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| 1 | +// Copyright (c) HashiCorp, Inc. |
| 2 | +// SPDX-License-Identifier: MPL-2.0 |
| 3 | + |
| 4 | +package schema |
| 5 | + |
| 6 | +import ( |
| 7 | + "context" |
| 8 | + "fmt" |
| 9 | + |
| 10 | + "github.com/hashicorp/terraform-plugin-framework/attr" |
| 11 | + "github.com/hashicorp/terraform-plugin-framework/internal/fwschema" |
| 12 | + "github.com/hashicorp/terraform-plugin-framework/internal/fwtype" |
| 13 | + "github.com/hashicorp/terraform-plugin-framework/types" |
| 14 | + "github.com/hashicorp/terraform-plugin-framework/types/basetypes" |
| 15 | + "github.com/hashicorp/terraform-plugin-go/tftypes" |
| 16 | +) |
| 17 | + |
| 18 | +// Ensure the implementation satisifies the desired interfaces. |
| 19 | +var ( |
| 20 | + _ Block = ListNestedBlock{} |
| 21 | + _ fwschema.BlockWithValidateImplementation = ListNestedBlock{} |
| 22 | +) |
| 23 | + |
| 24 | +// ListNestedBlock represents a block that is a list of objects where |
| 25 | +// the object attributes can be fully defined, including further attributes |
| 26 | +// or blocks. When retrieving the value for this block, use types.List |
| 27 | +// as the value type unless the CustomType field is set. The NestedObject field |
| 28 | +// must be set. |
| 29 | +// |
| 30 | +// Prefer ListNestedAttribute over ListNestedBlock if the provider is |
| 31 | +// using protocol version 6. Nested attributes allow practitioners to configure |
| 32 | +// values directly with expressions. |
| 33 | +// |
| 34 | +// Terraform configurations configure this block repeatedly using curly brace |
| 35 | +// syntax without an equals (=) sign or [Dynamic Block Expressions]. |
| 36 | +// |
| 37 | +// # list of blocks with two elements |
| 38 | +// example_block { |
| 39 | +// nested_attribute = #... |
| 40 | +// } |
| 41 | +// example_block { |
| 42 | +// nested_attribute = #... |
| 43 | +// } |
| 44 | +// |
| 45 | +// Terraform configurations reference this block using expressions that |
| 46 | +// accept a list of objects or an element directly via square brace 0-based |
| 47 | +// index syntax: |
| 48 | +// |
| 49 | +// # first known object |
| 50 | +// .example_block[0] |
| 51 | +// # first known object nested_attribute value |
| 52 | +// .example_block[0].nested_attribute |
| 53 | +// |
| 54 | +// [Dynamic Block Expressions]: https://developer.hashicorp.com/terraform/language/expressions/dynamic-blocks |
| 55 | +type ListNestedBlock struct { |
| 56 | + // NestedObject is the underlying object that contains nested attributes or |
| 57 | + // blocks. This field must be set. |
| 58 | + // |
| 59 | + // Nested attributes that contain a dynamic type (i.e. DynamicAttribute) are not supported. |
| 60 | + // If underlying dynamic values are required, replace this block definition with |
| 61 | + // a DynamicAttribute. |
| 62 | + NestedObject NestedBlockObject |
| 63 | + |
| 64 | + // CustomType enables the use of a custom attribute type in place of the |
| 65 | + // default types.ListType of types.ObjectType. When retrieving data, the |
| 66 | + // basetypes.ListValuable associated with this custom type must be used in |
| 67 | + // place of types.List. |
| 68 | + CustomType basetypes.ListTypable |
| 69 | + |
| 70 | + // Description is used in various tooling, like the language server, to |
| 71 | + // give practitioners more information about what this attribute is, |
| 72 | + // what it's for, and how it should be used. It should be written as |
| 73 | + // plain text, with no special formatting. |
| 74 | + Description string |
| 75 | + |
| 76 | + // MarkdownDescription is used in various tooling, like the |
| 77 | + // documentation generator, to give practitioners more information |
| 78 | + // about what this attribute is, what it's for, and how it should be |
| 79 | + // used. It should be formatted using Markdown. |
| 80 | + MarkdownDescription string |
| 81 | + |
| 82 | + // DeprecationMessage defines warning diagnostic details to display when |
| 83 | + // practitioner configurations use this Attribute. The warning diagnostic |
| 84 | + // summary is automatically set to "Attribute Deprecated" along with |
| 85 | + // configuration source file and line information. |
| 86 | + // |
| 87 | + // Set this field to a practitioner actionable message such as: |
| 88 | + // |
| 89 | + // - "Configure other_attribute instead. This attribute will be removed |
