Started textnodes, renamed tool with wrong name, started field configuration system

experiments/config.mjs

@@ -0,0 +1,16 @@
+import { Field_Configuration  } from '@efforting.tech/data/field-configuration';
+
+
+function mandatory_anything(value) {
+	return value !== undefined;
+}
+
+
+const fc = new Field_Configuration('Some_Field', mandatory_anything, 'Anything defined');
+
+
+console.log(fc.check_validation(undefined));
+console.log(fc.check_validation(true));
+
+//fc.validate(undefined);
+fc.validate(undefined, 'New thingamabob object');

experiments/package.json

@@ -3,6 +3,7 @@
 	"type": "module",
 	"dependencies": {
 		"@efforting.tech/errors": "link:../build/packages/errors",
-		"@efforting.tech/rule-processing": "link:../build/packages/rule-processing"
+		"@efforting.tech/rule-processing": "link:../build/packages/rule-processing",
+		"@efforting.tech/data": "link:../build/packages/data"
 	}
 }

package-manifest.yaml

@@ -21,6 +21,12 @@ packages:
     internal-dependencies:
       - errors
 
+  data:
+    path: source/data
+    #documentation: documentation/data
+    description: Data management
+    internal-dependencies:
+      - errors
 
 wip-packages:
   object-graph-storage:

source/data/field-configuration.mjs

@@ -0,0 +1,24 @@
+import { Invalid_Data } from '@efforting.tech/errors';
+
+export class Field_Configuration {
+	constructor(name, validator=null, expected=undefined) {
+		Object.assign(this, { name, validator, expected });
+	}
+
+	check_validation(value) {
+		const { validator } = this;
+
+		return !validator || validator(value);
+	}
+
+	validate(value, target=undefined) {
+		const { validator, name, expected } = this;
+		if (!this.check_validation(value)) {
+			throw new Invalid_Data({
+				name, validator, value,
+				target, expected,
+			});
+		}
+	}
+
+}

source/errors.mjs

@@ -1,5 +1,18 @@
 import { inspect } from 'node:util';
 
+// § GROUP: Configuration field errors
+
+export class Invalid_Data extends Error {
+	constructor(data) {
+		const { value, target, expected, validator, name } = data;
+		const type = value === null ? 'null' : typeof value;
+		const target_info = target ? inspect(target) : 'unknown target';
+		const expected_desc = expected ?? `data that would pass validation using ${validator}`;
+		super(`Data validation failed for field "${name}" of ${target_info}. Encountered data of type "${type}" while expecting "${expected_desc}".`);
+		this.data = data;
+	}
+}
+
 // § GROUP: Resolving errors
 
 export class Item_Unresolvable extends Error {

tools/stage-for-pnpm.mjs

@@ -89,7 +89,7 @@ for (const [package_name, package_data] of Object.entries(manifest.packages)) {
 	const exports_map = {};
 	for (const file of linked_sources) {
 		const name = path.basename(file, '.mjs');
-		const key = name === pkg.name ? '.' : `./${name}`;
+		const key = name === path.basename(pkg.name) ? '.' : `./${name}`;
 		exports_map[key] =  `./${file}`;
 	}