Complete statical parsing of withExtraLanguages

src/bin/keycloakify/generateResources/generateMessageProperties.ts

@@ -1,6 +1,6 @@
 import { type ThemeType, FALLBACK_LANGUAGE_TAG } from "../../shared/constants";
 import { crawl } from "../../tools/crawl";
-import { join as pathJoin } from "path";
+import { join as pathJoin, dirname as pathDirname } from "path";
 import { symToStr } from "tsafe/symToStr";
 import * as recast from "recast";
 import * as babelParser from "@babel/parser";
@@ -11,6 +11,7 @@ import { getThisCodebaseRootDirPath } from "../../tools/getThisCodebaseRootDirPa
 import * as fs from "fs";
 import { assert } from "tsafe/assert";
 import type { BuildContext } from "../../shared/buildContext";
+import { getAbsoluteAndInOsFormatPath } from "../../tools/getAbsoluteAndInOsFormatPath";
 
 export type BuildContextLike = {
     themeNames: string[];
@@ -112,20 +113,7 @@ export function generateMessageProperties(params: {
         if (i18nTsFilePath === undefined) {
             return undefined;
         }
-        const root: recast.types.ASTNode = recast.parse(
+        const root = recastParseTs(i18nTsFilePath);
-            fs.readFileSync(i18nTsFilePath).toString("utf8"),
-            {
-                parser: {
-                    parse: (code: string) =>
-                        babelParser.parse(code, {
-                            sourceType: "module",
-                            plugins: ["typescript"]
-                        }),
-                    generator: babelGenerate,
-                    types: babelTypes
-                }
-            }
-        );
         return root;
     })();
 
@@ -136,7 +124,10 @@ export function generateMessageProperties(params: {
             return undefined;
         }
 
-        let out: Record<string, { label: string; path: string }> = {};
+        let extraLanguageEntryByLanguageTag: Record<
+            string,
+            { label: string; path: string }
+        > = {};
 
         recast.visit(i18nTsRoot, {
             visitCallExpression: function (path) {
@@ -225,7 +216,10 @@ export function generateMessageProperties(params: {
                                     });
 
                                     if (label && pathStr) {
-                                        out[lang] = { label, path: pathStr };
+                                        extraLanguageEntryByLanguageTag[lang] = {
+                                            label,
+                                            path: pathStr
+                                        };
                                     }
                                 }
                             }
@@ -239,9 +233,69 @@ export function generateMessageProperties(params: {
             }
         });
 
-        console.log(out);
+        const messages_defaultSet_by_languageTag_notInDefaultSet = Object.fromEntries(
+            Object.entries(extraLanguageEntryByLanguageTag).map(
+                ([languageTag, { path: relativePathWithoutExt }]) => [
+                    languageTag,
+                    (() => {
+                        const filePath = getAbsoluteAndInOsFormatPath({
+                            pathIsh: relativePathWithoutExt.endsWith(".ts")
+                                ? relativePathWithoutExt
+                                : `${relativePathWithoutExt}.ts`,
+                            cwd: pathDirname(i18nTsFilePath)
+                        });
 
-        return {};
+                        const root = recastParseTs(filePath);
+
+                        let declarationCode: string | undefined = "";
+
+                        recast.visit(root, {
+                            visitVariableDeclarator: function (path) {
+                                const node = path.node;
+
+                                // Check if the variable name is 'messages'
+                                if (
+                                    node.id.type === "Identifier" &&
+                                    node.id.name === "messages"
+                                ) {
+                                    // Ensure there is an initializer
+                                    if (node.init) {
+                                        // Generate code from the initializer, preserving comments
+                                        declarationCode = recast
+                                            .print(node.init)
+                                            .code.replace(/}.*$/, "}");
+                                    }
+                                    return false; // Stop traversing this path
+                                }
+
+                                this.traverse(path); // Continue traversing other paths
+                            }
+                        });
+
+                        assert(
+                            declarationCode !== undefined,
+                            `${filePath} does not contain a 'messages' variable declaration`
+                        );
+
+                        let messages: Record<string, string> = {};
+
+                        try {
+                            eval(`${symToStr({ messages })} = ${declarationCode};`);
+                        } catch {
+                            throw new Error(
+                                `The declaration of 'message' in ${filePath} cannot be statically evaluated: ${declarationCode}`
+                            );
+                        }
+
+                        return messages;
+                    })()
+                ]
+            )
+        );
+
+        console.log(messages_defaultSet_by_languageTag_notInDefaultSet);
+
+        return messages_defaultSet_by_languageTag_notInDefaultSet;
     })();
 
     const messages_defaultSet_by_languageTag = {
@@ -294,12 +348,8 @@ export function generateMessageProperties(params: {
         } catch {
             console.warn(
                 [
-                    "WARNING: Make sure the messageBundle your provided as argument of createUseI18n can be statically evaluated.",
+                    "WARNING: The argument of withCustomTranslations can't be statically evaluated!",
-                    "This is important because we need to put your i18n messages in messages_*.properties files",
+                    "This needs to be fixed refer to the documentation: https://docs.keycloakify.dev/i18n",
-                    "or they won't be available server side.",
-                    "\n",
-                    "The following code could not be evaluated:",
-                    "\n",
                     firstArgumentCode
                 ].join(" ")
             );
@@ -376,3 +426,17 @@ export function generateMessageProperties(params: {
         }
     };
 }
+
+function recastParseTs(filePath: string): recast.types.ASTNode {
+    return recast.parse(fs.readFileSync(filePath).toString("utf8"), {
+        parser: {
+            parse: (code: string) =>
+                babelParser.parse(code, {
+                    sourceType: "module",
+                    plugins: ["typescript"]
+                }),
+            generator: babelGenerate,
+            types: babelTypes
+        }
+    });
+}