import { Graph, q, moveBlock as moveRoamBlock } from '@roam-research/roam-api-sdk';
import { McpError, ErrorCode } from '@modelcontextprotocol/sdk/types.js';
export class BlockOperations {
constructor(private graph: Graph) {}
async moveBlock(
block_uid: string,
parent_uid: string,
order: number | 'first' | 'last' = 'last'
): Promise<{ success: boolean; block_uid: string; new_parent_uid: string; order: number | string }> {
if (!block_uid) {
throw new McpError(ErrorCode.InvalidRequest, 'block_uid is required');
}
if (!parent_uid) {
throw new McpError(ErrorCode.InvalidRequest, 'parent_uid is required');
}
// Verify the block exists
const blockQuery = `[:find ?uid .
:where [?b :block/uid "${block_uid}"]
[?b :block/uid ?uid]]`;
const blockExists = await q(this.graph, blockQuery, []);
if (!blockExists) {
throw new McpError(
ErrorCode.InvalidRequest,
`Block with UID "${block_uid}" not found`
);
}
try {
await moveRoamBlock(this.graph, {
action: 'move-block',
location: {
'parent-uid': parent_uid,
order: order
},
block: {
uid: block_uid
}
});
return {
success: true,
block_uid,
new_parent_uid: parent_uid,
order
};
} catch (error: any) {
throw new McpError(
ErrorCode.InternalError,
`Failed to move block: ${error.message}`
);
}
}
}
