More initial dev

parse/parse_collection.go

@@ -0,0 +1,112 @@
+package parse
+
+import (
+	"net/http"
+	"strconv"
+	"strings"
+
+	"github.com/rancher/norman/types"
+)
+
+var (
+	defaultLimit = int64(100)
+	maxLimit     = int64(3000)
+)
+
+func QueryOptions(req *http.Request, schema *types.Schema) *types.QueryOptions {
+	if req.Method != http.MethodGet {
+		return nil
+	}
+
+	result := &types.QueryOptions{}
+
+	result.Sort = parseSort(schema, req)
+	result.Pagination = parsePagination(req)
+	result.Conditions = parseFilters(schema, req)
+
+	return result
+}
+
+func parseOrder(req *http.Request) types.SortOrder {
+	order := req.URL.Query().Get("order")
+	if types.SortOrder(order) == types.DESC {
+		return types.DESC
+	}
+	return types.ASC
+}
+
+func parseSort(schema *types.Schema, req *http.Request) types.Sort {
+	sortField := req.URL.Query().Get("sort")
+	if _, ok := schema.CollectionFilters[sortField]; !ok {
+		sortField = ""
+	}
+	return types.Sort{
+		Order: parseOrder(req),
+		Name:  sortField,
+	}
+}
+
+func parsePagination(req *http.Request) *types.Pagination {
+	q := req.URL.Query()
+	limit := q.Get("limit")
+	marker := q.Get("marker")
+
+	result := &types.Pagination{
+		Limit:  &defaultLimit,
+		Marker: marker,
+	}
+
+	if limit != "" {
+		limitInt, err := strconv.ParseInt(limit, 10, 64)
+		if err != nil {
+			return result
+		}
+
+		if limitInt > maxLimit {
+			result.Limit = &maxLimit
+		} else if limitInt > 0 {
+			result.Limit = &limitInt
+		}
+	}
+
+	return result
+}
+
+func parseNameAndOp(value string) (string, string) {
+	name := value
+	op := "eq"
+
+	idx := strings.LastIndex(value, "_")
+	if idx > 0 {
+		op = value[idx+1:]
+		name = value[0:idx]
+	}
+
+	return name, op
+}
+
+func parseFilters(schema *types.Schema, req *http.Request) []*types.QueryCondition {
+	conditions := []*types.QueryCondition{}
+	for key, values := range req.URL.Query() {
+		name, op := parseNameAndOp(key)
+		filter, ok := schema.CollectionFilters[name]
+		if !ok {
+			continue
+		}
+
+		for _, mod := range filter.Modifiers {
+			if op != mod || !types.ValidMod(op) {
+				continue
+			}
+
+			genericValues := []interface{}{}
+			for _, value := range values {
+				genericValues = append(genericValues, value)
+			}
+
+			conditions = append(conditions, types.NewConditionFromString(name, mod, genericValues))
+		}
+	}
+
+	return conditions
+}