oh-my-opencode/src/hooks/anthropic-context-window-limit-recovery/empty-content-recovery.ts

import {
  findEmptyMessages,
  findEmptyMessageByIndex,
  injectTextPart,
  replaceEmptyTextParts,
} from "../session-recovery/storage"
import type { AutoCompactState } from "./types"
import type { Client } from "./client"
import { PLACEHOLDER_TEXT } from "./message-builder"
import { incrementEmptyContentAttempt } from "./state"

export async function fixEmptyMessages(params: {
  sessionID: string
  autoCompactState: AutoCompactState
  client: Client
  messageIndex?: number
}): Promise<boolean> {
  incrementEmptyContentAttempt(params.autoCompactState, params.sessionID)

  let fixed = false
  const fixedMessageIds: string[] = []

  if (params.messageIndex !== undefined) {
    const targetMessageId = findEmptyMessageByIndex(params.sessionID, params.messageIndex)
    if (targetMessageId) {
      const replaced = replaceEmptyTextParts(targetMessageId, PLACEHOLDER_TEXT)
      if (replaced) {
        fixed = true
        fixedMessageIds.push(targetMessageId)
      } else {
        const injected = injectTextPart(params.sessionID, targetMessageId, PLACEHOLDER_TEXT)
        if (injected) {
          fixed = true
          fixedMessageIds.push(targetMessageId)
        }
      }
    }
  }

  if (!fixed) {
    const emptyMessageIds = findEmptyMessages(params.sessionID)
    if (emptyMessageIds.length === 0) {
      await params.client.tui
        .showToast({
          body: {
            title: "Empty Content Error",
            message: "No empty messages found in storage. Cannot auto-recover.",
            variant: "error",
            duration: 5000,
          },
        })
        .catch(() => {})
      return false
    }

    for (const messageID of emptyMessageIds) {
      const replaced = replaceEmptyTextParts(messageID, PLACEHOLDER_TEXT)
      if (replaced) {
        fixed = true
        fixedMessageIds.push(messageID)
      } else {
        const injected = injectTextPart(params.sessionID, messageID, PLACEHOLDER_TEXT)
        if (injected) {
          fixed = true
          fixedMessageIds.push(messageID)
        }
      }
    }
  }

  if (fixed) {
    await params.client.tui
      .showToast({
        body: {
          title: "Session Recovery",
          message: `Fixed ${fixedMessageIds.length} empty message(s). Retrying...`,
          variant: "warning",
          duration: 3000,
        },
      })
      .catch(() => {})
  }

  return fixed
}