Add getMappedGraph and getFilteredGraph transforms - #33
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Predicate-based filtering and data-mapping transforms that preserve graph structure, closing the map/filter API gap with effect/graph (mapNodes/mapEdges/filterNodes/filterEdges). Dropping a node drops its incident edges and strips dangling parent/initial references, matching getSubgraph semantics. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01ATzbKkoDMTaWLqD8xZBQNv
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Forward graph-level direction and style in getMappedGraph, getFilteredGraph, getSubgraph, and getReversedGraph so transformed graphs keep their top-level drawing settings. Adds a changeset for the new transforms. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01ATzbKkoDMTaWLqD8xZBQNv
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Summary
Adds two structural transforms to
transforms.ts, rounding out the transform family (getSubgraph,getReversedGraph,getLineGraph,getFlattenedGraph):getMappedGraph(graph, { node?, edge? })— returns a new graph with node and/or edgedatatransformed by mapping functions. Structure (IDs, endpoints, hierarchy, ports, layout, weights) is fully preserved; onlydatachanges. Generic over the new data types (Graph<N, E, G, P>→Graph<N2, E2, G, P>), and returningundefinedclearsdata.getFilteredGraph(graph, { node?, edge? })— returns a new graph keeping only nodes/edges that pass the given predicates. Dropping a node also drops its incident edges and strips danglingparentId/initialNodeIdreferences, matchinggetSubgraphsemantics (reuses the same scoping helper).Chaining the two covers filter-then-map workflows.
getSubgraphremains the ID-list form;getFilteredGraphis the predicate form.Changes
src/transforms.ts: newgetMappedGraph,getFilteredGraph, and theirMappedGraphOptions/FilteredGraphOptionstypessrc/index.ts: export the new functions and option typestests/transforms.test.ts: 8 new tests (data mapping, structure preservation, incident-edge removal, dangling-reference stripping, predicate combinations, no-op copies)README.md: structural transforms list updatedTesting
pnpm vitest run— 1860 tests pass (82 files)pnpm typecheck— clean🤖 Generated with Claude Code
https://claude.ai/code/session_01ATzbKkoDMTaWLqD8xZBQNv
Generated by Claude Code