|
| 1 | +package facade |
| 2 | + |
| 3 | +import ( |
| 4 | + "github.com/imulab/go-scim/pkg/v2/crud" |
| 5 | + "github.com/imulab/go-scim/pkg/v2/crud/expr" |
| 6 | + "github.com/imulab/go-scim/pkg/v2/prop" |
| 7 | + "github.com/imulab/go-scim/pkg/v2/spec" |
| 8 | + "reflect" |
| 9 | + "strconv" |
| 10 | + "strings" |
| 11 | + "time" |
| 12 | +) |
| 13 | + |
| 14 | +// Export exports the object as a prop.Resource. For each field and the corresponding path specified in the "scim" tag, |
| 15 | +// it creates a property with the field value at the specified path. |
| 16 | +func Export(obj interface{}, resourceType *spec.ResourceType) (*prop.Resource, error) { |
| 17 | + r := prop.NewResource(resourceType) |
| 18 | + if err := crud.Add(r, "schemas", resourceType.Schema().ID()); err != nil { |
| 19 | + return nil, err |
| 20 | + } |
| 21 | + if err := crud.Add(r, "meta.resourceType", resourceType.Name()); err != nil { |
| 22 | + return nil, err |
| 23 | + } |
| 24 | + |
| 25 | + exp := exporter{} |
| 26 | + forEachMapping(reflect.ValueOf(obj), func(field reflect.Value, path string) error { |
| 27 | + return exp.assign(r, field, path) |
| 28 | + }) |
| 29 | + |
| 30 | + return r, nil |
| 31 | +} |
| 32 | + |
| 33 | +type exporter struct{} |
| 34 | + |
| 35 | +func (f exporter) assign(r *prop.Resource, field reflect.Value, path string) error { |
| 36 | + if field.Kind() == reflect.Ptr { |
| 37 | + if field.IsNil() { |
| 38 | + return nil |
| 39 | + } |
| 40 | + return f.assign(r, field.Elem(), path) |
| 41 | + } |
| 42 | + |
| 43 | + head, err := expr.CompilePath(path) |
| 44 | + if err != nil { |
| 45 | + return err |
| 46 | + } |
| 47 | + |
| 48 | + nav := r.Navigator() |
| 49 | + |
| 50 | + for cur := head; cur != nil; cur = cur.Next() { |
| 51 | + switch { |
| 52 | + case cur.IsPath(): |
| 53 | + if err := f.stepIn(nav, cur.Token()); err != nil { |
| 54 | + return err |
| 55 | + } |
| 56 | + if cur.Next() == nil { |
| 57 | + if err := f.set(nav, field); err != nil { |
| 58 | + return err |
| 59 | + } |
| 60 | + } |
| 61 | + case cur.IsRootOfFilter(): |
| 62 | + if err := f.selectElem(nav, cur); err != nil { |
| 63 | + return err |
| 64 | + } |
| 65 | + default: |
| 66 | + return ErrSCIMPath |
| 67 | + } |
| 68 | + } |
| 69 | + |
| 70 | + return nil |
| 71 | +} |
| 72 | + |
| 73 | +func (f exporter) stepIn(nav prop.Navigator, path string) error { |
| 74 | + nav.Add(map[string]interface{}{path: nil}) |
| 75 | + nav.Dot(path) |
| 76 | + return nav.Error() |
| 77 | +} |
| 78 | + |
| 79 | +func (f exporter) selectElem(nav prop.Navigator, filter *expr.Expression) error { |
| 80 | + nav.Where(func(child prop.Property) bool { |
| 81 | + ok, _ := crud.EvaluateExpressionOnProperty(child, filter) |
| 82 | + return ok |
| 83 | + }) |
| 84 | + if !nav.HasError() { |
| 85 | + return nil |
| 86 | + } |
| 87 | + |
| 88 | + // Navigator errors because it didn't find such element, clear the |
| 89 | + // error and create it! |
| 90 | + nav.ClearError() |
| 91 | + |
| 92 | + filterPropValues := map[string]string{} |
| 93 | + if err := f.collectLeafProps(filter, filterPropValues); err != nil { |
| 94 | + return err |
| 95 | + } |
| 96 | + |
| 97 | + complexData := map[string]interface{}{} |
| 98 | + for k, v := range filterPropValues { |
| 99 | + attr := nav.Current().Attribute().DeriveElementAttribute().SubAttributeForName(k) |
