/
filter.go
83 lines (67 loc) · 2.08 KB
/
filter.go
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package greenleaf
type operator string
const (
eqOperator = operator("$eq")
neOperator = operator("$ne")
gtOperator = operator("$gt")
gteOperator = operator("$gte")
ltOperator = operator("$lt")
lteOperator = operator("$lte")
inOperator = operator("$in")
existsOperator = operator("$exists")
ninOperator = operator("$nin")
)
// FilterDocument represents filter document.
type FilterDocument map[string]M
// M represents selector.
type M map[operator]any
// Eq creates a $eq query selector.
func Eq[T any](field string, value T) FilterDocument {
return createSelector(field, eqOperator, value)
}
// Ne creates a $ne query selector.
func Ne[T any](field string, value T) FilterDocument {
return createSelector(field, neOperator, value)
}
// Gt creates a $gt query selector.
func Gt[T any](field string, value T) FilterDocument {
return createSelector(field, gtOperator, value)
}
// Gte creates a $gte query selector.
func Gte[T any](field string, value T) FilterDocument {
return createSelector(field, gteOperator, value)
}
// Lt creates a $lt query selector.
func Lt[T any](field string, value T) FilterDocument {
return createSelector(field, ltOperator, value)
}
// Lte creates a $lte query selector.
func Lte[T any](field string, value T) FilterDocument {
return createSelector(field, lteOperator, value)
}
// Exists creates an $exists query selector.
func Exists(field string, value bool) FilterDocument {
return createSelector(field, existsOperator, value)
}
// In creates a $in query selector.
func In[T any](field string, value []T) FilterDocument {
return createSelector(field, inOperator, value)
}
// Nin creates a $nin query selector.
func Nin[T any](field string, value []T) FilterDocument {
return createSelector(field, ninOperator, value)
}
func createSelector(field string, operator operator, value any) FilterDocument {
return FilterDocument{
field: M{operator: value},
}
}
func Filter(docs ...FilterDocument) FilterDocument {
query := FilterDocument{}
for _, doc := range docs {
for k, v := range doc {
query[k] = v
}
}
return query
}