[{"_1":2,"_3":-5,"_4":-5},"loaderData",{"_5":6,"_7":8,"_9":10},"actionData","errors","root",{"_158":159,"_160":161},"routes/_app.x.$handle.$name",{"_99":98,"_32":45,"_107":89,"_27":55,"_13":14,"_108":-5,"_11":109,"_110":111,"_112":113,"_114":115,"_116":117,"_20":-5,"_118":-5,"_119":-5,"_120":25,"_121":122,"_123":124,"_125":-5,"_126":-5,"_127":128},"routes/_app.x.$handle.$name.branch.$branch.version.$version.diff",{"_11":12,"_13":14,"_15":16,"_17":-5,"_18":-5},"project",{"_43":44,"_32":45,"_38":46,"_47":-5,"_48":25,"_49":50,"_51":50,"_52":53,"_54":55,"_18":56,"_57":-5,"_58":25,"_59":-5,"_60":-5,"_61":62,"_63":64,"_65":66,"_67":68,"_69":70,"_71":-5,"_72":73,"_74":73,"_75":76,"_77":76,"_78":76,"_79":73,"_80":73,"_81":82,"_83":84,"_85":86,"_87":25},"version",43,"changes",[19],"aiChatInfo","userId",{"_20":21,"_22":23,"_24":25,"_26":25,"_27":28,"_29":28},"file",{"_30":31,"_32":28,"_33":34,"_35":37,"_38":39,"_40":14,"_41":42,"_24":25},"previous",{"_30":31,"_32":28,"_33":34,"_35":36},"deleted",false,"deletedHere","path","main.ts","latestPath","fileId","f3c6aeba-05ed-11f1-8ba5-42dde27851f2","name","fileType","http","content","import Cerebras from \"npm:@cerebras/cerebras_cloud_sdk\";\n\ninterface ValFile {\n name: string;\n path: string;\n type: \"file\" | \"directory\" | \"interval\" | \"http\" | \"email\" | \"script\";\n}\n\ninterface FileContent {\n name: string;\n path: string;\n code: string;\n chapterTitle?: string;\n explanation?: string;\n}\n\ninterface ValInfo {\n id: string;\n name: string;\n description?: string;\n}\n\nasync function fetchValByAlias(\n handle: string,\n valName: string,\n): Promise {\n const res = await fetch(\n `https://api.val.town/v2/alias/vals/${handle}/${valName}`,\n );\n if (!res.ok) {\n throw new Error(`Failed to fetch val: ${res.status} ${res.statusText}`);\n }\n return res.json();\n}\n\nasync function fetchValFiles(valId: string): Promise {\n const res = await fetch(`https://api.val.town/v2/vals/${valId}/files?path`);\n if (!res.ok) {\n throw new Error(\n `Failed to fetch files: ${res.status} ${res.statusText} ${await res\n .text()}`,\n );\n }\n const data = await res.json();\n return data.data || [];\n}\n\nasync function fetchFileContent(valId: string, path: string): Promise {\n const res = await fetch(\n `https://api.val.town/v2/vals/${valId}/files/content?path=${\n encodeURIComponent(path)\n }`,\n );\n if (!res.ok) {\n return `// Failed to load content: ${res.status}`;\n }\n const data = await res.text();\n return data || \"\";\n}\n\nasync function generateChapterTitles(files: FileContent[]): Promise {\n const apiKey = Deno.env.get(\"CEREBRAS_API_KEY\");\n if (!apiKey) {\n return files.map((f) => f.path);\n }\n\n const client = new Cerebras({\n apiKey: apiKey,\n });\n\n const codeSnippets = files\n .map(\n (f, i) =>\n `File ${i + 1} (${f.path}):\\n\\`\\`\\`\\n${f.code.slice(0, 1500)}\\n\\`\\`\\``,\n )\n .join(\"\\n\\n\");\n\n const prompt =\n `You are creating chapter titles for a programming book. Each chapter corresponds to a code file. Generate creative, evocative chapter titles that capture the essence of what each file does - like chapters in a novel about code.\n\nHere are the code files:\n\n${codeSnippets}\n\nGenerate one title per file, in the same order. Keep titles concise (2-6 words). Be creative and literary, not just technical descriptions. Examples of good titles: \"The Guardian at the Gate\", \"Where Data Flows\", \"A Promise Kept\", \"The Shape of Things\".`;\n\n const schema = {\n type: \"object\",\n properties: {\n titles: {\n type: \"array\",\n items: { type: \"string\" },\n },\n },\n required: [\"titles\"],\n additionalProperties: false,\n };\n\n try {\n const completion = await client.chat.completions.create({\n model: \"zai-glm-4.7\",\n messages: [{ role: \"user\", content: prompt }],\n temperature: 0.7,\n response_format: {\n type: \"json_schema\",\n json_schema: {\n name: \"chapter_titles\",\n strict: true,\n schema: schema,\n },\n },\n });\n\n const comp = completion as any;\n const choice = comp.choices[0];\n const message = choice?.message;\n const content = message?.content || \"\";\n\n if (content) {\n const result = JSON.parse(content);\n if (\n result.titles && Array.isArray(result.titles) &&\n result.titles.length === files.length\n ) {\n return result.titles;\n }\n }\n\n console.log(\"No valid content, falling back to file paths\");\n return files.map((f) => f.path);\n } catch (e) {\n console.error(\"Error generating chapter titles:\", e);\n return files.map((f) => f.path);\n }\n}\n\nasync function generateExplanation(\n code: string,\n filename: string,\n): Promise {\n const apiKey = Deno.env.get(\"CEREBRAS_API_KEY\");\n if (!apiKey) {\n return \"\";\n }\n\n const client = new Cerebras({\n apiKey: apiKey,\n });\n\n const prompt =\n `You are writing explanatory prose for a programming book. Your task is to explain what this code does in multiple paragraphs (at least 3-4 paragraphs).\n\nThe explanation should be detailed and insightful, covering:\n- The overall purpose of the code\n- Key functions and their roles\n- Important patterns or algorithms used\n- The flow of execution\n\nCRITICAL REQUIREMENTS for linking code:\n1. When you reference specific parts of the code, use markdown links with this exact format: [descriptive text](/{filename}:{lineStart}-{lineEnd})\n2. The line numbers must be accurate - count lines from line 1\n3. Start with a slash \"/\" followed by the filename\n4. The format must be: [text to display](/filename.ts:10-25)\n5. Always use line ranges, not single lines\n6. Each paragraph should include at least one code reference link\n\nExample of correct format:\n\"The [main function](/index.ts:15-30) handles request processing by first validating the input parameters and then calling the appropriate service. The validation logic [checks for required fields](/index.ts:20-23) before proceeding.\"\n\nFile name: ${filename}\n\nCode to explain:\n\\`\\`\\`\n${code}\n\\`\\`\\`\n\nWrite your explanation as multiple paragraphs of prose, with code reference links in the format [text](/filename.ts:lineStart-lineEnd).`;\n\n try {\n const completion = await client.chat.completions.create({\n model: \"zai-glm-4.7\",\n messages: [{ role: \"user\", content: prompt }],\n temperature: 0.7,\n });\n\n const comp = completion as any;\n const choice = comp.choices[0];\n const message = choice?.message;\n const content = message?.content || \"\";\n return content;\n } catch (e) {\n console.error(\"Error generating explanation:\", e);\n return \"\";\n }\n}\n\nfunction filterCodeFiles(files: ValFile[]): ValFile[] {\n return files.filter(\n (f) => f.type !== \"directory\" && /\\.(ts|tsx|js|jsx)$/.test(f.name),\n );\n}\n\nfunction escapeHtml(str: string): string {\n return str\n .replace(/&/g, \"&\")\n .replace(//g, \">\")\n .replace(/\"/g, \""\");\n}\n\nfunction highlightCode(code: string): string {\n let html = escapeHtml(code);\n\n // Highlight comments\n html = html.replace(/(\\/\\/.*)/g, '$1');\n\n // Highlight strings\n html = html.replace(\n /("[^&]*"|`[^`]*`|'[^']*')/g,\n '$1',\n );\n\n // Highlight keywords\n const keywords =\n /\\b(const|let|var|function|class|return|if|else|for|of|in|async|await|new|export|import|default|extends|constructor|try|catch|finally|throw|public|private|interface|type|from)\\b/g;\n html = html.replace(keywords, '$1');\n\n // Highlight types\n html = html.replace(\n /:\\s*(string|number|boolean|void|any|Promise|Error|Response|Request)\\b/g,\n ': $1',\n );\n\n // Highlight numbers\n html = html.replace(/\\b(\\d+)\\b/g, '$1');\n\n // Highlight function names\n html = html.replace(\n /\\b([a-zA-Z_][a-zA-Z0-9_]*)\\s*\\(/g,\n '$1(',\n );\n\n return html;\n}\n\nfunction renderPage(\n valIdentifier: string,\n chapters: FileContent[],\n selectedIndex: number = 0,\n error?: string,\n): string {\n const selected = chapters[selectedIndex];\n\n const chapterItems = chapters\n .map(\n (ch, i) => `\n \n ${String(i + 1).padStart(2, \"0\")}\n ${\n escapeHtml(ch.chapterTitle || ch.path)\n }\n \n `,\n )\n .join(\"\");\n\n const introText = valIdentifier\n ? `Exploring the source code of ${\n escapeHtml(valIdentifier)\n }. Select a file from the chapters to view its code and explanation.`\n : `Enter a val identifier (e.g., handle/valName) to explore its source code.`;\n\n const codeLines = selected ? selected.code.split(\"\\n\") : [];\n const codeContent = selected\n ? codeLines.map((line, i) =>\n `${\n highlightCode(line)\n }`\n ).join(\"\\n\")\n : error\n ? `

