctx context.Context, input ActionMessage) (ActionMessage, bool)
}
// RegisterFieldEvaluator adds a new evaluator to internal registry
func RegisterFieldEvaluator(evaluator FieldEvaluator) {
fieldEvaluators = append(fieldEvaluators, evaluator)
}
// GetFieldEvaluators lists all registered evaluators
func GetFieldEvaluators() []FieldEvaluator {
return fieldEvaluators
}
// EvaluateFieldStr goes through all registered evaluators to modify string value on the fly
func EvaluateFieldStr(ctx context.Context, input ActionMessage, value string) string {
output := value
for _, e := range fieldEvaluators {
output = e.EvaluateField(ctx, input, output)
}
return output
}
// EvaluateFieldStr goes through all registered evaluators to modify string value on the fly
func EvaluateFieldStrSlice(ctx context.Context, input ActionMessage, values []string) []string {
for i, v := range values {
values[i] = EvaluateFieldStr(ctx, input, v)
}
return values
}
func EvaluateFieldBool(ctx context.Context, input ActionMessage, value string) (bool, error) {
strVal := EvaluateFieldStr(ctx, input, value)
if strVal == "" { // consider empty string is false
return false, nil
}
return strconv.ParseBool(strVal)
}
func EvaluateFieldInt(ctx context.Context, input ActionMessage, value string) (int, error) {
strVal := EvaluateFieldStr(ctx, input, value)
if i, e := strconv.ParseInt(strVal, 10, 64); e == nil {
return int(i), nil
} else {
return 0, e
}
}
func EvaluateFieldInt64(ctx context.Context, input ActionMessage, value string) (int64, error) {
strVal := EvaluateFieldStr(ctx, input, value)
return strconv.ParseInt(strVal, 10, 64)
}