From 32c188ae8fc662cf32ed16bf1d38a5391094ddda Mon Sep 17 00:00:00 2001
From: default <nobody@localhost>
Date: Mon, 19 Sep 2022 22:19:14 +0200
Subject: [PATCH] New functions snac_open() and snac_free().

---
 main.c |  6 ++++
 snac.c | 96 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 snac.h | 12 ++++++++
 3 files changed, 114 insertions(+)

diff --git a/main.c b/main.c
index 9a3f71c..d047a64 100644
--- a/main.c
+++ b/main.c
@@ -7,7 +7,13 @@
 
 int main(int argc, char *argv[])
 {
+    snac snac;
+
+    printf("%s\n", tid());
+
     srv_open("/home/angel/lib/snac/comam.es");
 
+    snac_open(&snac, "mike");
+
     return 0;
 }
diff --git a/snac.c b/snac.c
index 95d2814..fa84c03 100644
--- a/snac.c
+++ b/snac.c
@@ -14,6 +14,9 @@
 
 #include "snac.h"
 
+#include <sys/time.h>
+
+
 d_char *srv_basedir = NULL;
 d_char *srv_config  = NULL;
 d_char *srv_baseurl = NULL;
@@ -39,6 +42,18 @@ d_char *xs_time(char *fmt, int local)
 }
 
 
+d_char *tid(void)
+/* returns a time-based Id */
+{
+    struct timeval tv;
+    struct timezone tz;
+
+    gettimeofday(&tv, &tz);
+
+    return xs_fmt("%10d.%06d", tv.tv_sec, tv.tv_usec);
+}
+
+
 void srv_debug(int level, d_char *str)
 /* logs a debug message */
 {
@@ -103,3 +118,84 @@ int srv_open(char *basedir)
 
     return ret;
 }
+
+
+int validate_uid(char *uid)
+/* returns if uid is a valid identifier */
+{
+    while (*uid) {
+        if (!(isalnum(*uid) || *uid == '_'))
+            return 0;
+
+        uid++;
+    }
+
+    return 1;
+}
+
+
+int snac_open(snac *snac, char *uid)
+/* opens a user */
+{
+    int ret = 0;
+
+    memset(snac, '\0', sizeof(struct _snac));
+
+    if (validate_uid(uid)) {
+        xs *cfg_file;
+        FILE *f;
+
+        snac->uid = xs_str_new(uid);
+
+        snac->basedir = xs_fmt("%s/user/%s", srv_basedir, uid);
+
+        cfg_file = xs_fmt("%s/user.json", snac->basedir);
+
+        if ((f = fopen(cfg_file, "r")) != NULL) {
+            xs *cfg_data;
+
+            /* read full config file */
+            cfg_data = xs_readall(f);
+            fclose(f);
+
+            if ((snac->config = xs_json_loads(cfg_data)) != NULL) {
+                xs *key_file = xs_fmt("%s/key.json", snac->basedir);
+
+                if ((f = fopen(key_file, "r")) != NULL) {
+                    xs *key_data;
+
+                    key_data = xs_readall(f);
+                    fclose(f);
+
+                    if ((snac->key = xs_json_loads(key_data)) != NULL) {
+                        snac->actor = xs_fmt("%s/%s", srv_baseurl, uid);
+                        ret = 1;
+                    }
+                    else
+                        srv_log(xs_fmt("cannot parse %s", key_file));
+                }
+                else
+                    srv_log(xs_fmt("error opening '%s'", key_file));
+            }
+            else
+                srv_log(xs_fmt("cannot parse %s", cfg_file));
+        }
+        else
+            srv_log(xs_fmt("error opening '%s'", cfg_file));
+    }
+    else
+        srv_log(xs_fmt("invalid user '%s'", uid));
+
+    return ret;
+}
+
+
+void snac_free(snac *snac)
+/* frees a user snac */
+{
+    free(snac->uid);
+    free(snac->basedir);
+    free(snac->config);
+    free(snac->key);
+    free(snac->actor);
+}
diff --git a/snac.h b/snac.h
index ef14425..c14fd79 100644
--- a/snac.h
+++ b/snac.h
@@ -11,8 +11,20 @@ d_char *xs_time(char *fmt, int local);
 #define xs_local_time(fmt) xs_time(fmt, 1)
 #define xs_utc_time(fmt)   xs_time(fmt, 0)
 
+d_char *tid(void);
+
 void srv_debug(int level, d_char *str);
 #define srv_log(str) srv_debug(0, str)
 
 int srv_open(char *basedir);
 
+typedef struct _snac {
+    d_char *uid;        /* uid */
+    d_char *basedir;    /* user base directory */
+    d_char *config;     /* user configuration */
+    d_char *key;        /* keypair */
+    d_char *actor;      /* actor url */
+} snac;
+
+int snac_open(snac *snac, char *uid);
+void snac_free(snac *snac);