migrations: add version tables for all data sources

lib/table_names/jmdict.dart

@@ -1,4 +1,5 @@
 abstract class JMdictTableNames {
+  static const String version = 'JMdict_Version';
   static const String entry = 'JMdict_Entry';
   static const String kanjiElement = 'JMdict_KanjiElement';
   static const String kanjiInfo = 'JMdict_KanjiElementInfo';
@@ -20,6 +21,7 @@ abstract class JMdictTableNames {
   static const String senseSeeAlso = 'JMdict_SenseSeeAlso';
 
   static Set<String> get allTables => {
+    version,
     entry,
     kanjiElement,
     kanjiInfo,

lib/table_names/kanjidic.dart

@@ -1,4 +1,5 @@
 abstract class KANJIDICTableNames {
+  static const String version = 'KANJIDIC_Version';
   static const String character = 'KANJIDIC_Character';
   static const String radicalName = 'KANJIDIC_RadicalName';
   static const String codepoint = 'KANJIDIC_Codepoint';
@@ -17,6 +18,7 @@ abstract class KANJIDICTableNames {
   static const String nanori = 'KANJIDIC_Nanori';
 
   static Set<String> get allTables => {
+    version,
     character,
     radicalName,
     codepoint,

lib/table_names/radkfile.dart

@@ -1,5 +1,6 @@
 abstract class RADKFILETableNames {
+  static const String version = 'RADKFILE_Version';
   static const String radkfile = 'RADKFILE';
 
-  static Set<String> get allTables => {radkfile};
+  static Set<String> get allTables => {version, radkfile};
 }

lib/table_names/tanos_jlpt.dart

@@ -1,5 +1,6 @@
 abstract class TanosJLPTTableNames {
+  static const String version = 'JMdict_JLPT_Version';
   static const String jlptTag = 'JMdict_JLPTTag';
 
-  static Set<String> get allTables => {jlptTag};
+  static Set<String> get allTables => {version, jlptTag};
 }

migrations/0001_JMDict.sql

@@ -1,3 +1,16 @@
+CREATE TABLE "JMdict_Version" (
+  "version" VARCHAR(10) PRIMARY KEY NOT NULL,
+  "date" DATE NOT NULL,
+  "hash" VARCHAR(64) NOT NULL
+) WITHOUT ROWID;
+
+CREATE TRIGGER "JMdict_Version_SingleRow"
+BEFORE INSERT ON "JMdict_Version"
+WHEN (SELECT COUNT(*) FROM "JMdict_Version") >= 1
+BEGIN
+    SELECT RAISE(FAIL, 'Only one row allowed in JMdict_Version');
+END;
+
 CREATE TABLE "JMdict_InfoDialect" (
   "id" VARCHAR(4) PRIMARY KEY NOT NULL,
   "description" TEXT NOT NULL

migrations/0004_JMDict_tanos_jlpt_tags.sql

@@ -1,3 +1,16 @@
+CREATE TABLE "JMdict_JLPT_Version" (
+  "version" VARCHAR(10) PRIMARY KEY NOT NULL,
+  "date" DATE NOT NULL,
+  "hash" VARCHAR(64) NOT NULL
+) WITHOUT ROWID;
+
+CREATE TRIGGER "JMdict_JLPT_Version_SingleRow"
+BEFORE INSERT ON "JMdict_JLPT_Version"
+WHEN (SELECT COUNT(*) FROM "JMdict_JLPT_Version") >= 1
+BEGIN
+    SELECT RAISE(FAIL, 'Only one row allowed in JMdict_JLPT_Version');
+END;
+
 CREATE TABLE "JMdict_JLPTTag" (
   "entryId" INTEGER NOT NULL,
   "jlptLevel" CHAR(2) NOT NULL CHECK ("jlptLevel" in ('N5', 'N4', 'N3', 'N2', 'N1')),

migrations/0006_RADKFILE.sql

@@ -1,3 +1,16 @@
+CREATE TABLE "RADKFILE_Version" (
+  "version" VARCHAR(10) PRIMARY KEY NOT NULL,
+  "date" DATE NOT NULL,
+  "hash" VARCHAR(64) NOT NULL
+) WITHOUT ROWID;
+
+CREATE TRIGGER "RADKFILE_Version_SingleRow"
+BEFORE INSERT ON "RADKFILE_Version"
+WHEN (SELECT COUNT(*) FROM "RADKFILE_Version") >= 1
+BEGIN
+    SELECT RAISE(FAIL, 'Only one row allowed in RADKFILE_Version');
+END;
+
 CREATE TABLE "RADKFILE" (
   "kanji" CHAR(1) NOT NULL,
   "radical" CHAR(1) NOT NULL,

migrations/0007_KANJIDIC2.sql

@@ -1,3 +1,16 @@
+CREATE TABLE "KANJIDIC_Version" (
+  "version" VARCHAR(10) PRIMARY KEY NOT NULL,
+  "date" DATE NOT NULL,
+  "hash" VARCHAR(64) NOT NULL
+) WITHOUT ROWID;
+
+CREATE TRIGGER "KANJIDIC_Version_SingleRow"
+BEFORE INSERT ON "KANJIDIC_Version"
+WHEN (SELECT COUNT(*) FROM "KANJIDIC_Version") >= 1
+BEGIN
+    SELECT RAISE(FAIL, 'Only one row allowed in KANJIDIC_Version');
+END;
+
 CREATE TABLE "KANJIDIC_Character" (
   "literal" CHAR(1) NOT NULL PRIMARY KEY,
   "grade" INTEGER CHECK ("grade" BETWEEN 1 AND 10),