i commit the files

.eslintrc.yml

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+env:
+  es6: true
+  node: true
+extends: 'eslint:recommended'
+parserOptions:
+  ecmaVersion: 2018
+  sourceType: module
+rules:
+  indent:
+    - error
+    - tab
+  linebreak-style:
+    - error
+    - unix
+  quotes:
+    - error
+    - double
+  semi:
+    - error
+    - never
+  no-console:
+    - 0

.gitignore

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+node_modules/

bin/imessages

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+#!/usr/bin/env -S node -r esm
+import {homedir} from "os"
+import path from "path"
+import Knex from "knex"
+import yargs from "yargs"
+
+let applepoch = new Date("2001-01-01").getTime()
+
+let convertAppleDateToIsoDate = date =>
+	new Date(applepoch + date / 1000000).toISOString()
+
+// let convertIsoDateToAppleDate = date =>
+// 	new Date(date - applepoch).getTime() * 1000000
+
+// The file is always in the same place, and while it would be good to be able
+// to take another database other than the live one (one you’ve backed up, or
+let databasePath = path.resolve(
+	homedir(),
+	"Library",
+	"Messages",
+	"chat.db"
+)
+
+let knex = Knex({
+	client: "sqlite3",
+	useNullAsDefault: true,
+	connection: {
+		filename: databasePath
+	}
+})
+
+let get = field => item => item[field]
+
+let getId = get("id")
+
+yargs
+	.command({
+		command: "extract <handle> [name] [me]",
+		describe: "extract messages for a handle",
+		// aliases: ["$0"],
+		builder (yargs) {
+			return yargs
+				.positional(
+					"handle",
+					{
+						describe: "the handle whümfs messages to extract",
+						type: "string"
+					}
+				)
+				.positional(
+					"name",
+					{
+						describe: "the name to use for `handle`",
+						type: "string"
+					}
+				)
+				.positional(
+					"me",
+					{
+						describe: "the name to use for `me`",
+						type: "string",
+						default: "me"
+					}
+				)
+		},
+		handler: extract
+	})
+	.command({
+		command: "list-handles",
+		aliases: ["handles"],
+		describe: "list handles (like, contacts) from the database",
+		async handler () {
+			await knex
+				.select("*")
+				.from("handle")
+				.map(getId)
+				.then(handles => handles.forEach(handle => console.info(handle)))
+			process.exit()
+		}
+	})
+	.demandCommand(1, "you gotta chose a command")
+	.help()
+	.wrap(yargs.terminalWidth())
+	.argv
+
+async function extract (argv) {
+	let handle = argv.handle.trim()
+
+	let messages = await knex
+		.select([
+			"text",
+			"is_from_me",
+			"date",
+			"service",
+		])
+		.from("message")
+		.whereIn(
+			"handle_id",
+			knex
+				.select("ROWID")
+				.from("handle")
+				.where({
+					id: handle
+				})
+		)
+		.orderBy("date", "asc")
+		.then(messages => {
+			messages.forEach(message => {
+				message.date = convertAppleDateToIsoDate(message.date)
+				message.from = message.is_from_me ? argv.me : argv.name
+				message.to = message.is_from_me ? argv.name : argv.me
+				delete message.is_from_me
+			})
+
+			return messages
+
+		})
+
+	console.info(JSON.stringify(messages, 0, "\t"))
+	process.exit()
+}

index.js

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+#!/usr/bin/env -S node -r esm
+import {homedir} from "os"
+import path from "path"
+import Knex from "knex"
+import yargs from "yargs"
+
+let applepoch = new Date("2001-01-01").getTime()
+
+let convertAppleDateToIsoDate = date =>
+	new Date(applepoch + date / 1000000).toISOString()
+
+// let convertIsoDateToAppleDate = date =>
+// 	new Date(date - applepoch).getTime() * 1000000
+
+// The file is always in the same place, and while it would be good to be able
+// to take another database other than the live one (one you’ve backed up, or
+let databasePath = path.resolve(
+	homedir(),
+	"Library",
+	"Messages",
+	"chat.db"
+)
+
+let knex = Knex({
+	client: "sqlite3",
+	useNullAsDefault: true,
+	connection: {
+		filename: databasePath
+	}
+})
+
+let get = field => item => item[field]
+
+let getId = get("id")
+
+yargs
+	.command({
+		command: "extract <handle> [name] [me]",
+		describe: "extract messages for a handle",
+		// aliases: ["$0"],
+		builder (yargs) {
+			return yargs
+				.positional(
+					"handle",
+					{
+						describe: "the handle whümfs messages to extract",
+						type: "string"
+					}
+				)
+				.positional(
+					"name",
+					{
+						describe: "the name to use for `handle`",
+						type: "string"
+					}
+				)
+				.positional(
+					"me",
+					{
+						describe: "the name to use for `me`",
+						type: "string",
+						default: "me"
+					}
+				)
+		},
+		handler: extract
+	})
+	.command({
+		command: "list-handles",
+		aliases: ["handles"],
+		describe: "list handles (like, contacts) from the database",
+		async handler () {
+			await knex
+				.select("*")
+				.from("handle")
+				.map(getId)
+				.then(handles => handles.forEach(handle => console.info(handle)))
+			process.exit()
+		}
+	})
+	.demandCommand(1, "you gotta chose a command")
+	.help()
+	.wrap(yargs.terminalWidth())
+	.argv
+
+async function extract (argv) {
+	let handle = argv.handle.trim()
+
+	let messages = await knex
+		.select([
+			"text",
+			"is_from_me",
+			"date",
+			"service",
+		])
+		.from("message")
+		.whereIn(
+			"handle_id",
+			knex
+				.select("ROWID")
+				.from("handle")
+				.where({
+					id: handle
+				})
+		)
+		.orderBy("date", "asc")
+		.then(messages => {
+			messages.forEach(message => {
+				message.date = convertAppleDateToIsoDate(message.date)
+				message.from = message.is_from_me ? argv.me : argv.name
+				message.to = message.is_from_me ? argv.name : argv.me
+				delete message.is_from_me
+			})
+
+			return messages
+
+		})
+
+	console.info(JSON.stringify(messages, 0, "\t"))
+	process.exit()
+}