Three reversals had landed without the documentation following them, so the
docs described a pipeline that compresses its output, a schema with three
secondary indexes, and a browser that re-downloads the file on every visit.
None of those are true any more.
- Compression: the assembler stopped producing .gz when the databases began
shipping as .sqlite3. The deployment guide's "why no uncompressed database
can ship" section explained a guard that now exists for the opposite reason
— to keep .db, .gz and journals out, so .sqlite3 stays the only name.
- Indexes: the architecture printed a DDL with three CREATE INDEX statements
and a paragraph on the partial one. schema.go carries none.
- Persistence: "the download is repeated every visit ... has not been done"
was listed as an open risk after db-cache.js closed it. Replaced with the
ETag flow, the offline fallback, and the risks that did replace it.
Measured both transfers rather than scaling one from the other, which would
have been wrong: 2016 is 142 MB stored and 31 MB delivered, 2017 is 119 MB and
36 MB. The smaller database is the larger download, so neither figure follows
from the stored size.
Also corrects a CHUNK_BYTES reference to a module that no longer exists, the
238-289 MB per-dataset figure, two paths to web/src/lib/datasets.js, and the
CI step list, which omitted npm test and the post-deploy header check.
The two code comments that said the same outdated things go with them.
Every .ts becomes .js, every lang="ts" becomes lang-less, and the type
declarations go with them: types.ts held nothing but types, so it is
deleted outright.
Tooling follows. typescript, svelte-check, typescript-eslint and
@types/sql.js are uninstalled; tsconfig.json becomes jsconfig.json, which
still extends the generated SvelteKit config so $lib and $app resolve in
an editor; `npm run lint` is now ESLint alone, and CI's comment about it
covering the type check goes too.
What this gives up, stated plainly: a mistyped column name like
row.nguvan used to fail the build and now renders blank, and the
datasets.json-to-CONTENT cross-check is back to throwing at module load
rather than at compile time. The runtime guard for the latter is still
there and still throws loudly.
Two mechanical notes. The svelte/no-navigation-without-resolve rule
started flagging the footer's source link, which points at an off-site
article — without type information the rule can no longer tell an
external URL from a route, so that one line carries a disable comment.
And Vitest's include pattern had to follow the tests to .js.
Lint, 25 tests and the build all pass.
The app was a single-entry React SPA: one index.html that the assembler
copied to every dataset path, with a hand-rolled router resolving the
dataset from window.location and the title patched in at runtime because
one file had to serve every route.
SvelteKit prerenders a real page per route instead. The entry generator
in routes/[dataset]/+page.ts reads the same datasets.json the assembler
does, so the set of pages and the set of databases cannot drift apart,
and each dataset page ships its own <title> and description.
Everything framework-free moved across unchanged in behaviour and became
typed: the admission blocks, subject list, query classifier and SQL
presets. `Student` now mirrors the 22-column table, so a mistyped column
name fails the build rather than rendering blank.
Tailwind replaces the stylesheet. Theme tokens are CSS variables, which
keeps dark mode a single block of overrides rather than a `dark:` variant
on every class. The score tiers stay hand-written CSS: the class is
chosen at runtime from a score, and no utility generator can see that.
Adds the tests the frontend never had, over the three modules where a
silent wrong answer is possible — most importantly that toAscii here
folds exactly as ToAscii does in the parser, which is what makes
accent-insensitive search find anything.
The assembler stops copying index.html per dataset and checks that the
build prerendered each one instead. The database presence, raw-artifact
and idempotence guards are untouched.
Verified: 25 tests, ESLint and svelte-check clean, and a full
`assemble site` producing /thptqg/, /thptqg/2016/, /thptqg/2017/ and
404.html with absolute asset URLs. Not verified in a browser — this
machine has none.
Four of the 119 files in data/2016 publish one score column per subject
instead of a DIEM_THI sentence, and none of them was being read correctly.
The ĐH Công nghiệp Thực phẩm file puts a three-row ministry title block
above its header, so no header was recognised and the positional fallback
shifted every column by one: the serial number became so_bao_danh, the
exam number became ho_ten, the name became ngay_sinh, and the national ID
became the score cell. All 7,833 rows were unusable. The three ĐH Cần Thơ
files name an SBD column but no DIEM_THI, so they fell to the same
fallback: surname into ngay_sinh, given name into ten_cum_thi, birth date
into the score cell, and 12,152 candidates with no scores at all.
