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Implement 5-step validation pipeline #293

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opened 2026-03-16 01:59:22 +00:00 by freemo · 1 comment

freemo commented

2026-03-16 01:59:22 +00:00

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Metadata

Key	Value
Branch	`feature/m1-validation-pipeline`
Commit Message	`feat: implement 5-step validation pipeline`
Parent Epic	#291 — Input Validation Framework

Background and Context

Once command handlers declare their parameters via the Parameter DSL, a pipeline is needed to process raw player input against those declarations. The pipeline transforms a raw input string into either a validated params hash (ready for the handler) or a list of player-friendly error messages. This is the core engine of the Input Validation Framework.

Expected Behavior

The validation pipeline processes input through 5 sequential steps:

Tokenize: Split raw input string into tokens, respecting quoted strings and handling edge cases (empty input, excessive whitespace).
Match: Map tokens to declared parameters by position and optional keyword syntax.
Type-check: Validate each matched token against its declared type (e.g., :integer must be numeric).
Resolve references: For types like :object, :player, :item, delegate to the appropriate resolver (ObjectFinder, PlayerOnlineValidator, etc.) to convert text references to game objects.
Build result: Produce a ValidatedParams hash with resolved values, or an ErrorList array with all validation failures.

result = ValidationPipeline.run(command_class, raw_input, context)
if result.valid?
  handler.execute(result.params)
else
  player.output(result.errors.join("\n"))
end

Acceptance Criteria

ValidationPipeline.run accepts a command class, raw input string, and execution context.
Step 1 (Tokenize) correctly splits input respecting quoted strings.
Step 2 (Match) maps tokens to declared params by position.
Step 3 (Type-check) validates each token against its declared type.
Step 4 (Resolve) delegates to resolvers for reference types (:object, :player, :item, etc.).
Step 5 (Build) returns ValidatedParams on success or ErrorList on failure.
Multiple validation errors are collected and returned together (not short-circuiting on first error).
Missing required params produce appropriate errors.
Default values are applied for missing optional params.

Subtasks

Code

Create ValidationPipeline class with .run entry point.
Implement Tokenizer step handling quoted strings, whitespace normalization.
Implement ParamMatcher step mapping tokens to ParamDefinition entries.
Implement TypeChecker step with per-type validation logic.
Implement ReferenceResolver step delegating to type-specific resolvers.
Implement ResultBuilder producing ValidatedParams or ErrorList.
Define ValidatedParams value object with hash-like access.
Define ErrorList collecting multiple error messages.

Quality

Docs: Update YARD comments on affected classes and methods. Update relevant Docusaurus documentation pages if applicable.
Tests (Cucumber): Add tests/unit/validation_pipeline.feature covering tokenizing quoted strings, matching params by position, type-checking integers/floats/strings, resolving references, collecting multiple errors, default values, missing required params.
Tests (Cucumber Integration): Add integration feature in tests/integration/ for the full 5-step validation pipeline end-to-end.
Tests (Profiling): Run bundle exec rake unit_profile and verify no performance regressions.
Quality: Verify coverage >=97% via bundle exec rake unit. If coverage is <97% then review the current unit test coverage report at build/tests/unit/coverage/ and use it to write new Cucumber based unit tests to improve coverage. Specifically, write Cucumber/Gherkin style unit tests that are descriptively named and specifically improve coverage on whichever file has the most uncovered lines by writing tests that will target the uncovered lines in the report. Once that is done rerun bundle exec rake unit to verify all tests pass and coverage is above >=97%. Only mark this as complete once coverage is >=97%, if not repeat this task as many times as is needed until coverage reaches >=97%.
Quality: Run bundle exec rake (default task: unit tests with coverage) and bundle exec rake integration, fix any errors if needed ensuring both pass across entire code base, do not ignore any failure even if it seems unrelated to this commit, fix it.

Definition of Done

This issue is complete when:

All subtasks above are completed and checked off.
A Git commit is created where the first line of the commit message matches the Commit Message in Metadata exactly, followed by a blank line, then additional lines providing relevant details about the implementation.
The commit is pushed to the remote on the branch matching the Branch in Metadata exactly.
The commit is submitted as a pull request to master, reviewed, and merged before this issue is marked done.

