acecode/src/memory/memory_index.cpp at master · tmoonlight/acecode · GitHub

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
#include "memory_index.hpp"

#include <sstream>
#include <unordered_map>
#include <unordered_set>

namespace acecode {

namespace {

// Extract the entry name from a managed index line. A managed line starts
// with "- [" and contains "](<stem>.md)". Returns empty string when the line
// is not a managed entry reference so free-form user notes survive untouched.
std::string extract_name_from_line(const std::string& line) {
    // Require a leading "- [" preceded only by whitespace to avoid mangling
    // lines like "  note: we have -[old] references".
    std::size_t i = 0;
    while (i < line.size() && (line[i] == ' ' || line[i] == '\t')) ++i;
    if (i >= line.size() || line[i] != '-') return {};
    ++i;
    if (i >= line.size() || line[i] != ' ') return {};
    ++i;
    if (i >= line.size() || line[i] != '[') return {};

    // Find the matching ](<...>.md).
    std::size_t close_bracket = line.find(']', i);
    if (close_bracket == std::string::npos) return {};
    if (close_bracket + 1 >= line.size() || line[close_bracket + 1] != '(') return {};
    std::size_t close_paren = line.find(')', close_bracket + 2);
    if (close_paren == std::string::npos) return {};

    std::string target = line.substr(close_bracket + 2,
                                     close_paren - (close_bracket + 2));
    const std::string ext = ".md";
    if (target.size() <= ext.size()) return {};
    if (target.compare(target.size() - ext.size(), ext.size(), ext) != 0) return {};
    return target.substr(0, target.size() - ext.size());
}

std::vector<std::string> split_lines_keep_endings(const std::string& text) {
    std::vector<std::string> out;
    std::size_t start = 0;
    for (std::size_t i = 0; i < text.size(); ++i) {
        if (text[i] == '\n') {
            out.push_back(text.substr(start, i - start + 1));
            start = i + 1;
        }
    }
    if (start < text.size()) {
        out.push_back(text.substr(start));
    }
    return out;
}

} // namespace

std::string format_memory_index_line(const MemoryEntry& entry) {
    // em-dash separator mirrors the Claude Code convention in MEMORY.md hook lines.
    return "- [" + entry.description + "](" + entry.name + ".md) \xE2\x80\x94 "
           + entry.description;
}

std::string render_memory_index(const std::vector<MemoryEntry>& entries,
                                const std::string& existing_text) {
    std::unordered_map<std::string, const MemoryEntry*> by_name;
    by_name.reserve(entries.size());
    for (const auto& e : entries) by_name[e.name] = &e;

    std::unordered_set<std::string> rewritten;

    std::vector<std::string> lines;
    if (!existing_text.empty()) {
        lines = split_lines_keep_endings(existing_text);
    }

    std::ostringstream oss;
    bool produced_any = false;

    if (lines.empty()) {
        for (const auto& entry : entries) {
            oss << format_memory_index_line(entry) << '\n';
            rewritten.insert(entry.name);
            produced_any = true;
        }
    } else {
        for (const auto& raw_line : lines) {
            std::string body = raw_line;
            std::string ending;
            if (!body.empty() && body.back() == '\n') {
                ending = "\n";
                body.pop_back();
            }

            std::string name = extract_name_from_line(body);
            if (name.empty()) {
                oss << body << (ending.empty() ? std::string{} : ending);
                produced_any = true;
                continue;
            }
            auto it = by_name.find(name);
            if (it == by_name.end()) {
                // Stale entry: drop the line entirely.
                continue;
            }
            oss << format_memory_index_line(*it->second) << (ending.empty() ? "\n" : ending);
            rewritten.insert(name);
            produced_any = true;
        }

        for (const auto& entry : entries) {
            if (rewritten.count(entry.name)) continue;
            if (produced_any) {
                oss << format_memory_index_line(entry) << '\n';
            } else {
                oss << format_memory_index_line(entry) << '\n';
                produced_any = true;
            }
        }
    }

    std::string out = oss.str();
    if (!out.empty() && out.back() != '\n') out.push_back('\n');
    return out;
}

std::string remove_memory_index_line(const std::string& existing_text,
                                     const std::string& name) {
    if (existing_text.empty()) return existing_text;
    std::vector<std::string> lines = split_lines_keep_endings(existing_text);
    std::ostringstream oss;
    for (const auto& raw : lines) {
        std::string body = raw;
        std::string ending;
        if (!body.empty() && body.back() == '\n') {
            ending = "\n";
            body.pop_back();
        }
        if (extract_name_from_line(body) == name) continue;
        oss << body << ending;
    }
    return oss.str();
}

} // namespace acecode