${escapeHtml(error)}

`\n : `

Select a file to view its code

`;\n\n const explanationContent = selected\n ? selected.explanation\n ? `

${selected.explanation}

`\n : `

Generating explanation...

`\n : error\n ? `

${escapeHtml(error)}

`\n : `

Select a file to view its explanation

`;\n\n return `\n\n\n \n \n ${valIdentifier ? `${valIdentifier} - The Book` : \"The Book\"}\n \n\n\n

The Book

${introText}

\n \n

\n\n

Chapters

\n ${\n chapters.length > 0\n ? chapterItems\n : '

No files to display

'\n }\n

\n\n

Explanation

\n ${explanationContent}\n

\n\n

${codeContent}

\n \n\n`;\n}\n\nexport default async function (req: Request): Promise {\n const url = new URL(req.url);\n const valParam = url.searchParams.get(\"val\") || \"\";\n const chapterParam = url.searchParams.get(\"chapter\");\n const selectedIndex = chapterParam ? parseInt(chapterParam, 10) : 0;\n\n let chapters: FileContent[] = [];\n let error: string | undefined;\n\n if (valParam) {\n const parts = valParam.split(\"/\");\n if (parts.length === 2) {\n const [handle, valName] = parts;\n try {\n // First, get the val ID from the alias\n const valInfo = await fetchValByAlias(handle, valName);\n\n // Then fetch the files using the val ID\n const files = await fetchValFiles(valInfo.id);\n const codeFiles = filterCodeFiles(files);\n\n // Fetch content for all code files\n chapters = await Promise.all(\n codeFiles.map(async (f) => ({\n name: f.name,\n path: f.path,\n code: await fetchFileContent(valInfo.id, f.path),\n })),\n );\n\n const titles = await generateChapterTitles(chapters);\n chapters = chapters.map((ch, i) => ({\n ...ch,\n chapterTitle: titles[i],\n }));\n\n const explanations = await Promise.all(\n chapters.map((ch) => generateExplanation(ch.code, ch.name)),\n );\n chapters = chapters.map((ch, i) => ({\n ...ch,\n explanation: explanations[i],\n }));\n } catch (e) {\n error = e instanceof Error ? e.message : \"Failed to fetch val\";\n }\n } else {\n error = \"Invalid val identifier. Use format: handle/valName\";\n }\n }\n\n const validIndex = Math.max(0, Math.min(selectedIndex, chapters.length - 1));\n\n return new Response(renderPage(valParam, chapters, validIndex, error), {\n headers: { \"Content-Type\": \"text/html\" },\n });\n}","import Cerebras from \"npm:@cerebras/cerebras_cloud_sdk\";\n\ninterface ValFile {\n name: string;\n path: string;\n type: \"file\" | \"directory\" | \"interval\" | \"http\" | \"email\" | \"script\";\n}\n\ninterface FileContent {\n name: string;\n path: string;\n code: string;\n chapterTitle?: string;\n explanation?: string;\n}\n\ninterface ValInfo {\n id: string;\n name: string;\n description?: string;\n}\n\nasync function fetchValByAlias(\n handle: string,\n valName: string,\n): Promise {\n const res = await fetch(\n `https://api.val.town/v2/alias/vals/${handle}/${valName}`,\n );\n if (!res.ok) {\n throw new Error(`Failed to fetch val: ${res.status} ${res.statusText}`);\n }\n return res.json();\n}\n\nasync function fetchValFiles(valId: string): Promise {\n const res = await fetch(`https://api.val.town/v2/vals/${valId}/files?path`);\n if (!res.ok) {\n throw new Error(\n `Failed to fetch files: ${res.status} ${res.statusText} ${await res\n .text()}`,\n );\n }\n const data = await res.json();\n return data.data || [];\n}\n\nasync function fetchFileContent(valId: string, path: string): Promise {\n const res = await