Both are now read by FormatSubjectColumns, which resolves identity and one
column per subject from the header. The header is searched for in the
first five rows, so a title block no longer hides it.
The Cần Thơ score columns are numbered rather than named. They follow the
order the exam was sat — each morning an essay paper, each afternoon a
multiple-choice one — which is what identifies them: columns 1/3/5/7
quantise to 0.25 and 2/4/6/8 do not, and each column's mean lands within
0.5 of the same subject's mean across the rest of the dataset. The
foreign language is filed under the subject its N1..N6 code names.
Gender now accepts the 0/1 encoding those files use: of the rows marked
1, 53% carry "Thị" in the name against 1% of those marked 0. Birth dates
in the compact ddmmyy form are expanded so the column holds one format.
A score of 0 is stored rather than dropped, recovering 302 real scores
that a JavaScript falsy check had been turning into NULL.
Row count falls by one, to 877,460: the removed row is the title line
"ĐƠN VỊ: / TRƯỜNG ĐẠI HỌC CÔNG NGHIỆP THỰC PHẨM TP. HỒ CHÍ MINH", which
had been stored as a student. The dataset has no duplicate exam numbers;
the three rows previously described as collapsing were that same file's
title and header lines being counted and then rejected.
Also drops behaviour that existed only to match the parser this one
replaced: the inert "SINH " header token, the untrimmed diem_thi cell, an
unreachable blank-row branch, and a cross-check test against a database
that can no longer exist. None of them changes output.
Verified by rebuilding both datasets: 877,460 and 861,068 rows, both
artifacts through the assembler's row and size guards, and the reader
fidelity suite unchanged across all 182 files.
The pipeline is now Go outside web/. differential-parity.mjs becomes
assembler/internal/verify, reachable as `assemble verify A B`. The port fixed a
real weakness: the JavaScript hashed each row's fields joined bare, so a value
shifted across a column boundary produced the same digest. A test now pins that.
The hub still rendered "Phiên bản cũ của trang 2017" above a permanently empty
list — it split datasets on id.includes("old"), and both such datasets are gone.
The heading and the filter are removed. index.html titled every page "THPT QG
2017", including 2016 and the hub, because one file is copied to every route;
the static title is now neutral and the app sets the dataset's own.
Dead code removed: the isOld2/containsOld branches in the stats block, which
only 2017-old2 could ever reach; SUBJECT_LABELS, DATASET_IDS and the unread
`short` subject field; an unused vite.svg and a favicon link to a file that
never existed; two unused CSS rules and --shadow-sm; site.Paths.Root.
Corrected comments that were confidently wrong rather than merely stale: the
reader claimed to be row-streaming when both implementations decode the whole
workbook into memory first, and the fidelity oracle still spoke of 299 input
files when it covers 182. Candidate counts in the hub now derive from
datasets.json instead of being written a second time as prose.
plans/ is emptied. The parity report it held was cited by docs/data-pipeline.md,
so the evidence that the recovered foreign-language scores are real — not the
citation, the four arguments themselves — is now inline there.
Verified: 2017 rebuilt after the writer change hashes identically to the build
before it.
The repository now reads as the pipeline it is: crawler fetches, parser
converts, assembler verifies and publishes, with data/ and web/ as the stores
they hand work through. go-parser is renamed parser now that there is no other.
The assembler replaces build-db.js and assemble-site.js. It compiles the
parser, builds and verifies each database, compresses it, runs the Vite build
and assembles _site — one command, and the only place that knows the order.
It also closes a real hole: nothing previously asserted that a database reached
the site. An empty staging directory assembled happily, so every page rendered,
every query 404d and CI stayed green. The row-count and size guards could not
catch that, since they only run when a database was built at all.
Removing Node from the root forced the dataset list out of web/src/datasets.js,
which the assembler cannot import. datasets.json is now the registry both sides
read — JSON because Go and the browser both parse it without a dependency —
while presentation stays in the web app, keyed by id and cross-checked against
the registry so a half-added dataset fails instead of half-working.
Guards verified by making each one fail: a missing database, and an expected
row count one higher than the truth.
tiennm99