/
observedproperty.go
executable file
·168 lines (135 loc) · 5.32 KB
/
observedproperty.go
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package postgis
import (
"fmt"
entities "github.com/gost/core"
"database/sql"
"errors"
gostErrors "github.com/gost/server/errors"
"github.com/gost/server/sensorthings/odata"
)
func observedPropertyParamFactory(values map[string]interface{}) (entities.Entity, error) {
op := &entities.ObservedProperty{}
for as, value := range values {
if value == nil {
continue
}
if as == asMappings[entities.EntityTypeObservedProperty][observedPropertyID] {
op.ID = value
} else if as == asMappings[entities.EntityTypeObservedProperty][observedPropertyName] {
op.Name = value.(string)
} else if as == asMappings[entities.EntityTypeObservedProperty][observedPropertyDescription] {
op.Description = value.(string)
} else if as == asMappings[entities.EntityTypeObservedProperty][observedPropertyDefinition] {
op.Definition = value.(string)
}
}
return op, nil
}
// GetObservedProperty returns an ObservedProperty by id
func (gdb *GostDatabase) GetObservedProperty(id interface{}, qo *odata.QueryOptions) (*entities.ObservedProperty, error) {
intID, ok := ToIntID(id)
if !ok {
return nil, gostErrors.NewRequestNotFound(errors.New("ObservedProperty does not exist"))
}
query, qi := gdb.QueryBuilder.CreateQuery(&entities.ObservedProperty{}, nil, intID, qo)
observedProperty, err := processObservedProperty(gdb.Db, query, qi)
if err != nil {
return nil, err
}
return observedProperty, nil
}
// GetObservedPropertyByDatastream returns an ObservedProperty by id
func (gdb *GostDatabase) GetObservedPropertyByDatastream(id interface{}, qo *odata.QueryOptions) (*entities.ObservedProperty, error) {
intID, ok := ToIntID(id)
if !ok {
return nil, gostErrors.NewRequestNotFound(errors.New("Datastream does not exist"))
}
query, qi := gdb.QueryBuilder.CreateQuery(&entities.ObservedProperty{}, &entities.Datastream{}, intID, qo)
observedProperty, err := processObservedProperty(gdb.Db, query, qi)
if err != nil {
return nil, err
}
return observedProperty, nil
}
// GetObservedProperties returns all bool, observed properties
func (gdb *GostDatabase) GetObservedProperties(qo *odata.QueryOptions) ([]*entities.ObservedProperty, int, bool, error) {
query, qi := gdb.QueryBuilder.CreateQuery(&entities.ObservedProperty{}, nil, nil, qo)
countSQL := gdb.QueryBuilder.CreateCountQuery(&entities.ObservedProperty{}, nil, nil, qo)
return processObservedProperties(gdb.Db, query, qo, qi, countSQL)
}
func processObservedProperty(db *sql.DB, sql string, qi *QueryParseInfo) (*entities.ObservedProperty, error) {
ops, _, _, err := processObservedProperties(db, sql, nil, qi, "")
if err != nil {
return nil, err
}
if len(ops) == 0 {
return nil, gostErrors.NewRequestNotFound(errors.New("ObservedProperty not found"))
}
return ops[0], nil
}
func processObservedProperties(db *sql.DB, sql string, qo *odata.QueryOptions, qi *QueryParseInfo, countSQL string) ([]*entities.ObservedProperty, int, bool, error) {
data, hasNext, err := ExecuteSelect(db, qi, sql, qo)
if err != nil {
return nil, 0, hasNext, fmt.Errorf("Error executing query %v", err)
}
obs := make([]*entities.ObservedProperty, 0)
for _, d := range data {
entity := d.(*entities.ObservedProperty)
obs = append(obs, entity)
}
var count int
if len(countSQL) > 0 {
count, err = ExecuteSelectCount(db, countSQL)
if err != nil {
return nil, 0, hasNext, fmt.Errorf("Error executing count %v", err)
}
}
return obs, count, hasNext, nil
}
// PostObservedProperty adds an ObservedProperty to the database
func (gdb *GostDatabase) PostObservedProperty(op *entities.ObservedProperty) (*entities.ObservedProperty, error) {
var opID int
query := fmt.Sprintf("INSERT INTO %s.observedproperty (name, definition, description) VALUES ($1, $2, $3) RETURNING id", gdb.Schema)
err := gdb.Db.QueryRow(query, op.Name, op.Definition, op.Description).Scan(&opID)
if err != nil {
return nil, err
}
op.ID = opID
return op, nil
}
// PutObservedProperty updates a ObservedProperty in the database
func (gdb *GostDatabase) PutObservedProperty(id interface{}, op *entities.ObservedProperty) (*entities.ObservedProperty, error) {
return gdb.PatchObservedProperty(id, op)
}
// ObservedPropertyExists checks if a ObservedProperty is present in the database based on a given id.
func (gdb *GostDatabase) ObservedPropertyExists(id interface{}) bool {
return EntityExists(gdb, id, "observedproperty")
}
// PatchObservedProperty updates a ObservedProperty in the database
func (gdb *GostDatabase) PatchObservedProperty(id interface{}, op *entities.ObservedProperty) (*entities.ObservedProperty, error) {
var err error
var ok bool
var intID int
updates := make(map[string]interface{})
if intID, ok = ToIntID(id); !ok || !gdb.ObservedPropertyExists(intID) {
return nil, gostErrors.NewRequestNotFound(errors.New("ObservedProperty does not exist"))
}
if len(op.Description) > 0 {
updates["description"] = op.Description
}
if len(op.Definition) > 0 {
updates["definition"] = op.Definition
}
if len(op.Name) > 0 {
updates["name"] = op.Name
}
if err = gdb.updateEntityColumns("observedproperty", updates, intID); err != nil {
return nil, err
}
ns, _ := gdb.GetObservedProperty(intID, nil)
return ns, nil
}
// DeleteObservedProperty tries to delete a ObservedProperty by the given id
func (gdb *GostDatabase) DeleteObservedProperty(id interface{}) error {
return DeleteEntity(gdb, id, "observedproperty")
}