BenStullsBets
56 lines
2.1 KiB
Python
56 lines
2.1 KiB
Python
"""Stage 6 — assemble manifest entries (spec §3.6). Pure dict transforms over a
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loaded manifest dict; the caller does the json read/write. Idempotent by id so
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re-running earlier stages never clobbers authored labels."""
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from __future__ import annotations
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import copy
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def upsert_clip(manifest: dict, clip: dict) -> dict:
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"""Replace the clip with the same id, or append it. Returns a new manifest."""
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m = copy.deepcopy(manifest)
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clips = m.setdefault("clips", [])
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for i, c in enumerate(clips):
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if c["id"] == clip["id"]:
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clips[i] = clip
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return m
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clips.append(clip)
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return m
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def add_ring_scale(manifest: dict, scale_id: str, clip_id: str,
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after: str | None = None) -> dict:
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"""Insert a scale into ring.scales after the named scale (or append if `after`
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is None / not found). No-op if scale_id already present. Returns a new manifest."""
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m = copy.deepcopy(manifest)
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ring = m.setdefault("ring", {"scales": [], "transitions": []})
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scales = ring.setdefault("scales", [])
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if any(s["id"] == scale_id for s in scales):
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return m
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entry = {"id": scale_id, "clip_id": clip_id}
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idx = next((i for i, s in enumerate(scales) if s["id"] == after), None)
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if idx is None:
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scales.append(entry)
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else:
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scales.insert(idx + 1, entry)
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return m
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def rebuild_ring_edges(manifest: dict) -> dict:
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"""Rebuild ring.transitions to one placeholder entry per ring edge (N scales ->
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N edges incl. the wrap), preserving any existing model string for an edge.
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Returns a new manifest."""
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m = copy.deepcopy(manifest)
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ring = m.setdefault("ring", {"scales": [], "transitions": []})
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scales = ring.get("scales", [])
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existing = {t["file"]: t.get("model", "") for t in ring.get("transitions", [])}
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edges = []
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n = len(scales)
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for i in range(n):
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a, b = scales[i]["id"], scales[(i + 1) % n]["id"]
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file = f"transitions/{a}-{b}.mp4"
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edges.append({"file": file, "model": existing.get(file, "placeholder-zoom")})
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ring["transitions"] = edges
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return m
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