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1cbec06 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 | """CanonicalBuilder — builder pattern for constructing CanonicalDocuments.
Usage:
builder = CanonicalBuilder("doc_001", InputType.IMAGE, "page.png")
page = builder.add_page(page_id="p1", width=2480, height=3508)
region = page.add_text_region("tb1", geometry=geo, provenance=prov)
line = region.add_line("tl1", geometry=geo, provenance=prov)
line.add_word("w1", text="Hello", geometry=geo, provenance=prov, confidence=0.95)
doc = builder.build()
"""
from __future__ import annotations
from typing import Any
from src.app.domain.models import (
AltoReadiness,
CanonicalDocument,
Geometry,
Hyphenation,
NonTextRegion,
Page,
PageXmlReadiness,
Provenance,
Source,
TextLine,
TextRegion,
Word,
)
from src.app.domain.models.status import (
BlockRole,
InputType,
NonTextKind,
ReadinessLevel,
)
class WordBuilder:
"""Accumulates word data before the line is finalized."""
def __init__(
self,
word_id: str,
text: str,
geometry: Geometry,
provenance: Provenance,
*,
confidence: float | None = None,
lang: str | None = None,
hyphenation: Hyphenation | None = None,
normalized_text: str | None = None,
style_refs: list[str] | None = None,
metadata: dict[str, Any] | None = None,
) -> None:
self._data = {
"id": word_id,
"text": text,
"geometry": geometry,
"provenance": provenance,
"confidence": confidence,
"lang": lang,
"hyphenation": hyphenation,
"normalized_text": normalized_text,
"style_refs": style_refs or [],
"metadata": metadata,
}
def build(self) -> Word:
return Word(**self._data)
class LineBuilder:
"""Accumulates words for a single line."""
def __init__(
self,
line_id: str,
geometry: Geometry,
provenance: Provenance,
*,
confidence: float | None = None,
lang: str | None = None,
metadata: dict[str, Any] | None = None,
) -> None:
self._line_id = line_id
self._geometry = geometry
self._provenance = provenance
self._confidence = confidence
self._lang = lang
self._metadata = metadata
self._words: list[WordBuilder] = []
def add_word(
self,
word_id: str,
text: str,
geometry: Geometry,
provenance: Provenance,
*,
confidence: float | None = None,
lang: str | None = None,
hyphenation: Hyphenation | None = None,
normalized_text: str | None = None,
style_refs: list[str] | None = None,
metadata: dict[str, Any] | None = None,
) -> WordBuilder:
wb = WordBuilder(
word_id,
text,
geometry,
provenance,
confidence=confidence,
lang=lang,
hyphenation=hyphenation,
normalized_text=normalized_text,
style_refs=style_refs,
metadata=metadata,
)
self._words.append(wb)
return wb
def build(self) -> TextLine:
if not self._words:
raise ValueError(f"Line {self._line_id} has no words")
return TextLine(
id=self._line_id,
geometry=self._geometry,
provenance=self._provenance,
confidence=self._confidence,
lang=self._lang,
words=[w.build() for w in self._words],
metadata=self._metadata,
)
class RegionBuilder:
"""Accumulates lines for a text region (block)."""
def __init__(
self,
region_id: str,
geometry: Geometry,
provenance: Provenance,
*,
role: BlockRole | None = None,
confidence: float | None = None,
lang: str | None = None,
metadata: dict[str, Any] | None = None,
) -> None:
self._region_id = region_id
self._geometry = geometry
self._provenance = provenance
self._role = role
self._confidence = confidence
self._lang = lang
self._metadata = metadata
self._lines: list[LineBuilder] = []
def add_line(
self,
line_id: str,
geometry: Geometry,
provenance: Provenance,
*,
confidence: float | None = None,
lang: str | None = None,
metadata: dict[str, Any] | None = None,
) -> LineBuilder:
lb = LineBuilder(
line_id,
geometry,
provenance,
confidence=confidence,
lang=lang,
metadata=metadata,
)
self._lines.append(lb)
return lb
def build(self) -> TextRegion:
if not self._lines:
raise ValueError(f"Region {self._region_id} has no lines")
return TextRegion(
id=self._region_id,
role=self._role,
geometry=self._geometry,
provenance=self._provenance,
confidence=self._confidence,
lang=self._lang,
lines=[ln.build() for ln in self._lines],
metadata=self._metadata,
)
class PageBuilder:
"""Accumulates regions for a single page."""
def __init__(
self,
page_id: str,
page_index: int,
width: float,
height: float,
) -> None:
self._page_id = page_id
self._page_index = page_index
self._width = width
self._height = height
self._text_regions: list[RegionBuilder] = []
self._non_text_regions: list[NonTextRegion] = []
self._reading_order: list[str] = []
self._warnings: list[str] = []
self._metadata: dict[str, Any] | None = None
def add_text_region(
self,
region_id: str,
geometry: Geometry,
provenance: Provenance,
*,
role: BlockRole | None = None,
confidence: float | None = None,
lang: str | None = None,
metadata: dict[str, Any] | None = None,
) -> RegionBuilder:
rb = RegionBuilder(
region_id,
geometry,
provenance,
role=role,
confidence=confidence,
lang=lang,
metadata=metadata,
)
self._text_regions.append(rb)
self._reading_order.append(region_id)
return rb
def add_non_text_region(
self,
region_id: str,
kind: NonTextKind,
geometry: Geometry,
provenance: Provenance,
*,
confidence: float | None = None,
metadata: dict[str, Any] | None = None,
) -> None:
self._non_text_regions.append(
NonTextRegion(
id=region_id,
kind=kind,
geometry=geometry,
provenance=provenance,
confidence=confidence,
metadata=metadata,
)
)
def add_warning(self, warning: str) -> None:
self._warnings.append(warning)
def set_metadata(self, metadata: dict[str, Any]) -> None:
self._metadata = metadata
def build(self) -> Page:
return Page(
id=self._page_id,
page_index=self._page_index,
width=self._width,
height=self._height,
alto_readiness=AltoReadiness(
level=ReadinessLevel.NONE, missing=["word_text"]
),
page_readiness=PageXmlReadiness(
level=ReadinessLevel.NONE, missing=["word_text"]
),
reading_order=self._reading_order,
text_regions=[r.build() for r in self._text_regions],
non_text_regions=self._non_text_regions,
warnings=self._warnings,
metadata=self._metadata,
)
class CanonicalBuilder:
"""Top-level builder for constructing a CanonicalDocument."""
def __init__(
self,
document_id: str,
input_type: InputType,
filename: str | None = None,
*,
mime_type: str | None = None,
checksum: str | None = None,
metadata: dict[str, Any] | None = None,
) -> None:
self._document_id = document_id
self._source = Source(
input_type=input_type,
filename=filename,
mime_type=mime_type,
checksum=checksum,
)
self._pages: list[PageBuilder] = []
self._metadata = metadata
def add_page(
self,
page_id: str,
page_index: int,
width: float,
height: float,
) -> PageBuilder:
pb = PageBuilder(page_id, page_index, width, height)
self._pages.append(pb)
return pb
def build(self) -> CanonicalDocument:
"""Build and validate the CanonicalDocument.
Raises pydantic.ValidationError if the resulting document is invalid.
"""
if not self._pages:
raise ValueError("Document must have at least one page")
return CanonicalDocument(
document_id=self._document_id,
source=self._source,
pages=[p.build() for p in self._pages],
metadata=self._metadata,
)
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