Added extra_info as resolve-call site addendum

experiments/res1.mjs

@@ -1,6 +1,6 @@
 import { Mapping_Resolver, Chained_Resolver } from '@efforting.tech/rule-processing/resolvers';
 
-
+import { inspect } from 'node:util';
 
 
 const vr = new Mapping_Resolver();
@@ -9,9 +9,55 @@ const tr = new Mapping_Resolver(new Map(), item => typeof item);
 const cr = new Chained_Resolver([vr, tr]);
 
 
-vr.rules.set('HELLO', () => 'WORLD');
-tr.rules.set('string', () => 'World');
+vr.rules.set('HELLO', {handler: () => 'WORLD'});
+tr.rules.set('string', {extra_stuff: 'Yo!', handler: (c) => `World with context: ${inspect(c)}`});
 
 console.log(cr.resolve('HELLO'));
 console.log(cr.resolve('hello'));
 console.log(cr.resolve(123));
+
+
+/* OUTPUT
+
+WORLD
+World with context: {
+  resolver: Chained_Resolver {
+    chain_links: [ [Mapping_Resolver], [Mapping_Resolver] ]
+  },
+  item: 'hello',
+  extra_stuff: 'Yo!',
+  handler: [Function: handler]
+}
+file:///srv/Projekt/efforting.tech/nodejs.esm-library/build/packages/rule-processing/resolv
+                        throw new Item_Unresolvable({ resolver: this, item });
+                              ^
+
+Item_Unresolvable [Error]: Cannot resolve item 123 of type "number" using resolver Chained_
+    at Chained_Resolver.resolve (file:///srv/Projekt/efforting.tech/nodejs.esm-library/buil
+    at file:///srv/Projekt/efforting.tech/nodejs.esm-library/experiments/res1.mjs:17:16
+    at ModuleJob.run (node:internal/modules/esm/module_job:430:25)
+    at async node:internal/modules/esm/loader:639:26
+    at async asyncRunEntryPointWithESMLoader (node:internal/modules/run_main:101:5) {
+  data: {
+    resolver: Chained_Resolver {
+      chain_links: [
+        Mapping_Resolver {
+          rules: Map(1) { 'HELLO' => [Object] },
+          key_function: null
+        },
+        Mapping_Resolver {
+          rules: Map(1) { 'string' => [Object] },
+          key_function: [Function (anonymous)]
+        }
+      ]
+    },
+    item: 123
+  }
+}
+
+Node.js v25.8.2
+
+
+
+
+*/

experiments/text-nodes-dispatch.mjs

@@ -0,0 +1,39 @@
+import * as CF from '@efforting.tech/data/field-configuration-factories';
+
+import { inspect } from 'node:util';
+import { Text_Tree_Node, Text_Tree_Settings } from  '@efforting.tech/text/basic-tree';
+import { RegExp_Resolver } from  '@efforting.tech/rule-processing/resolvers';
+import { parse_csv } from  '@efforting.tech/data/string-utilities';
+
+
+
+
+
+const ts = Text_Tree_Settings.load({
+	text: {
+		indention_mode: 'TABULATORS',
+	},
+	trim_lines: true,
+});
+
+const example_string =
+`
+animals:	dog, cat
+trees:		birch, pine
+
+`;
+
+
+const root = Text_Tree_Node.from_string(ts, example_string);
+
+
+const d = new RegExp_Resolver([
+	[/^animals:\s*(.*)$/, (c) => console.log("ANIMAL", c)],
+	[/^trees:\s*(.*)$/, ({node, predicate_result}) => console.log(`TREE of node at line ${node.line_no}:`, parse_csv(predicate_result[1]))],
+]);
+
+for (const child of root.children) {
+	if (child.has_line) {
+		console.log(child.line, d.resolve(child.line, { node: child }));
+	}
+}

experiments/text-nodes.mjs

@@ -1,51 +1,13 @@
 import * as CF from '@efforting.tech/data/field-configuration-factories';
 