fetch(\n `https://api.val.town/v2/vals/${valId}/files/content?path=${\n encodeURIComponent(path)\n }`,\n );\n if (!res.ok) {\n return `// Failed to load content: ${res.status}`;\n }\n const data = await res.text();\n return data || \"\";\n}\n\nasync function generateChapterTitles(files: FileContent[]): Promise {\n const apiKey = Deno.env.get(\"CEREBRAS_API_KEY\");\n if (!apiKey) {\n return files.map((f) => f.path);\n }\n\n const client = new Cerebras({\n apiKey: apiKey,\n });\n\n const codeSnippets = files\n .map(\n (f, i) =>\n `File ${i + 1} (${f.path}):\\n\\`\\`\\`\\n${f.code.slice(0, 1500)}\\n\\`\\`\\``,\n )\n .join(\"\\n\\n\");\n\n const prompt =\n `You are creating chapter titles for a programming book. Each chapter corresponds to a code file. Generate creative, evocative chapter titles that capture the essence of what each file does - like chapters in a novel about code.\n\nHere are the code files:\n\n${codeSnippets}\n\nGenerate one title per file, in the same order. Keep titles concise (2-6 words). These should be technical but accessible, like \"Setting up the database\" or \"Authentication utilities\".`;\n\n const schema = {\n type: \"object\",\n properties: {\n titles: {\n type: \"array\",\n items: { type: \"string\" },\n },\n },\n required: [\"titles\"],\n additionalProperties: false,\n };\n\n try {\n const completion = await client.chat.completions.create({\n model: \"zai-glm-4.7\",\n messages: [{ role: \"user\", content: prompt }],\n temperature: 0.7,\n response_format: {\n type: \"json_schema\",\n json_schema: {\n name: \"chapter_titles\",\n strict: true,\n schema: schema,\n },\n },\n });\n\n const comp = completion as any;\n const choice = comp.choices[0];\n const message = choice?.message;\n const content = message?.content || \"\";\n\n if (content) {\n const result = JSON.parse(content);\n if (\n result.titles && Array.isArray(result.titles) &&\n result.titles.length === files.length\n ) {\n return result.titles;\n }\n }\n\n console.log(\"No valid content, falling back to file paths\");\n return files.map((f) => f.path);\n } catch (e) {\n console.error(\"Error generating chapter titles:\", e);\n return files.map((f) => f.path);\n }\n}\n\nasync function generateExplanation(\n code: string,\n filename: string,\n): Promise {\n const apiKey = Deno.env.get(\"CEREBRAS_API_KEY\");\n if (!apiKey) {\n return \"\";\n }\n\n const client = new Cerebras({\n apiKey: apiKey,\n });\n\n const prompt =\n `You are writing explanatory prose for a programming book. Your task is to explain what this code does in multiple paragraphs (at least 3-4 paragraphs).\n\nThe explanation should be detailed and insightful, covering:\n- The overall purpose of the code\n- Key functions and their roles\n- Important patterns or algorithms used\n- The flow of execution\n\nCRITICAL REQUIREMENTS for linking code:\n1. When you reference specific parts of the code, use markdown links with this exact format: [descriptive text](/{filename}:{lineStart}-{lineEnd})\n2. The line numbers must be accurate - count lines from line 1\n3. Start with a slash \"/\" followed by the filename\n4. The format must be: [text to display](/filename.ts:10-25)\n5. Always use line ranges, not single lines\n6. Each paragraph should include at least one code reference link\n\nExample of correct format:\n\"The [main function](/index.ts:15-30) handles request processing by first validating the input parameters and then calling the appropriate service. The validation logic [checks for required fields](/index.ts:20-23) before proceeding.