172 lines
2.9 KiB
Go
172 lines
2.9 KiB
Go
// Copyright © 2016 Abcum Ltd
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package sql
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import (
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"fmt"
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"regexp"
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"strconv"
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"strings"
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"time"
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json "github.com/hjson/hjson-go"
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)
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func (p *parser) in(token Token, tokens []Token) bool {
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for _, t := range tokens {
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if token == t {
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return true
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}
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}
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return false
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}
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func (p *parser) is(token Token, tokens ...Token) bool {
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for _, t := range tokens {
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if token == t {
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return true
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}
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}
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return false
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}
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func (p *parser) contains(search string, strings []string) bool {
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for _, str := range strings {
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if str == search {
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return true
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}
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}
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return false
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}
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func (p *parser) declare(tok Token, lit string) (interface{}, error) {
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if val := p.hold(tok); val != nil {
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return val, nil
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}
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switch tok {
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case NULL:
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return nil, nil
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case TRUE:
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return true, nil
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case FALSE:
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return false, nil
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case VOID:
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return &Void{}, nil
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case MISSING:
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return &Void{}, nil
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case EMPTY:
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return &Empty{}, nil
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case MUL:
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return &All{}, nil
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case QMARK:
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return &Any{}, nil
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case STRING:
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return &Value{lit}, nil
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case REGION:
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return &Value{lit}, nil
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case EXPR:
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return &Ident{lit}, nil
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case IDENT:
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return &Ident{lit}, nil
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case TABLE:
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return &Table{lit}, nil
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case PARAM:
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return &Param{lit}, nil
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case DATE:
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return time.Parse(RFCDate, lit)
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case TIME:
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return time.Parse(RFCTime, lit)
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case REGEX:
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return regexp.Compile(lit)
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case NUMBER:
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val, err := strconv.ParseFloat(lit, 64)
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if err != nil {
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return val, fmt.Errorf("Invalid number: %s", lit)
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}
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return val, nil
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case DOUBLE:
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val, err := strconv.ParseFloat(lit, 64)
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if err != nil {
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return val, fmt.Errorf("Invalid number: %s", lit)
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}
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return val, nil
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case DURATION:
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var mul time.Duration
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switch {
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default:
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mul = 1
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case strings.HasSuffix(lit, "d"):
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mul, lit = 24, strings.Replace(lit, "d", "h", -1)
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case strings.HasSuffix(lit, "w"):
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mul, lit = 168, strings.Replace(lit, "w", "h", -1)
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}
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val, err := time.ParseDuration(lit)
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if err != nil {
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return val, fmt.Errorf("Invalid duration: %s", lit)
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}
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return val * mul, nil
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case ARRAY:
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var j []interface{}
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json.Unmarshal([]byte(lit), &j)
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if j == nil {
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return j, fmt.Errorf("Invalid JSON: %s", lit)
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}
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return j, nil
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case JSON:
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var j map[string]interface{}
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json.Unmarshal([]byte(lit), &j)
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if j == nil {
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return j, fmt.Errorf("Invalid JSON: %s", lit)
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}
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return j, nil
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}
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return lit, nil
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}
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