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Merge pull request #1 from maditya/pg-filter
add pg filter based on mysql filter
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,187 @@ | ||
| // Copyright 2019 The Grafeas Authors. All rights reserved. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
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| package storage | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "log" | ||
| "strings" | ||
|
|
||
| syntax "github.com/grafeas/grafeas/cel" | ||
| "github.com/grafeas/grafeas/go/filtering/common" | ||
| "github.com/grafeas/grafeas/go/filtering/operators" | ||
| "github.com/grafeas/grafeas/go/filtering/parser" | ||
| ) | ||
|
|
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| // var fs filterSql | ||
| // fmt.Println("\nsql:", fs.makeSql(expr)) | ||
|
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| type PgsqlFilterSql struct { | ||
| selects int | ||
| } | ||
|
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| func (fs *PgsqlFilterSql) sqlFromCall(func_name string, args []*syntax.Expr) string { | ||
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| var sql_op string | ||
| switch func_name { | ||
| case operators.Equals: | ||
| sql_op = "=" | ||
| case operators.Greater: | ||
| sql_op = ">" | ||
| case operators.GreaterEquals: | ||
| sql_op = ">=" | ||
| case operators.Less: | ||
| sql_op = "<" | ||
| case operators.LessEquals: | ||
| sql_op = "<=" | ||
| case operators.NotEquals: | ||
| sql_op = "!=" | ||
| case operators.LogicalAnd: | ||
| sql_op = "AND" | ||
| case operators.LogicalOr: | ||
| sql_op = "OR" | ||
| case operators.Index: | ||
| sql_op = "[" | ||
| default: | ||
| sql_op = "" | ||
| } | ||
| var arg_names []string | ||
| for _, arg := range args { | ||
| arg_names = append(arg_names, fs.makeSql(arg)) | ||
| } | ||
| if sql_op == "[" { | ||
| return fmt.Sprintf("%s[%s]", arg_names[0], arg_names[1]) | ||
| } else if sql_op != "" { | ||
| return fmt.Sprintf("(%s %s %s)", arg_names[0], sql_op, arg_names[1]) | ||
| } else { | ||
| return fmt.Sprintf("%s(%s)", func_name, strings.Join(arg_names, ", ")) | ||
| } | ||
| } | ||
|
|
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| func (fs *PgsqlFilterSql) sqlFromSelect(select_node syntax.Expr_Select) string { | ||
| operand := fs.makeSql(select_node.GetOperand()) | ||
| field := select_node.GetField() | ||
| return fmt.Sprintf("%s.%s", operand, field) | ||
| } | ||
|
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| func (fs *PgsqlFilterSql) getConstantValue(const_expr syntax.Constant) string { | ||
|
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| switch const_expr.GetConstantKind().(type) { | ||
| case *syntax.Constant_Int64Value: | ||
| return fmt.Sprintf("%d", const_expr.GetInt64Value()) | ||
| case *syntax.Constant_Uint64Value: | ||
| return fmt.Sprintf("%d", const_expr.GetUint64Value()) | ||
| //case *syntax.Constant_DoubleValue: // TODO: fix | ||
| // return fmt.Sprintf("%d", const_expr.GetDoubleValue()) | ||
| case *syntax.Constant_StringValue: | ||
| //return fmt.Sprintf("\"%s\"", const_expr.GetStringValue()) | ||
| return fmt.Sprintf("'%s'", const_expr.GetStringValue()) | ||
| } | ||
| return "NO CONST" | ||
| } | ||
|
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| func (fs *PgsqlFilterSql) makeSql(node *syntax.Expr) string { | ||
| //log.Println("depth: ", fs.depth, "node:", node) | ||
| switch node.GetExprKind().(type) { | ||
| case *syntax.Expr_CallExpr: | ||
| func_node := *node.GetCallExpr() | ||
| return fs.sqlFromCall(func_node.Function, func_node.Args) | ||
| case *syntax.Expr_SelectExpr: | ||
| select_node := *node.GetSelectExpr() | ||
| fs.selects++ | ||
| ret_str := fs.sqlFromSelect(select_node) | ||
| fs.selects-- | ||
| if fs.selects == 0 { | ||
| spl := strings.Split(ret_str, ".") | ||
| ret_val := "data" | ||
| sep := "->'" | ||
| sep2 := "->>'" | ||
| for i := 0; i < len(spl); i++ { | ||
| if i != len(spl)-1 { | ||
| ret_val = ret_val + sep + spl[i] + "'" | ||
| } else { | ||
| ret_val = ret_val + sep2 + spl[i] + "'" | ||
| } | ||
| } | ||
|
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| //return "data->'$." + ret_str + "'" | ||
| //return "data->'" + ret_str + "'" | ||
| return ret_val | ||
| } else { | ||
| return ret_str | ||
| } | ||
| case *syntax.Expr_IdentExpr: | ||
| i_expr := *node.GetIdentExpr() | ||
| // I'm not entirely sure this is the right thing here. | ||
| // We'll see though. | ||
| if fs.selects > 0 { | ||
| return i_expr.Name | ||
| } else { | ||
| //return "data->'$." + i_expr.Name + "'" | ||
| return "data->>'" + i_expr.Name + "'" | ||
| } | ||
| case *syntax.Expr_ConstExpr: | ||
| c_expr := *node.GetConstExpr() | ||
| return fs.getConstantValue(c_expr) | ||
| } | ||
|
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| return "NO SQL" | ||
|
|
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| } | ||
|
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| func (fs *PgsqlFilterSql) ParseFilter(filter string) string { | ||
|
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| log.Println(filter) | ||
| // replace string value for kind with integer | ||
| /* | ||
| kindPattern := `kind=".*?"` | ||
| re := regexp.MustCompile(kindPattern) | ||
| indices := re.FindStringIndex(filter) | ||
| if indices != nil { | ||
| int_val := 0 | ||
| switch filter[indices[0]+6 : indices[1]-1] { | ||
| case "VULNERABILITY": | ||
| int_val = 1 | ||
| case "BUILD": | ||
| int_val = 2 | ||
| case "IMAGE": | ||
| int_val = 3 | ||
| case "PACKAGE": | ||
| int_val = 4 | ||
| case "DEPLOYMENT": | ||
| int_val = 5 | ||
| case "DISCOVERY": | ||
| int_val = 6 | ||
| case "ATTESTATION": | ||
| int_val = 7 | ||
| case "INTOTO": | ||
| int_val = 8 | ||
| } | ||
| filter = filter[:indices[0]+5] + fmt.Sprintf("%d", int_val) + filter[indices[1]:] | ||
| // log.Println(filter) | ||
| } | ||
| */ | ||
| s := common.NewStringSource(filter, "urlParam") // function | ||
| result, err := parser.Parse(s) | ||
| if err != nil { | ||
| log.Println(err) | ||
| return "" | ||
| } | ||
| // log.Println(result.Expr.GetCallExpr().Args[1].GetCallExpr().Args[0].GetIdentExpr().Name) | ||
| // log.Println(result.Expr) | ||
| sql := fs.makeSql(result.Expr) | ||
| //log.Println(sql) | ||
| return sql | ||
| } |
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