\"\n\nFile name: ${filename}\n\nCode to explain:\n\\`\\`\\`\n${code}\n\\`\\`\\`\n\nWrite your explanation as multiple paragraphs of prose, with code reference links in the format [text](/filename.ts:lineStart-lineEnd).`;\n\n try {\n const completion = await client.chat.completions.create({\n model: \"zai-glm-4.7\",\n messages: [{ role: \"user\", content: prompt }],\n temperature: 0.7,\n });\n\n const comp = completion as any;\n const choice = comp.choices[0];\n const message = choice?.message;\n const content = message?.content || \"\";\n return content;\n } catch (e) {\n console.error(\"Error generating explanation:\", e);\n return \"\";\n }\n}\n\nfunction filterCodeFiles(files: ValFile[]): ValFile[] {\n return files.filter(\n (f) => f.type !== \"directory\" && /\\.(ts|tsx|js|jsx)$/.test(f.name),\n );\n}\n\nfunction escapeHtml(str: string): string {\n return str\n .replace(/&/g, \"&\")\n .replace(//g, \">\")\n .replace(/\"/g, \""\");\n}\n\nfunction highlightCode(code: string): string {\n let html = escapeHtml(code);\n\n // Highlight comments\n html = html.replace(/(\\/\\/.*)/g, '$1');\n\n // Highlight strings\n html = html.replace(\n /("[^&]*"|`[^`]*`|'[^']*')/g,\n '$1',\n );\n\n // Highlight keywords\n const keywords =\n /\\b(const|let|var|function|class|return|if|else|for|of|in|async|await|new|export|import|default|extends|constructor|try|catch|finally|throw|public|private|interface|type|from)\\b/g;\n html = html.replace(keywords, '$1');\n\n // Highlight types\n html = html.replace(\n /:\\s*(string|number|boolean|void|any|Promise|Error|Response|Request)\\b/g,\n ': $1',\n );\n\n // Highlight numbers\n html = html.replace(/\\b(\\d+)\\b/g, '$1');\n\n // Highlight function names\n html = html.replace(\n /\\b([a-zA-Z_][a-zA-Z0-9_]*)\\s*\\(/g,\n '$1(',\n );\n\n return html;\n}\n\nfunction renderPage(\n valIdentifier: string,\n chapters: FileContent[],\n selectedIndex: number = 0,\n error?: string,\n): string {\n const selected = chapters[selectedIndex];\n\n const chapterItems = chapters\n .map(\n (ch, i) => `\n \n ${String(i + 1).padStart(2, \"0\")}\n ${\n escapeHtml(ch.chapterTitle || ch.path)\n }\n \n `,\n )\n .join(\"\");\n\n const introText = valIdentifier\n ? `Exploring the source code of ${\n escapeHtml(valIdentifier)\n }. Select a file from the chapters to view its code and explanation.`\n : `Enter a val identifier (e.g., handle/valName) to explore its source code.`;\n\n const codeLines = selected ? selected.code.split(\"\\n\") : [];\n const codeContent = selected\n ? codeLines.map((line, i) =>\n `${\n highlightCode(line)\n }`\n ).join(\"\\n\")\n : error\n ? `

${escapeHtml(error)}

`\n : `

Select a file to view its code

`;\n\n const explanationContent = selected\n ? selected.explanation\n ? `

${selected.explanation}

`\n : `

Generating explanation...

`\n : error\n ? `

${escapeHtml(error)}

`\n : `

Select a file to view its explanation

`;\n\n return `\n\n\n \n \n ${valIdentifier ? `${valIdentifier} - The Book` : \"The Book\"}\n \n\n\n

The Book

${introText}

\n \n

\n\n

Chapters

\n ${\n chapters.length > 0\n ? chapterItems\n : '

No files to display

'\n }\n

\n\n

Explanation

\n ${explanationContent}\n

\n\n

${codeContent}

Diff · v43