# All files / src/tools getVotingRecords.ts

85% Statements 17/20
66.66% Branches 4/6
100% Functions 3/3
85% Lines 17/20

Press n or j to go to the next uncovered block, b, p or k for the previous block.

    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14
    15
    16
    17
    18
    19
    20
    21
    22
    23
    24
    25
    26
    27
    28
    29
    30
    31
    32
    33
    34
    35
    36
    37
    38
    39
    40
    41
    42
    43
    44
    45
    46
    47
    48
    49
    50
    51
    52
    53
    54
    55
    56
    57
    58
    59
    60
    61
    62
    63
    64
    65
    66
    67
    68
    69
    70
    71
    72
    73
    74
    75
    76
    77
    78
    79
    80
    81
    82
    83
    84
    85
    86
    87
    88
    89
    90
    91
    92
    93
    94
    95
    96
    97
    98
    99
    100
    101
    102
    103
    104
    105
    106
    107
    108
    109
    110
    111
    112
    113
    114
    115
    116
    117
    118
    119
    120
    121
    122
    123
    124
    125
    126
    127
    128
    129
    130
    131
    132
    133
    134
    135
    136
    137
    138
    139
    140
    141
    142
    143
    144
    145
    146
    147
    148
    149
    150
    151
    152
    153
    154
    155
    156
    157
    158
    159
    160
    161
    162
    163
    164
    165
    166
    167
    168
    169
    170
    171
    172
    173
    174
    175
    176
    177
    178
    179
    180

    5x

    5x
    5x

    22x
    22x

    5x
    5x
    5x

    17x
    17x

    17x

    13x
    13x

    13x

    4x

    4x

    4x

     /**
     * MCP Tool: get_voting_records
     *
     * Retrieve voting records from European Parliament plenary sessions
     *
     * **Intelligence Perspective:** Core intelligence product for voting pattern analysis,
     * political group cohesion measurement, cross-party alliance detection, and MEP
     * loyalty/independence scoring through structured analytic techniques.
     *
     * **Business Perspective:** High-value data product for political risk assessment firms,
     * policy analysis consultancies, and corporate government affairs departments.
     *
     * **Marketing Perspective:** Most compelling data for data journalism partnerships,
     * academic research collaborations, and transparency advocacy organizations.
     *
     * ISMS Policy: SC-002 (Input Validation), AC-003 (Least Privilege)
     */

    import { GetVotingRecordsSchema, VotingRecordSchema, PaginatedResponseSchema } from '../schemas/europeanParliament.js';
    import { epClient } from '../clients/europeanParliamentClient.js';
    import { buildToolResponse } from './shared/responseBuilder.js';
    import { buildApiParams } from './shared/paramBuilder.js';
    import { ToolError } from './shared/errors.js';
    import { z } from 'zod';
    import type { ToolResult } from './shared/types.js';

    /**
     * Format a list of Zod issues into a single human-readable string.
     *
     * Root-level issues (e.g. `unrecognized_keys` produced by `.strict()`) have
     * an empty `path` array; rendering them as `path.join('.')` would yield
     * `: message` with a misleading leading colon. We substitute `(root)` for
     * such issues so the error reads `(root): Unrecognized key(s) ...`.
     */
    function formatZodIssues(error: z.ZodError): string {
      return error.issues
        .map(issue => {
          const pathStr = issue.path.length > 0 ? issue.path.join('.') : '(root)';
          return `${pathStr}: ${issue.message}`;
        })
        .join('; ');
    }