-import { readFileSync } from 'node:fs';
 import { inspect } from 'node:util';
-
-import { Indention_Mode, Text_Settings } from '@efforting.tech/text/basic-tree';
-
-// TODO: Move into string helper module
-function string_has_contents(str) {
-	return /\S/.test(str);
-}
-
-function *indented_line_iterator(settings, text) {
-
-	let line_no = settings.first_line;
-	let index = 0;
-	const { indention_tabulator_width } = settings;
-
-	switch (settings.indention_mode) {
-		case Indention_Mode.symbols.TABULATORS: {
-			for (const line of text.matchAll(/^(\t*)(.*)$/gm)) {
-				const [raw, tabs, remaining] = line;
-				yield { raw, indent: tabs.length, line: remaining, line_no: line_no++, index: index++};
-			}
-			break;
-		}
-		case Indention_Mode.symbols.SPACES: {
-			for (const line of text.matchAll(/^([ ]*)(.*)$/gm)) {
-				const [raw, spaces, remaining] = line;
-
-				if ((spaces.length % indention_tabulator_width) !== 0) {
-					throw new Error('Unaligned indention');	//TODO - proper error
-				}
-				yield { raw, indent: Math.floor(spaces.length / indention_tabulator_width), line: remaining, line_no: line_no++, index: index++};
-			}
-			break;
-		}
-		default:
-			throw new Error('Unsupported indention mode');	//TODO - proper error
-
-	}
+import { Text_Tree_Node, Text_Tree_Settings } from  '@efforting.tech/text/basic-tree';
 
 
-}
-
-
-const ts = Text_Settings.load({
-	indention_mode: 'TABULATORS',
+const ts = Text_Tree_Settings.load({
+	text: {
+		indention_mode: 'TABULATORS',
+	},
 });
 
 const example_string =
@@ -68,61 +30,9 @@ branch3
 `;
 
 
-class Text_Node {
-	constructor(text_settings, line=undefined, indent=0, line_no=undefined, index=undefined, raw=undefined, parent=undefined) {
-		Object.assign(this, { text_settings, line, indent, line_no, index, raw, parent, children: [] });
-	}
-}
+const root = Text_Tree_Node.from_string(ts, example_string);
 
 
-const root = new Text_Node(ts);
-
-// NOTE: This first Text_Node is not added to the tree, it serves as an initial cursor only.
-let current = new Text_Node(root.text_settings, undefined, 0, undefined, undefined, undefined, root);
-
-
-for (const line_info of indented_line_iterator(ts, example_string)) {
-
-	// TODO: Implement other variants than inherit-from-previous
-	const indent = string_has_contents(line_info.line) ? line_info.indent : current.indent;
-
-	const delta_indent = indent - current.indent;
-
-	if (delta_indent == 0) {
-		const pending = new Text_Node(current.text_settings, undefined, current.indent, undefined, undefined, undefined, current.parent);	// Partial insertion - same level
-		if (current.parent) {
-			current.parent.children.push(pending);
-		}
-		current = pending;
-	} else if (delta_indent > 0) {
-		for (let i=0; i<delta_indent; i++) {
-			const pending = new Text_Node(current.text_settings, undefined, current.indent + 1, undefined, undefined, undefined, current);	// Partial insertion
-			current.children.push(pending);
-			current = pending;
-		}
-	} else {
-		for (let i=0; i>delta_indent; i--) {
-			current = current.parent;
-		}
-
-		const pending = new Text_Node(current.text_settings, undefined, current.indent, undefined, undefined, undefined, current.parent);	// Partial insertion - same level
-		if (current.parent) {
-			current.parent.children.push(pending);
-		}
-		current = pending;
-	}
-
-	// Fill in partial insertion
-	Object.assign(current, {
-		line: line_info.line,
-		line_no: line_info.line_no,
-		index: line_info.index,
-		raw: line_info.raw,
-	});
-
-
-}
-
 
 function debug_dump(node, level=0) {
 	console.log(`${"  ".repeat(level)}[${node.line_no ?? '-'}] ${inspect(node.line)}`);
@@ -132,6 +42,8 @@ function debug_dump(node, level=0) {
 }
 
 debug_dump(root);
+
+
 /*
 
 [-] undefined

package-manifest.yaml

@@ -1,6 +1,6 @@
 scope: '@efforting.tech'
 registry: 'https://npm.efforting.tech/'
-version: 0.2.8
+version: 0.2.9
 
 author:
   name: 'Mikael Lövqvist'

source/data/field-configuration-factories.mjs

@@ -15,6 +15,12 @@ export function typed_value(coercion_function, default_value, description) {
 	return new Field_Configuration(null, coercion_function, () => default_value, description);
 }
 
