action.yml: new subtle mode

action.yml

@@ -99,19 +99,23 @@ runs:
               repo: context.repo.repo,
               prnum: context.issue.number,
               max_tokens: '2048',
+              subtle_mode: 'false'
             }, config, properties, inputs)
 
             // convert to numbers some options
             options.debounce_time = parseFloat(options.debounce_time, 10)
             options.amplification = parseFloat(options.amplification, 10)
             options.prnum = parseFloat(options.prnum, 10)
             options.max_tokens = parseFloat(options.max_tokens, 10)
+            options.subtle_mode = options.subtle_mode === 'true'
 
             const { default: explainPatch } = options.anthropic_api_key
               ? await import('${{ github.action_path }}/src/anthropicExplainPatch.js')
               : await import('${{ github.action_path }}/src/openaiExplainPatch.js')
 
-            const { default: submitReview } = await import('${{ github.action_path }}/src/submitReview.js')
+            const { default: submitReview } = options.subtle_mode
+              ? await import('${{ github.action_path }}/src/subtleSubmitReview.js')
+              : await import('${{ github.action_path }}/src/submitReview.js')
 
             options.key = options.anthropic_api_key || options.openai_api_key
             options.models = options.anthropic_api_key ? options.anthropic_models : options.openai_models

src/subtleSubmitReview.js

@@ -0,0 +1,86 @@
+function isOlderThanXHours (date, hours) {
+  // Get the current date and time
+  const now = new Date()
+
+  // Calculate the time difference in milliseconds
+  const timeDiff = now - new Date(date)
+
+  // Convert the time difference to hours
+  const timeDiffInHours = timeDiff / (1000 * 60 * 60)
+
+  // Check if the time difference is greater than the specified number of hours
+  return timeDiffInHours > hours
+}
+
+function escapeRegex (string) {
+  return string.replace(/[/\-\\^$*+?.()|[\]{}]/g, '\\$&')
+}
+
+export default async function subtleSubmitReview ({
+  owner, repo, prnum, watermark, debounceTime,
+  explainPatch = async () => 'no explanation provided<!-- Generated by STUB -->',
+  githubToken = null,
+  github = null,
+  debug = false
+}) {
+  if (!github && githubToken) {
+    const { Octokit } = await import('@octokit/core')
+
+    github = new Octokit({ auth: githubToken })
+  }
+
+  if (debug) { console.log(`submitReview ${owner} ${repo} ${prnum}`) }
+
+  if (!github && !githubToken) {
+    throw new Error('You must provide a githubToken to use this function')
+  }
+
+  // check if the PR description already contains an AI review
+  const query = `query($owner:String!, $name:String!, $prnumber:Int!) {
+        repository(owner:$owner, name:$name) {
+          pullRequest(number:$prnumber) {
+            id
+            body
+          }
+        }
+    }`
+  const variables = {
+    owner,
+    name: repo,
+    prnumber: prnum
+  }
+  const msg = (await github.graphql(query, variables)).repository.pullRequest
+
+  // debounce if the PR description contains a watermark and the debounce time is not expired yet
+  if (msg.body.includes(watermark) && !isOlderThanXHours(msg.updatedAt, debounceTime)) {
+    throw new Error('debounce')
+  }
+
+  // TODO: modify the PR description in place, to include the AI summarization (2 cases)
+  // 1. if the PR AI description is empty, just add the AI summarization at the end
+  // 2. if the PR AI description is not empty, delete the previous AI summarization and add the new one
+  const begin = escapeRegex('<details><summary>AI Review</summary>\n\n') + escapeRegex(watermark)
+  const end = escapeRegex('<!-- Generated by ') + '\\w+' + escapeRegex(' --></details>')
+  const re = new RegExp(`${begin}.*${end}`, 's')
+
+  const newExplaination = '<details><summary>AI Review</summary>' + '\n\n' + watermark + '\n\n' + await explainPatch() + '</details>'
+
+  const newBody = msg.body.match(re)
+    ? msg.body.replace(re, newExplaination)
+    : msg.body + '\n\n' + newExplaination
+
+  const updatePRBodyQuery = `mutation UpdatePRDescription($prId: ID!, $body: String!) {
+    updatePullRequest(input:{pullRequestId:$prId, body:$body}) {
+      pullRequest {
+        id
+        body
+      }
+    }
+  }`
+  const updateVariables = {
+    prId: msg.id,
+    body: newBody
+  }
+
+  await github.graphql(updatePRBodyQuery, updateVariables)
+}