systemprompt-mcp-reddit/build/utils/message-handlers.js

A specialized Model Context Protocol (MCP) server that enables you to search, read, and interact with Reddit content, leveraging an AI Agent to help with each operation.

import { XML_TAGS } from "../constants/message-handler.js";
/**
 * Updates a user message with existing page content
 * @param messages Array of messages to update
 * @param blocks The page blocks to include
 */
export function updateUserMessageWithContent(messages, blocks) {
    const userMessageIndex = messages.findIndex((msg) => msg.role === "user");
    if (userMessageIndex === -1)
        return;
    const userMessage = messages[userMessageIndex];
    if (userMessage.content.type !== "text")
        return;
    messages[userMessageIndex] = {
        role: "user",
        content: {
            type: "text",
            text: userMessage.content.text.replace(XML_TAGS.REQUEST_PARAMS_CLOSE, XML_TAGS.EXISTING_CONTENT_TEMPLATE(JSON.stringify(blocks, null, 2))),
        },
    };
}
/**
 * Injects variables into text
 * @param text The text to inject variables into
 * @param variables The variables to inject
 * @returns The text with variables injected
 */
export function injectVariablesIntoText(text, variables) {
    // First handle conditional blocks
    text = text.replace(/{{#([^}]+)}}(.*?){{\/\1}}/gs, (_, key, content) => {
        return key in variables && variables[key] ? content : "";
    });
    // Then handle direct variable replacements
    const directMatches = text.match(/{{([^#/][^}]*)}}/g);
    if (!directMatches)
        return text;
    const missingVariables = directMatches
        .map((match) => match.slice(2, -2))
        .filter((key) => !(key in variables));
    if (missingVariables.length > 0) {
        throw new Error("Missing required variables: " + missingVariables.join(", "));
    }
    return text.replace(/{{([^#/][^}]*)}}/g, (_, key) => String(variables[key] ?? ""));
}
/**
 * Injects variables into a message
 * @param message The message to inject variables into
 * @param variables The variables to inject
 * @returns The message with variables injected
 */
export function injectVariables(message, variables) {
    if (message.content.type !== "text")
        return message;
    return {
        ...message,
        content: {
            type: "text",
            text: injectVariablesIntoText(message.content.text, variables),
        },
    };
}
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