+export function boolean(default_value, description) {
+	//BUG: Text representations such as "false" is still truthy here - we should have a more capable coearcing function
+	return new Field_Configuration(null, Boolean, () => default_value, description);
+}
+
+
 export function typed_factory(coercion_function, factory_function, description) {
 	return new Field_Configuration(null, coercion_function, factory_function, description);
 }

source/data/string-utilities.mjs

@@ -0,0 +1,56 @@
+import * as CF from '@efforting.tech/data/field-configuration-factories';
+
+
+export const Indention_Mode = new CF.symbol_set({
+	AUTO: 'Automatic detection of indention mode',
+	SPACES: 'Indention is based on spaces',
+	TABULATORS: 'Indention is based on tabulators',
+}, 'Indention mode');
+
+
+// BUG: Current implementation of CF.symbol_set doesn't support default value
+export const Text_Settings = new CF.Schema({
+	indention_mode: Indention_Mode,
+	indention_tabulator_width: CF.cardinal_value(4, 'Width of a tabulator in spaces'),
+	first_line: CF.natural_value(1, 'First line number'),
+}, 'Text settings');
+
+
+export function string_has_contents(str) {
+	return /\S/.test(str);
+}
+
+export function parse_csv(str) {
+	// NOTE: This is for simple comma separated values, a future RFC-4180 compatible version would have to be in a different module in this library (or be a third party thing)
+	return str.split(',').map(element => element.trim());
+}
+
+
+export function *indented_line_iterator(settings, text) {
+	let line_no = settings.first_line;
+	let index = 0;
+	const { indention_tabulator_width } = settings;
+
+	switch (settings.indention_mode) {
+		case Indention_Mode.symbols.TABULATORS: {
+			for (const line of text.matchAll(/^(\t*)(.*)$/gm)) {
+				const [raw, tabs, remaining] = line;
+				yield { raw, indent: tabs.length, line: remaining, line_no: line_no++, index: index++};
+			}
+			break;
+		}
+		case Indention_Mode.symbols.SPACES: {
+			for (const line of text.matchAll(/^([ ]*)(.*)$/gm)) {
+				const [raw, spaces, remaining] = line;
+
+				if ((spaces.length % indention_tabulator_width) !== 0) {
+					throw new Error('Unaligned indention');	//TODO - proper error
+				}
+				yield { raw, indent: Math.floor(spaces.length / indention_tabulator_width), line: remaining, line_no: line_no++, index: index++};
+			}
+			break;
+		}
+		default:
+			throw new Error(`Unsupported indention mode: ${settings.indention_mode}`);	//TODO - proper error
+	}
+}

source/errors.mjs

@@ -50,7 +50,7 @@ export class Item_Unresolvable extends Error {
 	constructor(data) {
 		const { resolver, item } = data;
 		const type = item === null ? 'null' : typeof item;
-		super(`Cannot resolve item ${inspect(item)} of type "${type}" using resolver ${resolver}`);
+		super(`Cannot resolve item ${inspect(item)} of type "${type}" using resolver ${resolver.constructor.name}`);
 		this.data = data;
 	}
 }

source/rule-processing/resolvers.mjs

@@ -1,12 +1,13 @@
 import { Item_Unresolvable } from '@efforting.tech/errors';
 
 export class Abstract_Resolver {
-	resolve(item) {
-		const handler = this.resolve_handler(item);
-		if (!handler) {
+	resolve(item, extra_info={}) {
+		const result = this.resolve_handler(item);
+		if (!result?.handler) {
 			throw new Item_Unresolvable({ resolver: this, item });
 		}
-		return handler({ resolver: this, item });
+		// TO DOC: Spreading result into the resulting context means there are some reserved keys we need to be mindful of to avoid clobbering them
+		return result.handler({ resolver: this, item, ...extra_info, ...result });
 	}
 }
 
@@ -19,14 +20,44 @@ export class Chained_Resolver extends Abstract_Resolver {
 	resolve_handler(item) {
 		const { chain_links } = this;
 		for (const link of chain_links) {
-			const handler = link.resolve_handler(item);
-			if (handler) {
-				return handler;
+			const result = link.resolve_handler(item);
+			if (result?.handler) {
+				return result;
 			}
 		}
 	}
 }
 
+export class Predicate_Resolver extends Abstract_Resolver {
+	constructor(rules=[]) {
+		// NOTE: Rules should be iterable as [predicate, handler] pairs
+		super();
+		Object.assign(this, { rules });
+	}
+
+	resolve_handler(item) {
+		const { rules } = this;
+		for (const [predicate, handler] of rules) {
+			const predicate_result = predicate(item);
+			// NOTE: to return a falsy predicate_result as a positive hit you must wrap it in something
+			if (predicate_result) {
+				return { handler, predicate_result };
+			}
+		}
+	}
+}
+
+export class RegExp_Resolver extends Predicate_Resolver {
+	constructor(rules=[]) {
+		// NOTE: Rules should be iterable as [predicate, handler] pairs
+		super();
+		Object.assign(this, {
+			rules: rules.map(([pattern, handler]) => [(str) => str.match(pattern), handler])
+		});
+	}
+
+
+}
 