| 100 | + switch attr.Type() { |
| 101 | + case spec.TypeString, spec.TypeReference, spec.TypeDateTime, spec.TypeBinary: |
| 102 | + complexData[k] = v |
| 103 | + case spec.TypeInteger: |
| 104 | + i, err := strconv.ParseInt(v, 10, 64) |
| 105 | + if err != nil { |
| 106 | + return err |
| 107 | + } |
| 108 | + complexData[k] = i |
| 109 | + case spec.TypeDecimal: |
| 110 | + f, err := strconv.ParseFloat(v, 64) |
| 111 | + if err != nil { |
| 112 | + return err |
| 113 | + } |
| 114 | + complexData[k] = f |
| 115 | + case spec.TypeBoolean: |
| 116 | + b, err := strconv.ParseBool(v) |
| 117 | + if err != nil { |
| 118 | + return err |
| 119 | + } |
| 120 | + complexData[k] = b |
| 121 | + default: |
| 122 | + panic("unexpected type") |
| 123 | + } |
| 124 | + } |
| 125 | + |
| 126 | + nav.Add(complexData) |
| 127 | + if nav.HasError() { |
| 128 | + return nav.Error() |
| 129 | + } |
| 130 | + |
| 131 | + nav.Where(func(child prop.Property) bool { |
| 132 | + ok, _ := crud.EvaluateExpressionOnProperty(child, filter) |
| 133 | + return ok |
| 134 | + }) |
| 135 | + return nav.Error() |
| 136 | +} |
| 137 | + |
| 138 | +func (f exporter) collectLeafProps(root *expr.Expression, collector map[string]string) error { |
| 139 | + if root.IsOperator() { |
| 140 | + if root.Token() != expr.And && root.Token() != expr.Eq { |
| 141 | + return ErrDisallowedOperator |
| 142 | + } |
| 143 | + } |
| 144 | + |
| 145 | + if root.IsLogicalOperator() { |
| 146 | + if err := f.collectLeafProps(root.Left(), collector); err != nil { |
| 147 | + return err |
| 148 | + } |
| 149 | + return f.collectLeafProps(root.Right(), collector) |
| 150 | + } |
| 151 | + |
| 152 | + if root.IsRelationalOperator() { |
| 153 | + k := root.Left().Token() |
| 154 | + v := strings.Trim(root.Right().Token(), "\"") |
| 155 | + collector[k] = v |
| 156 | + return nil |
| 157 | + } |
| 158 | + |
| 159 | + panic("unreachable code") |
| 160 | +} |
| 161 | + |
| 162 | +func (f exporter) set(nav prop.Navigator, field reflect.Value) error { |
| 163 | + attr := nav.Current().Attribute() |
| 164 | + |
| 165 | + if err := typeCheck(attr, field.Type()); err != nil { |
| 166 | + return err |
| 167 | + } |
| 168 | + |
| 169 | + switch field.Kind() { |
| 170 | + case reflect.String: |
| 171 | + nav.Replace(field.String()) |
| 172 | + return nav.Error() |
| 173 | + case reflect.Int64: |
| 174 | + switch attr.Type() { |
| 175 | + case spec.TypeInteger: |
| 176 | + nav.Replace(field.Int()) |
| 177 | + return nav.Error() |
| 178 | + case spec.TypeDateTime: |
| 179 | + nav.Replace(time.Unix(field.Int(), 0).UTC().Format(spec.ISO8601)) |
| 180 | + return nav.Error() |
| 181 | + } |
| 182 | + case reflect.Float64: |
| 183 | + nav.Replace(field.Float()) |
| 184 | + return nav.Error() |
| 185 | + case reflect.Bool: |
| 186 | + nav.Replace(field.Bool()) |
| 187 | + return nav.Error() |
| 188 | + case reflect.Slice: |
| 189 | + if attr.MultiValued() { |
| 190 | + var list []interface{} |
| 191 | + for i := 0; i < field.Len(); i++ { |
| 192 | + list = append(list, field.Index(i).Interface()) |
| 193 | + } |
| 194 | + nav.Replace(list) |
| 195 | + return nav.Error() |
| 196 | + } |
| 197 | + } |
| 198 | + |
| 199 | + return ErrInputType |
| 200 | +} |
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