Zig

Get a Mail-Merge Replace Pattern

Demonstrates the Chilkat Email.GetReplacePattern method, which returns a replacement pattern — the search string — previously defined for mail-merge operations with SetReplacePattern. The index is zero-based. This example defines two patterns and enumerates them.

Background: In Chilkat's mail-merge, each entry is a pattern (a placeholder token such as FIRST_NAME) paired with a replacement string. GetReplacePattern retrieves the search side of the pair at a given index; GetReplaceString retrieves the matching replacement. Reading them back is useful for inspecting or logging exactly which substitutions will be applied when the message is sent.

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Zig

const std = @import("std");
const chilkat = @import("chilkat");

pub fn main(init: std.process.Init) !void {
    const alloc = init.arena.allocator();

    // Demonstrates the GetReplacePattern method, which returns a replacement pattern (the
    // search string) previously defined for mail-merge operations with SetReplacePattern.
    // The index is zero-based.

    const email = try chilkat.Email.init();
    defer email.deinit();
    email.setSubject("Hello FIRST_NAME");
    email.setBody("Dear FIRST_NAME, welcome to CITY.");

    email.setReplacePattern("FIRST_NAME", "John") catch {};
    email.setReplacePattern("CITY", "Denver") catch {};

    const n = email.getNumReplacePatterns();
    var i: i32 = 0;
    i = 0;
    while (i < n) : (i += 1) {
        std.debug.print("Pattern {d}: {s}\n", .{ i, try email.getReplacePattern(alloc, i) });
    }
}