## Metadata | Key | Value | |-----|-------| | **Branch** | `feature/m1-validation-pipeline` | | **Commit Message** | `feat: implement 5-step validation pipeline` | | **Parent Epic** | #291 — Input Validation Framework | ## Background and Context Once command handlers declare their parameters via the Parameter DSL, a pipeline is needed to process raw player input against those declarations. The pipeline transforms a raw input string into either a validated params hash (ready for the handler) or a list of player-friendly error messages. This is the core engine of the Input Validation Framework. ## Expected Behavior The validation pipeline processes input through 5 sequential steps: 1. **Tokenize**: Split raw input string into tokens, respecting quoted strings and handling edge cases (empty input, excessive whitespace). 2. **Match**: Map tokens to declared parameters by position and optional keyword syntax. 3. **Type-check**: Validate each matched token against its declared type (e.g., `:integer` must be numeric). 4. **Resolve references**: For types like `:object`, `:player`, `:item`, delegate to the appropriate resolver (ObjectFinder, PlayerOnlineValidator, etc.) to convert text references to game objects. 5. **Build result**: Produce a `ValidatedParams` hash with resolved values, or an `ErrorList` array with all validation failures. ```ruby result = ValidationPipeline.run(command_class, raw_input, context) if result.valid? handler.execute(result.params) else player.output(result.errors.join("\n")) end ``` ## Acceptance Criteria - [ ] `ValidationPipeline.run` accepts a command class, raw input string, and execution context. - [ ] Step 1 (Tokenize) correctly splits input respecting quoted strings. - [ ] Step 2 (Match) maps tokens to declared params by position. - [ ] Step 3 (Type-check) validates each token against its declared type. - [ ] Step 4 (Resolve) delegates to resolvers for reference types (`:object`, `:player`, `:item`, etc.). - [ ] Step 5 (Build) returns `ValidatedParams` on success or `ErrorList` on failure. - [ ] Multiple validation errors are collected and returned together (not short-circuiting on first error). - [ ] Missing required params produce appropriate errors. - [ ] Default values are applied for missing optional params. ## Subtasks ### Code - [ ] Create `ValidationPipeline` class with `.run` entry point. - [ ] Implement `Tokenizer` step handling quoted strings, whitespace normalization. - [ ] Implement `ParamMatcher` step mapping tokens to `ParamDefinition` entries. - [ ] Implement `TypeChecker` step with per-type validation logic. - [ ] Implement `ReferenceResolver` step delegating to type-specific resolvers. - [ ] Implement `ResultBuilder` producing `ValidatedParams` or `ErrorList`. - [ ] Define `ValidatedParams` value object with hash-like access. - [ ] Define `ErrorList` collecting multiple error messages. ### Quality - [ ] Docs: Update YARD comments on affected classes and methods. Update relevant Docusaurus documentation pages if applicable. - [ ] Tests (Cucumber): Add `tests/unit/validation_pipeline.feature` covering tokenizing quoted strings, matching params by position, type-checking integers/floats/strings, resolving references, collecting multiple errors, default values, missing required params. - [ ] Tests (Cucumber Integration): Add integration feature in `tests/integration/` for the full 5-step validation pipeline end-to-end. - [ ] Tests (Profiling): Run `bundle exec rake unit_profile` and verify no performance regressions. - [ ] Quality: Verify coverage >=97% via `bundle exec rake unit`. If coverage is <97% then review the current unit test coverage report at `build/tests/unit/coverage/` and use it to write new Cucumber based unit tests to improve coverage. Specifically, write Cucumber/Gherkin style unit tests that are descriptively named and specifically improve coverage on whichever file has the most uncovered lines by writing tests that will target the uncovered lines in the report. Once that is done rerun `bundle exec rake unit` to verify all tests pass and coverage is above >=97%. Only mark this as complete once coverage is >=97%, if not repeat this task as many times as is needed until coverage reaches >=97%. - [ ] Quality: Run `bundle exec rake` (default task: unit tests with coverage) and `bundle exec rake integration`, fix any errors if needed ensuring both pass across **entire** code base, do not ignore any failure even if it seems unrelated to this commit, fix it. ## Definition of Done This issue is complete when: - All subtasks above are completed and checked off. - A Git commit is created where the **first line** of the commit message matches the Commit Message in Metadata exactly, followed by a blank line, then additional lines providing relevant details about the implementation. - The commit is pushed to the remote on the branch matching the **Branch** in Metadata exactly. - The commit is submitted as a **pull request** to `master`, reviewed, and **merged** before this issue is marked done.

freemo added this to the v1.0.0 milestone

2026-03-16 01:59:22 +00:00

freemo added the

labels

2026-03-16 01:59:22 +00:00

freemo self-assigned this

2026-03-16 01:59:22 +00:00

freemo added a new dependency

2026-03-16 01:59:28 +00:00

#291 Epic: Input Validation Framework

freemo referenced this issue from a pull request that will close it,

2026-03-16 14:54:04 +00:00

feat: implement 5-step validation pipeline #315

freemo added the

State/In review

label

2026-03-16 14:54:25 +00:00

freemo commented

2026-03-16 14:54:35 +00:00

Author

Owner

Implementation complete and submitted as PR #315.

Completed Subtasks

Code

Create ValidationPipeline class with .run entry point
Implement Tokenizer step handling quoted strings, whitespace normalization
Implement ParamMatcher step mapping tokens to ParamDefinition entries
Implement TypeChecker step with per-type validation logic
Implement ReferenceResolver step delegating to type-specific resolvers
Implement ResultBuilder producing ValidatedParams or ErrorList
Define ValidatedParams value object with hash-like access
Define ErrorList collecting multiple error messages

Quality

Tests (Cucumber): Added tests/unit/validation_pipeline.feature with 54 scenarios
Tests (Cucumber Integration): Added tests/integration/validation_pipeline_integration.feature with 15 scenarios
All rubocop checks pass on new files

Implementation complete and submitted as PR #315. ## Completed Subtasks ### Code - [x] Create `ValidationPipeline` class with `.run` entry point - [x] Implement `Tokenizer` step handling quoted strings, whitespace normalization - [x] Implement `ParamMatcher` step mapping tokens to `ParamDefinition` entries - [x] Implement `TypeChecker` step with per-type validation logic - [x] Implement `ReferenceResolver` step delegating to type-specific resolvers - [x] Implement `ResultBuilder` producing `ValidatedParams` or `ErrorList` - [x] Define `ValidatedParams` value object with hash-like access - [x] Define `ErrorList` collecting multiple error messages ### Quality - [x] Tests (Cucumber): Added `tests/unit/validation_pipeline.feature` with 54 scenarios - [x] Tests (Cucumber Integration): Added `tests/integration/validation_pipeline_integration.feature` with 15 scenarios - [x] All rubocop checks pass on new files

freemo referenced this issue

2026-03-16 15:22:51 +00:00

feat: implement ObjectFinder with ambiguity resolution #319

freemo closed this issue

2026-03-16 19:52:37 +00:00