forked from brandonvfx/sg-restful
/
query_parser.go
197 lines (182 loc) · 5.26 KB
/
query_parser.go
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package main
import (
"net/http"
"regexp"
"strings"
log "github.com/Sirupsen/logrus"
)
var queryRegexp = regexp.MustCompile(`^([\w]+)\((.*)\)`)
type queryParseError struct {
StatusCode int
Message string
}
func (qpe queryParseError) Error() string {
return qpe.Message
}
func parseQuery(queryStr string) (readFilters, error) {
manager := GetQPManager()
keys, parsers := manager.GetActiveParsers()
for idx, parser := range parsers {
if parser.CanParseString(queryStr) {
log.Debugf("parser.CanParseString(%s) true for %s\n", queryStr, keys[idx])
rf, err := parser.ParseString(queryStr)
if err != nil {
log.Warnf("Parser.ParseString(%s) failed with:%s", queryStr, err.Error())
return rf, queryParseError{
StatusCode: http.StatusBadRequest,
Message: err.Error(),
}
}
return rf, nil
}
log.Debugf("parser.CanParseString(%s) false for %s\n", queryStr, keys[idx])
}
log.Warnf("parseQuery - Failed to find parser for:%s. Tried %s\n", queryStr, keys)
return newReadFilters(), queryParseError{
StatusCode: http.StatusBadRequest,
Message: "No QueryFormats can parse input",
}
}
//
// func parseQuery(queryStr string) (readFilters, error) {
// query := newReadFilters()
//
// if strings.HasPrefix(queryStr, "AND") || strings.HasPrefix(queryStr, "and") ||
// strings.HasPrefix(queryStr, "OR") || strings.HasPrefix(queryStr, "or") {
// // Format: and([key, comparitor, value],[key, comparitor, value] ...)
// // or([key, comparitor, value],[key, comparitor, value] ...)
// log.Debugf("Starts with AND/OR")
// matches := queryRegexp.FindStringSubmatch(queryStr)
// if matches != nil {
// if len(matches) != 3 {
// return query, queryParseError{
// StatusCode: http.StatusBadRequest,
// Message: "Invalid query format",
// }
// }
//
// var filtersStr string
// if strings.HasPrefix(matches[2], "[[") {
// filtersStr = matches[2]
// } else if strings.HasPrefix(matches[2], "[") {
// filtersStr = "[" + matches[2] + "]"
// } else {
// return query, queryParseError{
// StatusCode: http.StatusBadRequest,
// Message: "Invalid query filter format",
// }
// }
//
// var filters []interface{}
// err := json.Unmarshal([]byte(filtersStr), &filters)
// if err != nil {
// return query, queryParseError{
// StatusCode: http.StatusBadRequest,
// Message: err.Error(),
// }
// }
//
// queryData := map[string]interface{}{
// "logical_operator": matches[1],
// "conditions": filters,
// }
//
// err = mapToReadFilters(queryData, &query)
//
// return query, err
//
// }
// return query, queryParseError{
// StatusCode: http.StatusBadRequest,
// Message: "Invalid query format",
// }
//
// } else if strings.HasPrefix(queryStr, "{") {
// // Format: {"logical_operator": "and", "conditions": [[key, comparitor, value], ...]}
// log.Debugf("Is JSON hash")
// var queryData map[string]interface{}
// err := json.Unmarshal([]byte(queryStr), &queryData)
// if err != nil {
// return query, queryParseError{
// StatusCode: http.StatusBadRequest,
// Message: err.Error(),
// }
// }
//
// if _, ok := queryData["logical_operator"]; !ok {
// return query, queryParseError{
// StatusCode: http.StatusBadRequest,
// Message: "Missing key: 'logical_operator'",
// }
// }
//
// if _, ok := queryData["conditions"]; !ok {
// return query, queryParseError{
// StatusCode: http.StatusBadRequest,
// Message: "Missing key: 'conditions'",
// }
// }
// err = mapToReadFilters(queryData, &query)
//
// return query, err
//
// } else if strings.HasPrefix(queryStr, "[[") {
// // Format: [[key, comparitor, value], ...]
// log.Debugf("Is JSON array of arrays")
// var filters []interface{}
// err := json.Unmarshal([]byte(queryStr), &filters)
// if err != nil {
// return query, queryParseError{
// StatusCode: http.StatusBadRequest,
// Message: err.Error(),
// }
// }
// queryData := map[string]interface{}{
// "logical_operator": "and",
// "conditions": filters,
// }
// err = mapToReadFilters(queryData, &query)
// return query, err
//
// }
//
// return query, queryParseError{
// StatusCode: http.StatusBadRequest,
// Message: "Invalid query format",
// }
//
// }
//
func mapToReadFilters(queryMap map[string]interface{}, query *readFilters) error {
op, ok := queryMap["logical_operator"]
if !ok {
return queryParseError{
StatusCode: http.StatusInternalServerError,
Message: "Missing key: 'logical_operator'",
}
}
conditions, ok := queryMap["conditions"]
if !ok {
return queryParseError{
StatusCode: http.StatusInternalServerError,
Message: "Missing key: 'conditions'",
}
}
query.LogicalOperator = strings.ToLower(op.(string))
log.Debugf("Conditions: %v", conditions)
for _, condition := range conditions.([]interface{}) {
filter := condition.([]interface{})
log.Debugf("Filter: %v", filter)
cond := arrayToQueryCondition(filter)
log.Debugf("Condition: %v", cond)
query.AddCondition(cond)
}
return nil
}
func arrayToQueryCondition(filter []interface{}) queryCondition {
return newQueryCondition(
filter[0].(string), // name
filter[1].(string), // relation
filter[2], // values
)
}