| 90 | + // in the next major version of the provider." |
| 91 | + // - "Remove this attribute's configuration as it no longer is used and |
| 92 | + // the attribute will be removed in the next major version of the |
| 93 | + // provider." |
| 94 | + // |
| 95 | + // In Terraform 1.2.7 and later, this warning diagnostic is displayed any |
| 96 | + // time a practitioner attempts to configure a value for this attribute and |
| 97 | + // certain scenarios where this attribute is referenced. |
| 98 | + // |
| 99 | + // In Terraform 1.2.6 and earlier, this warning diagnostic is only |
| 100 | + // displayed when the Attribute is Required or Optional, and if the |
| 101 | + // practitioner configuration sets the value to a known or unknown value |
| 102 | + // (which may eventually be null). |
| 103 | + // |
| 104 | + // Across any Terraform version, there are no warnings raised for |
| 105 | + // practitioner configuration values set directly to null, as there is no |
| 106 | + // way for the framework to differentiate between an unset and null |
| 107 | + // configuration due to how Terraform sends configuration information |
| 108 | + // across the protocol. |
| 109 | + // |
| 110 | + // Additional information about deprecation enhancements for read-only |
| 111 | + // attributes can be found in: |
| 112 | + // |
| 113 | + // - https://github.com/hashicorp/terraform/issues/7569 |
| 114 | + // |
| 115 | + DeprecationMessage string |
| 116 | +} |
| 117 | + |
| 118 | +// ApplyTerraform5AttributePathStep returns the NestedObject field value if step |
| 119 | +// is ElementKeyInt, otherwise returns an error. |
| 120 | +func (b ListNestedBlock) ApplyTerraform5AttributePathStep(step tftypes.AttributePathStep) (interface{}, error) { |
| 121 | + _, ok := step.(tftypes.ElementKeyInt) |
| 122 | + |
| 123 | + if !ok { |
| 124 | + return nil, fmt.Errorf("cannot apply step %T to ListNestedBlock", step) |
| 125 | + } |
| 126 | + |
| 127 | + return b.NestedObject, nil |
| 128 | +} |
| 129 | + |
| 130 | +// Equal returns true if the given Block is ListNestedBlock |
| 131 | +// and all fields are equal. |
| 132 | +func (b ListNestedBlock) Equal(o fwschema.Block) bool { |
| 133 | + if _, ok := o.(ListNestedBlock); !ok { |
| 134 | + return false |
| 135 | + } |
| 136 | + |
| 137 | + return fwschema.BlocksEqual(b, o) |
| 138 | +} |
| 139 | + |
| 140 | +// GetDeprecationMessage returns the DeprecationMessage field value. |
| 141 | +func (b ListNestedBlock) GetDeprecationMessage() string { |
| 142 | + return b.DeprecationMessage |
| 143 | +} |
| 144 | + |
| 145 | +// GetDescription returns the Description field value. |
| 146 | +func (b ListNestedBlock) GetDescription() string { |
| 147 | + return b.Description |
| 148 | +} |
| 149 | + |
| 150 | +// GetMarkdownDescription returns the MarkdownDescription field value. |
| 151 | +func (b ListNestedBlock) GetMarkdownDescription() string { |
| 152 | + return b.MarkdownDescription |
| 153 | +} |
| 154 | + |
| 155 | +// GetNestedObject returns the NestedObject field value. |
| 156 | +func (b ListNestedBlock) GetNestedObject() fwschema.NestedBlockObject { |
| 157 | + return b.NestedObject |
| 158 | +} |
| 159 | + |
| 160 | +// GetNestingMode always returns BlockNestingModeList. |
| 161 | +func (b ListNestedBlock) GetNestingMode() fwschema.BlockNestingMode { |
| 162 | + return fwschema.BlockNestingModeList |
| 163 | +} |
| 164 | + |
| 165 | +// Type returns ListType of ObjectType or CustomType. |
| 166 | +func (b ListNestedBlock) Type() attr.Type { |
| 167 | + if b.CustomType != nil { |
| 168 | + return b.CustomType |
| 169 | + } |
| 170 | + |
| 171 | + return types.ListType{ |
| 172 | + ElemType: b.NestedObject.Type(), |
| 173 | + } |
| 174 | +} |
| 175 | + |
| 176 | +// ValidateImplementation contains logic for validating the |
| 177 | +// provider-defined implementation of the block to prevent unexpected |
| 178 | +// errors or panics. This logic runs during the GetProviderSchema RPC and |
| 179 | +// should never include false positives. |
| 180 | +func (b ListNestedBlock) ValidateImplementation(ctx context.Context, req fwschema.ValidateImplementationRequest, resp *fwschema.ValidateImplementationResponse) { |
| 181 | + if b.CustomType == nil && fwtype.ContainsCollectionWithDynamic(b.Type()) { |
| 182 | + resp.Diagnostics.Append(fwtype.BlockCollectionWithDynamicTypeDiag(req.Path)) |
| 183 | + } |
| 184 | +} |
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