tech(influxdb): refactor and cleanup

pkg/tsdb/influxdb/model_parser.go

@@ -0,0 +1,154 @@
+package influxdb
+
+import (
+	"strconv"
+
+	"github.com/grafana/grafana/pkg/components/simplejson"
+)
+
+type InfluxdbQueryParser struct{}
+
+func (qp *InfluxdbQueryParser) Parse(model *simplejson.Json) (*Query, error) {
+	policy := model.Get("policy").MustString("default")
+
+	measurement, err := model.Get("measurement").String()
+	if err != nil {
+		return nil, err
+	}
+
+	resultFormat, err := model.Get("resultFormat").String()
+	if err != nil {
+		return nil, err
+	}
+
+	tags, err := qp.parseTags(model)
+	if err != nil {
+		return nil, err
+	}
+
+	groupBys, err := qp.parseGroupBy(model)
+	if err != nil {
+		return nil, err
+	}
+
+	selects, err := qp.parseSelects(model)
+	if err != nil {
+		return nil, err
+	}
+
+	return &Query{
+		Measurement:  measurement,
+		Policy:       policy,
+		ResultFormat: resultFormat,
+		GroupBy:      groupBys,
+		Tags:         tags,
+		Selects:      selects,
+	}, nil
+}
+
+func (qp *InfluxdbQueryParser) parseSelects(model *simplejson.Json) ([]*Select, error) {
+	var result []*Select
+
+	for _, selectObj := range model.Get("select").MustArray() {
+		selectJson := simplejson.NewFromAny(selectObj)
+		var parts Select
+
+		for _, partObj := range selectJson.MustArray() {
+			part := simplejson.NewFromAny(partObj)
+			queryPart, err := qp.parseQueryPart(part)
+			if err != nil {
+				return nil, err
+			}
+
+			parts = append(parts, *queryPart)
+		}
+
+		result = append(result, &parts)
+	}
+
+	return result, nil
+}
+
+func (*InfluxdbQueryParser) parseTags(model *simplejson.Json) ([]*Tag, error) {
+	var result []*Tag
+	for _, t := range model.Get("tags").MustArray() {
+		tagJson := simplejson.NewFromAny(t)
+		tag := &Tag{}
+		var err error
+
+		tag.Key, err = tagJson.Get("key").String()
+		if err != nil {
+			return nil, err
+		}
+
+		tag.Value, err = tagJson.Get("value").String()
+		if err != nil {
+			return nil, err
+		}
+
+		operator, err := tagJson.Get("operator").String()
+		if err == nil {
+			tag.Operator = operator
+		}
+
+		condition, err := tagJson.Get("condition").String()
+		if err == nil {
+			tag.Condition = condition
+		}
+
+		result = append(result, tag)
+	}
+
+	return result, nil
+}
+
+func (*InfluxdbQueryParser) parseQueryPart(model *simplejson.Json) (*QueryPart, error) {
+	typ, err := model.Get("type").String()
+	if err != nil {
+		return nil, err
+	}
+
+	var params []string
+	for _, paramObj := range model.Get("params").MustArray() {
+		param := simplejson.NewFromAny(paramObj)
+
+		stringParam, err := param.String()
+		if err == nil {
+			params = append(params, stringParam)
+			continue
+		}
+
+		intParam, err := param.Int()
+		if err == nil {
+			params = append(params, strconv.Itoa(intParam))
+			continue
+		}
+
+		return nil, err
+
+	}
+
+	qp, err := NewQueryPart(typ, params)
+	if err != nil {
+		return nil, err
+	}
+
+	return qp, nil
+	//return &QueryPart{Type: typ, Params: params}, nil
+}
+
+func (qp *InfluxdbQueryParser) parseGroupBy(model *simplejson.Json) ([]*QueryPart, error) {
+	var result []*QueryPart
+
+	for _, groupObj := range model.Get("groupBy").MustArray() {
+		groupJson := simplejson.NewFromAny(groupObj)
+		queryPart, err := qp.parseQueryPart(groupJson)
+
+		if err != nil {
+			return nil, err
+		}
+		result = append(result, queryPart)
+	}
+
+	return result, nil
+}