 export class Mapping_Resolver extends Abstract_Resolver {
 	constructor(rules=new Map(), key_function=null) {

source/text/basic-tree.mjs

@@ -1,16 +1,87 @@
+import { string_has_contents, indented_line_iterator } from  '@efforting.tech/data/string-utilities';
 import * as CF from '@efforting.tech/data/field-configuration-factories';
+import { Text_Settings } from  '@efforting.tech/data/string-utilities';
+
+export const Text_Tree_Settings = new CF.Schema({
+	//BUG - there is currently no way (I think) to put defaults into a sub schema - this should be fixed
+	text: Text_Settings,
+	trim_head: CF.boolean(false, 'Trim the empty lines from the head of a node'),
+	trim_tail: CF.boolean(false, 'Trim the empty lines from the tail of a node'),
+	trim_lines: CF.boolean(false, 'Trim lines'),
+}, 'Text tree settings');
+
+
+export class Text_Tree_Node {
+	constructor(text_tree_settings, line=undefined, indent=0, line_no=undefined, index=undefined, raw=undefined, parent=undefined) {
+		Object.assign(this, { text_tree_settings, line, indent, line_no, index, raw, parent, children: [] });
+	}
+
+	get has_line() {
+		return string_has_contents(this.line);
+	}
+
+
+	static from_string(text_tree_settings, str) {
+
+		const root = new this(text_tree_settings);
+		const { trim_head, trim_tail, trim_lines } = text_tree_settings;
+
+		// NOTE: This first Text_Node is not added to the tree, it serves as an initial cursor only.
+		let current = new this(root.text_tree_settings, undefined, 0, undefined, undefined, undefined, root);
+
+
+		for (const line_info of indented_line_iterator(text_tree_settings.text, str)) {
+
+			// TODO: Implement other variants than inherit-from-previous
+			const indent = string_has_contents(line_info.line) ? line_info.indent : current.indent;
+
+			const delta_indent = indent - current.indent;
+
+			if (delta_indent == 0) {
+				const pending = new this(current.text_tree_settings, undefined, current.indent, undefined, undefined, undefined, current.parent);	// Partial insertion - same level
+				if (current.parent) {
+					current.parent.children.push(pending);
+				}
+				current = pending;
+			} else if (delta_indent > 0) {
+				for (let i=0; i<delta_indent; i++) {
+					const pending = new this(current.text_tree_settings, undefined, current.indent + 1, undefined, undefined, undefined, current);	// Partial insertion
+					current.children.push(pending);
+					current = pending;
+				}
+			} else {
+				for (let i=0; i>delta_indent; i--) {
+					current = current.parent;
+				}
+
+				const pending = new this(current.text_tree_settings, undefined, current.indent, undefined, undefined, undefined, current.parent);	// Partial insertion - same level
+				if (current.parent) {
+					current.parent.children.push(pending);
+				}
+				current = pending;
+			}
+
+			// Fill in partial insertion
+			Object.assign(current, {
+				line: trim_lines ? line_info.line.trim() : line_info.line,
+				line_no: line_info.line_no,
+				index: line_info.index,
+				raw: line_info.raw,
+			});
+
+
+		}
+
+
+		if (trim_head || trim_tail) {	//TODO: Implement
+			throw new Error('Trimming is not implemented');	//TODO: Proper non implemented error
+		}
+
+		return root;
+
+	}
+}
 
 
-export const Indention_Mode = new CF.symbol_set({
-	AUTO: 'Automatic detection of indention mode',
-	SPACES: 'Indention is based on spaces',
-	TABULATORS: 'Indention is based on tabulators',
-}, 'Indention mode');
 
 
-// BUG: Current implementation of CF.symbol_set doesn't support default value
-export const Text_Settings = new CF.Schema({
-	indention_mode: Indention_Mode,
-	indention_tabulator_width: CF.cardinal_value(4, 'Width of a tabulator in spaces'),
-	first_line: CF.natural_value(1, 'First line number'),
-}, 'Text settings');

tools/show-annotations.sh

@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+
+#NOTE: This tool require you to install https://gitea.efforting.tech/mikael-lovqvist/shell-utils but you could remove the last line if you don't want that.
+#Example use: From the source-directory run ../tools/show-annotations.sh
+
+grep --color=always \
+	-rne '//[A-Z ]*:' \
+	--include "*.mjs" \
+	--exclude-dir node_modules \
+	| grep-mtime-sorter | ansi-trunc -l 250
+