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107 lines
2.1 KiB
107 lines
2.1 KiB
package json
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import (
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"strconv"
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"github.com/seaweedfs/seaweedfs/weed/query/sqltypes"
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"github.com/tidwall/gjson"
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"github.com/tidwall/match"
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)
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type Query struct {
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Field string
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Op string
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Value string
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}
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func QueryJson(jsonLine string, projections []string, query Query) (passedFilter bool, values []sqltypes.Value) {
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if filterJson(jsonLine, query) {
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passedFilter = true
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fields := gjson.GetMany(jsonLine, projections...)
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for _, f := range fields {
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values = append(values, sqltypes.MakeTrusted(sqltypes.Type(f.Type), sqltypes.StringToBytes(f.Raw)))
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}
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return
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}
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return false, nil
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}
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func filterJson(jsonLine string, query Query) bool {
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value := gjson.Get(jsonLine, query.Field)
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// copied from gjson.go queryMatches() function
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rpv := query.Value
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if !value.Exists() {
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return false
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}
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if query.Op == "" {
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// the query is only looking for existence, such as:
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// friends.#(name)
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// which makes sure that the array "friends" has an element of
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// "name" that exists
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return true
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}
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switch value.Type {
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case gjson.String:
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switch query.Op {
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case "=":
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return value.Str == rpv
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case "!=":
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return value.Str != rpv
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case "<":
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return value.Str < rpv
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case "<=":
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return value.Str <= rpv
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case ">":
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return value.Str > rpv
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case ">=":
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return value.Str >= rpv
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case "%":
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return match.Match(value.Str, rpv)
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case "!%":
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return !match.Match(value.Str, rpv)
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}
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case gjson.Number:
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rpvn, _ := strconv.ParseFloat(rpv, 64)
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switch query.Op {
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case "=":
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return value.Num == rpvn
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case "!=":
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return value.Num != rpvn
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case "<":
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return value.Num < rpvn
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case "<=":
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return value.Num <= rpvn
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case ">":
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return value.Num > rpvn
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case ">=":
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return value.Num >= rpvn
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}
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case gjson.True:
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switch query.Op {
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case "=":
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return rpv == "true"
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case "!=":
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return rpv != "true"
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case ">":
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return rpv == "false"
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case ">=":
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return true
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}
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case gjson.False:
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switch query.Op {
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case "=":
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return rpv == "false"
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case "!=":
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return rpv != "false"
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case "<":
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return rpv == "true"
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case "<=":
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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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