    /**
     * Handles the get_voting_records MCP tool request.
     *
     * Retrieves voting records from European Parliament plenary sessions, supporting
     * filtering by session, topic, and date range. Returns aggregate vote tallies
     * (for/against/abstain) and final results. The EP API only provides aggregate
     * vote counts, not individual MEP positions.
     *
     * @param args - Raw tool arguments, validated against {@link GetVotingRecordsSchema}
     * @returns MCP tool result containing a paginated list of voting records with vote counts and results
     * @throws - If `args` fails schema validation (e.g., missing required fields or invalid format)
     * - If the European Parliament API is unreachable or returns an error response
     *
     * @example
     * ```typescript
     * const result = await handleGetVotingRecords({
     *   sessionId: 'PLENARY-2024-01',
     *   topic: 'Climate Change',
     *   limit: 20
     * });
     * // Returns voting records for the January 2024 plenary session on climate topics
     * ```
     *
     * @security - Input is validated with Zod before any API call.
     * - Personal data in responses is minimised per GDPR Article 5(1)(c).
     * - All requests are rate-limited and audit-logged per ISMS Policy AU-002.
     * @since 0.8.0
     * @see {@link getVotingRecordsToolMetadata} for MCP schema registration
     * @see [handleGetMeetingDecisions](../../getMeetingDecisions/functions/handleGetMeetingDecisions.md) for retrieving decisions linked to a specific sitting
     */
    export async function handleGetVotingRecords(
      args: unknown
    ): Promise<ToolResult> {
      let params: ReturnType<typeof GetVotingRecordsSchema.parse>;
      try {
        params = GetVotingRecordsSchema.parse(args);
      } catch (error: unknown) {
        Eif (error instanceof z.ZodError) {
          const fieldErrors = formatZodIssues(error);
          throw new ToolError({
            toolName: 'get_voting_records',
            operation: 'validateInput',
            message: `Invalid parameters: ${fieldErrors}`,
            isRetryable: false,
            cause: error,
          });
        }
        throw error;
      }

      try {
        const apiParams = {
          limit: params.limit,
          offset: params.offset,
          ...buildApiParams(params, [
            { from: 'sessionId', to: 'sessionId' },
            { from: 'topic', to: 'topic' },
            { from: 'dateFrom', to: 'dateFrom' },
            { from: 'dateTo', to: 'dateTo' },
          ]),
        };

        const result = await epClient.getVotingRecords(apiParams);

        const outputSchema = PaginatedResponseSchema(VotingRecordSchema);
        const validated = outputSchema.parse(result);

        return buildToolResponse(validated);
      } catch (error: unknown) {
        Iif (error instanceof z.ZodError) {
          const fieldErrors = formatZodIssues(error);
          throw new ToolError({
            toolName: 'get_voting_records',
            operation: 'validateOutput',
            message: `Unexpected EP API response format: ${fieldErrors}`,
            isRetryable: false,
            cause: error,
          });
        }
        throw new ToolError({
          toolName: 'get_voting_records',
          operation: 'fetchData',
          message: 'Failed to retrieve voting records',
          isRetryable: true,
          cause: error,
        });
      }
    }

    /**
     * Tool metadata for MCP registration
     */
    export const getVotingRecordsToolMetadata = {
      name: 'get_voting_records',
      description: 'Retrieve voting records from European Parliament plenary sessions. Filter by session, topic, or date range. Returns aggregate vote counts (for/against/abstain) and final result. The EP API only provides aggregate vote tallies, not individual MEP positions. NOTE: The EP publishes roll-call voting data with a delay of several weeks, so queries for the most recent 1-2 months may return empty results — this is expected EP API behavior, not an error.',
      inputSchema: {
        type: 'object' as const,
        properties: {
          sessionId: {
            type: 'string',
            description: 'Plenary session identifier',
            minLength: 1,
            maxLength: 100
          },
          topic: {
            type: 'string',
            description: 'Vote topic or keyword to search',
            minLength: 1,
            maxLength: 200
          },
          dateFrom: {
            type: 'string',
            description: 'Start date filter (YYYY-MM-DD format)',
            pattern: '^\\d{4}-\\d{2}-\\d{2}$'
          },
          dateTo: {
            type: 'string',
            description: 'End date filter (YYYY-MM-DD format)',
            pattern: '^\\d{4}-\\d{2}-\\d{2}$'
          },
          limit: {
            type: 'number',
            description: 'Maximum number of results to return (1-100)',
            minimum: 1,
            maximum: 100,
            default: 50
          },
          offset: {
            type: 'number',
            description: 'Pagination offset',
            minimum: 0,
            default: 0
          }
        }
      }
    };